Certainty or Faith? Arendt's and Merleau-Ponty's Critique of Cartesian Foundationalism

Epistemological foundationalism has for centuries attempted to unify all scientific inquiry into the context of one grand science, the first philosophy. One of the most important tasks of this tradition has been to ground all knowledge on absolutely certain foundations. In this master s thesis I ask the following question: To what extent and under what conditions is it possible to achieve absolute certainty in the sense of the attempts of Cartesian foundationalism? By examining how the 20th century philosophers, Edmund Husserl (1859-1938), Hannah Arendt (1906-1975) and Maurice Merleau-Ponty (1908-1961) interpret the epistemological methodology of René Descartes, I claim that the Cartesian achievement of absolute certainty rests on the implicit presupposition of an epistemologically prior form of faith in the world and trust (pistis) in other conscious beings. I show that knowledge is possible only within the context of a common world that is inhabited by several conscious beings that share a common linguistic system. This threefold element is shown to be the bedrock condition for any kind of philosophical inquiry. The main literature sources for this thesis are The Life of the Mind by Hannah Arendt, Le Visible et l invisible by Maurice Merleau-Ponty, Meditationes de Prima Philosophiae by René Descartes and Erfahrung und Urteil by Edmund Husserl.

Suomi kasvitieteen kieleksi : Elias Lönnrot termistön kehittäjänä

The development of botanical Finnish: Elias Lönnrot as the creator of new terminology In the 19th century the Finnish language was intentionally developed to meet the demands of civilised society and Finnish-language science. The development of the language involved several people from different fields of science. This study examines this enormous project in the field of botany. By which methods were scientific terms formed, and for which reasons were those terms used? Why has a certain word been chosen to represent a particular concept? The material of this study is the terminology of plant morphology in Finnish that Elias Lönnrot developed in the middle of the 19th century. The terms of plant morphology denote and describe the parts of the plant and the relationships between those parts. For instance, the terms emi pistill , hede stamen , terälehti petal and verholehti sepal , which are nowadays familiar in the general language, were used for the first time in Lönnrot s texts. The study integrates the methods of lexicology and terminology. In lexicology, the word and its various meanings serve as the focus, whereas the theory of terminology focuses on the concept and concept systems. A new, consciously developed terminology can be understood through the old, familiar vocabulary and structures as well as through the new, logical term system. Lönnrot s botanical terminology can be divided into three groups depending on their origin: 1) 19% of all terms have been accepted from the existing vocabulary and used in their original meanings, 2) 11% of all terms have been chosen from the existing vocabulary and used in the new, specific botanical meanings, and 3) 70% of all terms have been created on the basis of the existing vocabulary and used in the new, specific botanical meanings. Therefore, the study reveals that domestic materials primarily morphosemantic neologisms form the Finnish terminology of plant morphology. Characteristic of Lönnrot s botanical terms is the utilisation of the vocabulary of various Finnish dialects and particular repeating elements. Repeating elements include, for example, the prefixes that come from botanical Latin or Swedish as well as the particular Finnish derivation types. Such structures form term systems that reflect scientific concept systems. Two thirds of the created new words are formed loosely or precisely according to either Latin or Swedish terms; one third is formed completely differently from its equivalents in the foreign languages. Approximately half of the chosen terms are formed differently from the Latin and Swedish terms. It is worth noting that many loan translations use rare vocabulary from Finnish dialects as equivalents to foreign parts of terms. Lönnrot aimed to inspire scientific terminology with Finland s own language, thus making scientific text accessible to the Finnish agricultural population.

Hyvinvointi on jaettava oikeudenmukaisesti : Velvoittaminen Tarja Halosen uudenvuodenpuheissa

Tutkielma käsittelee velvoittamista ja ohjailemista Tarja Halosen uudenvuodenpuheissa. Aineistona on kahdeksan uudenvuodenpuhetta, vuosilta 2001–2008. Puheet ovat luettavissa Kotimaisten kielten tutkimuskeskuksen aineistopalvelu Kainon kautta (www.kaino.kotus.fi) sekä presidentin kanslian internetsivuilta (www.tpk.fi). Tutkielmassa käsitellään puheita kirjoitettuina teksteinä ja tutkitaan niitä tekstintutkimuksen työvälinein. Tärkeän teoriataustan työlle muodostaa myös Perelmanin ja Olbrechts-Tytecan retoriikka- ja argumentaatioanalyysi. Analyysissa selvitetään ensiksi, millä keinoin Halonen velvoittaa kuulijaa puheissaan, ja toiseksi, keitä tai mitä ohjailevissa ilmauksissa velvoitetaan. Kolmanneksi tarkastellaan vielä velvoittavien ilmausten esiintymistä tekstiympäristössään: useasta typografisesta kappaleesta koostuvissa temaattisissa kokonaisuuksissa ja yhden typografisen kappaleen mittaisissa tekstikokonaisuuksissa. Myös presidentin uudenvuodenpuheen kokonaisrakennetta esitellään lyhyesti. Tutkielma etenee siten, että ensin tarkastellaan uudenvuodenpuheissa esiintyviä sellaisia kehotuksia, jotka kirjoittaja on katsonut eksplisiittisiksi tai kiistattomiksi velvoitteiksi: imperatiivimuotoisia kehotuksia, nesessiivirakenteita ja modaalisia verbejä deonttisen modaalisuuden ilmauksina sekä yksikön ensimmäisen persoonan käyttöä tietyissä ilmauksissa. Näistä siirrytään käsittelemään implisiittisempää velvoittamista: esimerkiksi lauseeseen valittujen sanojen leksikaalinen merkitys vaikuttaa siihen, tulkitseeko kuulija ilmauksen velvoittavaksi. Halosen uudenvuodenpuheissa usein indikatiivinen väitelause etääntyy pelkän episteemisen varmuuden toteamisen tehtävästä ja lähestyy velvoittamisen ja kuulijan ohjaamisen tehtävää (esim. "Meidän tehtävämme on arvojen siirtäminen tuleville sukupolville"). Aineistosta ilmenee, että Halosen uudenvuodenpuheissa velvoittavat ilmaukset voivat joko suuntautua ilmipannulle velvoitettavalle, joka voi olla me tai te tai jokin kolmas nimetty toimija (esim. Irak tai Euroopan unioni), tai velvoitettava voi olla ilmipanematon. Merkille pantavaa on, että kolmannelle nimetylle toimijalle suunnatuilla velvoitteilla on kahtalainen tehtävä: esimerkiksi lause "Irakin on noudatettava ehdoitta turvallisuusneuvoston päätöslauselmia" on muodoltaan velvoite (nesessiivirakenne), mutta kuulijan näkökulmasta se on presidentin lausuma tiedottava toteamus asioiden tilasta. Uudenvuodenpuheen typografinen tekstikappale voi sisältää yhden tai useamman velvoittavan ilmauksen tai olla täysin velvoittamaton ja pikemminkin tiedottava. Säännönmukaista velvoittavien ilmausten suhteessa tekstiympäristöönsä on se, että typografisessa kappaleessa on aina yhden tai useamman velvoittavan ilmauksen lisäksi myös velvoitetta perustelevaa ja pohjustavaa ainesta.

Virolaisiin naistenlehtiin kirjoittuva materialistinen maailma : Annen, Eesti Naisen ja Stiilin kansijuttujen tarkastelua kriittisen tekstintutkimuksen menetelmällä

Pro gradu -tutkielmassani tarkastelen Viron kolmen suurimman naistenlehden kansijuttuja systeemis-funktionaalisen kieliopin menetelmällä. Lehdet ovat Anne, Eesti Naine ja Stiil. Aineisto, tammikuussa 2003 ? syyskuussa 2004 ilmestyneet 55 artikkelia, on pääosin haettu lehtien omista internetarkistoista. Tutkin kansijuttuja systeemis-funktionaalisen kieliopin menetelmällä. Tavoitteenani on ollut selvittää, minkälaisia arvoja, asenteita ja maailmankuvia teksteihin kirjoittuu. Lähestyn kansijuttuja ideationaalisen, interpersoonaisen ja tekstuaalisen metafunktion näkökulmista. Kaikki kolme metafunktiota esiintyvät kielellisissä ilmiöissä yhtä aikaa. Mitä tahansa puhuttua tai kirjoitettua lausetta on mahdollista analysoida minkä tahansa metafunktion kannalta. Ideationaalinen metafunktio tarkoittaa yhtäältä sitä, minkälaisena maailma ja ilmiöt teksteissä kuvataan, toisaalta sitä, minkälaisia prosesseja teksteissä representoidaan. Interpersoonainen metafunktio tarkoittaa teksteihin kirjoittuvia suhteita, vuorovaikutusta ja identiteettejä, esimerkiksi toimittajan ja lukijan välistä suhdetta ja heidän roolejaan. Kun tekstiä tutkitaan tekstuaalisen metafunktion kannalta, siitä nostetaan esiin kieliopillisia, sanastollisia ja syntaktisia piirteitä, joista tekstit rakentuvat koherenteiksi kokonaisuuksiksi. Pro graduni kuuluu kriittisen tekstintutkimuksen alaan. Kriittinen tekstintutkimus on monitieteinen menetelmä, jonka tavoitteena on selvittää kielellisesti representoituja valtasuhteita sekä eksplisiittisesti ja implisiittisesti lauseisiin kirjoittuvia arvotuksia. Kriittisen tekstintutkimuksen tavoitteena on osoittaa, millä tavalla ihmisten ajattelua pystytään ohjaamaan ja hallitsemaan kielellisten ratkaisujen keinoin. Viron kolmen suurimman naistenlehden kansijutuille yhteinen piirre on materialistinen maailmankuva, joka ilmenee teksteissä muun muassa korostuneena kulutustottumusten, ulkonäön ja elämäntyylin kuvailuna. Tekstit ovat avoimen kaupallisia. Selkein osoitus kaupallisuudesta on tunnetuttujen vaate-, kosmetiikka ja automerkkien näkyminen teksteissä, luonnollisena osana juttua. Kansijuttujen haastateltavat ovat eri aloja edustavia, korkeasti koulutettuja, itsenäisiä ja näkyvissä asemissa vaikuttavia henkilöitä, valtaosaltaan naisia. Juttuihin he representoituvat perhettä, isänmaata ja uskontoa arvostavina perusarvojen kannattajina, joita esimerkiksi tasa-arvokysymykset, syrjäytyminen tai globalisaatio eivät kiinnosta. Keskeinen kysymys onkin journalistinen prosessi, jonka tuloksena kansijutut ovat syntyneet. Vaikka kansijutuissa näennäisesti äänessä ovat voimakkaat virolaisnaiset, voi rivien välistä ymmärtää, että tarinan kerrontaan vaikuttavat myös julkaisijoiden taloudelliset intressit. Avainsanat: diskurssi, funktionaalisuus, genre, ideologia, kansijuttu, luonnollistuma, media, metafunktio, naistenlehti, tavoite, tekstilaji, tervejärkisyys, valta, virolainen

"Ei vittu, mennään röökille" : tutkimus sitaattien tehtävistä ja tekemisestä kaunokirjallis-journalistisissa lehtijutuissa

This research deals with direct speech quotations in magazine articles through two questions: As my major research question, I study the functions of speech quotations based on a data consisting of six literary-journalistic magazine articles. My minor research question builds on the fact that there is no absolute relation between the sound waves of the spoken language and the graphemes of the written one. Hence, I study the general thoughts on how utterances should be arranged in the written form based on a large review of literature and textbooks on journalistic writing as well as interviews I have made with magazine writers and editors, and the Council of Mass Media in Finland. To support my main research questions, I also examine the reference system of the Finnish language, define the aspects of the literary-journalistic article and study vernacular cues in written speech quotations. FUNCTIONS OF QUOTATIONS. I demonstrate the results of my analysis with a six-pointed apparatus. It is a continuum which extends from the structural level of text, all the way through the explicit functions, to the implicit functions of the quotation. The explicit functions deal with the question of what is the content, whereas the implicit ones base mainly on the question how the content is presented. 1. The speech quotation is an distinctive element in the structure of the magazine article. Thereby it creates a rhythm for the text, such as episodes, paragraphs and clauses. 2. All stories are told through a plot, and in magazine articles, the speech quotations are one of the narrative elements that propel the plot forward. 3. The speech quotations create and intensify the location written in the story. This location can be a physical one but also a social one, in which case it describes the atmosphere and mood in the physical environment and of the story characters. 4. The quotations enhance the plausibility of the facts and assumptions presented in the article, and moreover, when a text is placed between quotation marks, the reader can be assured that the text has been reproduced in the authentic verbatim way. 5. Speech quotations tell about the speaker's unique way of using language and the first-hand experiences of the person quoted. 6. The sixth function of speech quotations is probably the most essential one: the quotations characterize the quoted speaker. In other words, in addition to the propositional content of the utterance, the way in which it has been said transmits a lot of the speaker's character (e.g. nature, generation, behaviour, education, attitudes etc.). It is important to notice, that these six functions of my speech quotation apparatus do not exlude one another. It means that every speech quotation basically includes all of the functions discussed above. However, in practice one or more of them have a principal role, while the others play a subsidiary role. HOW TO MAKE QUOTATIONS? It is not suprising that the field of journalism (textbooks, literature and interviews) holds heterogeneous and unestablished thoughts on how the spoken language should be arranged in written quotations, which is my minor research question. However, the most frequent and distinctive aspects can be depicted in a couple of words: serve the reader and respect the target person. Very common advice on how to arrange the quotations is − firstly, to delete such vernacular cues (e.g. repetitions and ”expletives”) that are common in spoken communication, but purposeless in the written language. − secondly, to complete the phonetic word forms of the spoken language into a more reader-friendly form (esim. punanen → punainen, 'red'), and − thirdly, to enhance the independence of clauses from the (authentic) context and to toughen reciprocal links between them. According to the knowledge of the journalistic field, utterances recorded in different points in time of an interview or a data-collecting session can be transferred as consecutive quotations or even merged together. However, if there is any temporal-spatial location written in the story, the dialogue of the story characters should also be situated in an authentic context – chronologically in the right place in the continuum of the events. To summarize, the way in which the utterances should be arranged into written speech quotations is always situationally-specific − and it is strongly based on the author's discretion.

Studies of working memory in interrupted human-computer interaction

Distraction in the workplace is increasingly more common in the information age. Several tasks and sources of information compete for a worker's limited cognitive capacities in human-computer interaction (HCI). In some situations even very brief interruptions can have detrimental effects on memory. Nevertheless, in other situations where persons are continuously interrupted, virtually no interruption costs emerge. This dissertation attempts to reveal the mental conditions and causalities differentiating the two outcomes. The explanation, building on the theory of long-term working memory (LTWM; Ericsson and Kintsch, 1995), focuses on the active, skillful aspects of human cognition that enable the storage of task information beyond the temporary and unstable storage provided by short-term working memory (STWM). Its key postulate is called a retrieval structure an abstract, hierarchical knowledge representation built into long-term memory that can be utilized to encode, update, and retrieve products of cognitive processes carried out during skilled task performance. If certain criteria of practice and task processing are met, LTWM allows for the storage of large representations for long time periods, yet these representations can be accessed with the accuracy, reliability, and speed typical of STWM. The main thesis of the dissertation is that the ability to endure interruptions depends on the efficiency in which LTWM can be recruited for maintaing information. An observational study and a field experiment provide ecological evidence for this thesis. Mobile users were found to be able to carry out heavy interleaving and sequencing of tasks while interacting, and they exhibited several intricate time-sharing strategies to orchestrate interruptions in a way sensitive to both external and internal demands. Interruptions are inevitable, because they arise as natural consequences of the top-down and bottom-up control of multitasking. In this process the function of LTWM is to keep some representations ready for reactivation and others in a more passive state to prevent interference. The psychological reality of the main thesis received confirmatory evidence in a series of laboratory experiments. They indicate that after encoding into LTWM, task representations are safeguarded from interruptions, regardless of their intensity, complexity, or pacing. However, when LTWM cannot be deployed, the problems posed by interference in long-term memory and the limited capacity of the STWM surface. A major contribution of the dissertation is the analysis of when users must resort to poorer maintenance strategies, like temporal cues and STWM-based rehearsal. First, one experiment showed that task orientations can be associated with radically different patterns of retrieval cue encodings. Thus the nature of the processing of the interface determines which features will be available as retrieval cues and which must be maintained by other means. In another study it was demonstrated that if the speed of encoding into LTWM, a skill-dependent parameter, is slower than the processing speed allowed for by the task, interruption costs emerge. Contrary to the predictions of competing theories, these costs turned out to involve intrusions in addition to omissions. Finally, it was learned that in rapid visually oriented interaction, perceptual-procedural expectations guide task resumption, and neither STWM nor LTWM are utilized due to the fact that access is too slow. These findings imply a change in thinking about the design of interfaces. Several novel principles of design are presented, basing on the idea of supporting the deployment of LTWM in the main task.

Assessing university students' prior knowledge

The aim of this dissertation was to explore how different types of prior knowledge influence student achievement and how different assessment methods influence the observed effect of prior knowledge. The project started by creating a model of prior knowledge which was tested in various science disciplines. Study I explored the contribution of different components of prior knowledge on student achievement in two different mathematics courses. The results showed that the procedural knowledge components which require higher-order cognitive skills predicted the final grades best and were also highly related to previous study success. The same pattern regarding the influence of prior knowledge was also seen in Study III which was a longitudinal study of the accumulation of prior knowledge in the context of pharmacy. The study analysed how prior knowledge from previous courses was related to student achievement in the target course. The results implied that students who possessed higher-level prior knowledge, that is, procedural knowledge, from previous courses also obtained higher grades in the more advanced target course. Study IV explored the impact of different types of prior knowledge on students’ readiness to drop out from the course, on the pace of completing the course and on the final grade. The study was conducted in the context of chemistry. The results revealed again that students who performed well in the procedural prior-knowledge tasks were also likely to complete the course in pre-scheduled time and get higher final grades. On the other hand, students whose performance was weak in the procedural prior-knowledge tasks were more likely to drop out or take a longer time to complete the course. Study II explored the issue of prior knowledge from another perspective. Study II aimed to analyse the interrelations between academic self-beliefs, prior knowledge and student achievement in the context of mathematics. The results revealed that prior knowledge was more predictive of student achievement than were other variables included in the study. Self-beliefs were also strongly related to student achievement, but the predictive power of prior knowledge overruled the influence of self-beliefs when they were included in the same model. There was also a strong correlation between academic self-beliefs and prior-knowledge performance. The results of all the four studies were consistent with each other indicating that the model of prior knowledge may be used as a potential tool for prior knowledge assessment. It is useful to make a distinction between different types of prior knowledge in assessment since the type of prior knowledge students possess appears to make a difference. The results implied that there indeed is variation between students’ prior knowledge and academic self-beliefs which influences student achievement. This should be taken into account in instruction.

Finnish Homicides and Mental Disorders: An investigation of offense and offender characteristics

Although the majority of people with mental illness are not violent, scientific studies over the last decades show that certain psychiatric disorders increase the risk of violent behavior, including homicide. This thesis examined crime scene behaviors and offender background characteristics among mentally ill Finnish homicide offenders. Previously, homicide crime scene behaviors have been investigated in relation to offender demographic characteristics, whereas this study compares the behaviors of offenders with various mental illnesses. The study design was a retrospective chart review of the forensic psychiatric statements of Finnish homicide offenders. The work consists of four substudies. The aims of the study were as follows: To describe differences in the childhood and family backgrounds as well as in the adolescent and adult adjustment of Finnish homicide offenders belonging to different diagnostic categories (schizophrenia, personality disorder, alcoholism, drug addiction or no diagnosis). Further, the study examined associations between the crime scene behaviors and mental status of these offenders. Also, the distinguishing characteristics between two groups of offenders with schizophrenia were examined: early starters, who present antisocial behavior before the onset of schizophrenia, and late starters, who first offend after the onset of mental disorder. Finally, it was investigated how the use of excessive violence is associated with clinical and circumstantial variables as well as offender background characteristics among homicide offenders with schizophrenia. The main findings of the study can be summarized as follows. First, offenders with personality disorder or drug addiction had experienced multiple difficulties in their early environments: both family and individual problems were typical. Offenders with schizophrenia were relatively well-adjusted in childhood compared to the other groups. However, in adolescence and adulthood, social isolation, withdrawal and other difficulties attributable to these offenders illness became evident. In several aspects, offenders with alcohol dependency resembled offenders with no diagnosis in that these offenders had less problematic backgrounds compared to other groups. Second, the results showed that crime scene behaviors, victim gender and the victim-offender relationship differ between the groups. In particular, offenders with a diagnosis of schizophrenia or drug addiction have some unique features in their crime scene behaviors and choice of victims. Offenders with schizophrenia were more likely to kill a blood relative, to use a sharp weapon and to injure the victim s face. Drug addiction was associated with stealing from the victim and trying to cover up the body. Third, the results suggest that the offense characteristics of early- and late-start offenders with schizophrenia differ only modestly. However, several significant differences between the groups were found in characteristics of offenders: early starters had experienced a multitude of problems in their childhood surroundings and also later in life. Fourth, violent acts where the offender did not commit the offense alone or had previous homicidal history were predictive of excessive violence among offenders with schizophrenia. Positive psychotic symptoms did not predict the use of excessive violence. Nearly one third of the cases in the sample involved multiple and severe violence, including features such as sadism, mutilation, sexual components or extreme stabbing. In sum, mentally disordered homicide offenders are heterogeneous in their offense characteristics as well as their background characteristics. Empirically based information on how the offender s mental state is associated with specific crime scene behaviors can be utilized within the police force in developing methods of prioritizing suspects in unsolved homicide cases. Also, these results emphasise the importance of early interventions for problem families and children at risk of antisocial behavior. They may also contribute to the development of effective treatment for violent offenders.

Lionhearts of the Playworld : An ethnographic case study of the development of agency in play pedagogy

This is an ethnographic case study of the creation and emergence of a playworld – a pedagogical approach aimed at promoting children’s development and learning in early education settings through the use of play and drama. The data was collected in a Finnish experimental mixed-age elementary school classroom in the school year 2003-2004. In the playworld students and teachers explore different social and cultural phenomena through taking on the roles of characters from a story or a piece of literature and acting inside the frames of an improvised plot. The thesis takes under scrutiny the notion of agency in education. It produces theoretically grounded empirical knowledge of the ways in which children struggle to become recognized and agentive actors in early education settings and how their agency develops in their interaction with adults. The study builds on the activity theoretical and sociocultural tradition and develops a methodological framework called video-based narrative interaction analysis for studying student agency as developing over time but manifesting through the situational material and discursive local interactions. The research questions are: 1. What are the children’s ways of enacting their agency in the playworld? 2. How do the children’s agentive actions change and develop over the spring? 3. What are the potentials and challenges of the playworld for promoting student agency? 4. How do the teachers and the children deal with the contradiction between control and agency in the playworld? The study consists of a summary part and four empirical articles which each have a particular viewpoint. Articles I and II deal with individual students’ paths to agency. In Article I the focus is on the role of resistance and questioning in enabling important spaces for agency. Article II takes a critical gender perspective and analyzes how two girls struggled towards recognition in the playworld. It also illuminates the role of imagination in developing a sense of agency. Article III examines how the open-ended and improvisational nature of the playworld interaction provided experiences and a sense of ‘shared agency’ for the students and teachers in the class. Article IV turns the focus on the teachers and analyzes how their role actions in the playworld helped the children to enact agency. It also discusses the challenges that the teachers faced in this work and asks what makes the playworld activity sustainable in the class. The summary part provides a critical literature review on the concept of agency and argues that the inherently contradictory nature of the phenomenon of agency has not been sufficiently theorized. The summary part also locates the playworld intervention in a historical frame by discussing the changing conceptions of adulthood and childhood in the West. By focusing on the changing role of play and art in both adults’ and children’s contemporary lives, the thesis opens up an important but often neglected perspective on the problem of promoting student agency in education. The results illustrate how engaging in a collectively imagined and dramatized pretend play space together with the children enabled the teachers to momentarily put aside their “knower” positions in the classroom. The fictive roles and the narrative plot helped them to create a necessary incompleteness and open-endedness in the activity that stimulated the children’s initiatives. This meant that the children too could momentarily step out of their traditional classroom positions as pupils and initiate action to further the collective play. Engaging in this kind of unconventional activity and taking up and enacting agency was, however, very challenging for the participating children and teachers. It often contradicted the need to sustain control and order in the classroom. The study concludes that play- and drama-based pedagogies offer a unique but undeveloped potential for developing educational spaces that help teachers and children deal with the often contradictory requirements of schooling.

Feature integration in human vision

The earliest stages of human cortical visual processing can be conceived as extraction of local stimulus features. However, more complex visual functions, such as object recognition, require integration of multiple features. Recently, neural processes underlying feature integration in the visual system have been under intensive study. A specialized mid-level stage preceding the object recognition stage has been proposed to account for the processing of contours, surfaces and shapes as well as configuration. This thesis consists of four experimental, psychophysical studies on human visual feature integration. In two studies, classification image a recently developed psychophysical reverse correlation method was used. In this method visual noise is added to near-threshold stimuli. By investigating the relationship between random features in the noise and observer s perceptual decision in each trial, it is possible to estimate what features of the stimuli are critical for the task. The method allows visualizing the critical features that are used in a psychophysical task directly as a spatial correlation map, yielding an effective "behavioral receptive field". Visual context is known to modulate the perception of stimulus features. Some of these interactions are quite complex, and it is not known whether they reflect early or late stages of perceptual processing. The first study investigated the mechanisms of collinear facilitation, where nearby collinear Gabor flankers increase the detectability of a central Gabor. The behavioral receptive field of the mechanism mediating the detection of the central Gabor stimulus was measured by the classification image method. The results show that collinear flankers increase the extent of the behavioral receptive field for the central Gabor, in the direction of the flankers. The increased sensitivity at the ends of the receptive field suggests a low-level explanation for the facilitation. The second study investigated how visual features are integrated into percepts of surface brightness. A novel variant of the classification image method with brightness matching task was used. Many theories assume that perceived brightness is based on the analysis of luminance border features. Here, for the first time this assumption was directly tested. The classification images show that the perceived brightness of both an illusory Craik-O Brien-Cornsweet stimulus and a real uniform step stimulus depends solely on the border. Moreover, the spatial tuning of the features remains almost constant when the stimulus size is changed, suggesting that brightness perception is based on the output of a single spatial frequency channel. The third and fourth studies investigated global form integration in random-dot Glass patterns. In these patterns, a global form can be immediately perceived, if even a small proportion of random dots are paired to dipoles according to a geometrical rule. In the third study the discrimination of orientation structure in highly coherent concentric and Cartesian (straight) Glass patterns was measured. The results showed that the global form was more efficiently discriminated in concentric patterns. The fourth study investigated how form detectability depends on the global regularity of the Glass pattern. The local structure was either Cartesian or curved. It was shown that randomizing the local orientation deteriorated the performance only with the curved pattern. The results give support for the idea that curved and Cartesian patterns are processed in at least partially separate neural systems.

Kehittämisen kompastuskivet - myytit kehittämishankkeen keskusteluissa

I studied discussions during development project. Aim of the study was to analyse, what way workers represented their work: how normalized way of interpretation myths appeared in discourse and what consequences these utterances caused to drift of discussion. Change laboratory, which is a development method, is based to developmental work research methodology. Development is designed to be successful by learning activity and learning acts. Preventing factors of learning have been studied widely. Research has leaned to concept of resistance to change. Phenomenon of learning has been interpreted to be successful only if everybody has an agreement about the situation. There is also a new kind of concept of resistance. Resistance can be seen as a part of learning, normal processing of the learning activity. Another preventing factor can be seen as disorders of discourse, which are verbal ways of telling something that aren t real. Theoretically I consider these verbal ways as myth interpretations, which can be used as argumentative tools. I used analysis of discourse as an analytical method. Results of analysis revealed four different myth interpretations in workers discussions. Character of work was been described with myths unforeseen situations and disturbances are normal . Work was also described to be functional with myths system works and workers cause disturbances . Change laboratory discussions can be described as different social languages, which caused diverse perspectives to workers and researchers representations. Social languages also affected the way people analysed disturbances and system. Critical phase of change laboratory method seems to be analysis of disturbances and planning new mode of action. Myth utterances were used to reject ways of developing, analysis of system level and need of development. Myth utterances worked three different ways: ineffective, active or passive.

Opiskelun ohjaus etälukiossa

Tutkimus tarkastelee opiskelijoiden kokemuksia opiskelun ohjauksesta etälukiossa. Etälukio on opetushallituksen syksyllä 1997 aloittama itseopiskeluväylä, jonka kautta voi suorittaa joko koko lukion oppimäärän tai yksittäisiäkursseja. Tutkimuksessa mielenkiinnon kohteena on ensinnäkin etälukiolaisten ohjauksen tarve ja heidän ohjauksensa toteutus. Ohjauksen toteutuksen tarkastelu jakaantuu kahteen osioon, kaksi-kolme kertaa kuussa järjestettävän lähiopetuksen tarkasteluun sekä faksin, kirjeen, puhelimen ja sähköpostin kautta tapahtuvan ohjauksen tarkasteluun. Keskeistä tutkimuksessa on myös opiskelijoiden ohjaukseen liittyvien kokemusten tarkastelu sekä se, millä tavoin ohjauksella on tuettu opiskelijoiden itsenäisten opiskeluvalmiuksien kehittymistä. Tutkimuksen teoriatausta jakaantuu kahteen osaan. Ensiksi analysoidaan etäopiskelun uusiin opiskeluympäristöihin keskeisesti liittyvää käsitettä avoin opiskeluympäristö, jonka määrittely on osoittautunut vaikeaksi. Toisen keskeisen osan teoriataustaa muodostaa ohjaus-käsitteen tarkastelu. Tutkimuksessa käytettiin kahta tiedonhankintamenetelmää. Kvantitatiiviseen kyselylomakkeeseen toukokuussa 1998 vastasi 115 opiskelijaa etälukion pilottialueilta Satakunnasta, Savosta ja Varsinais-Suomesta. Kyselylomakkeella hankittuja tietoja täydennettiin haastatteluilla joulukuussa 1998. Etälukiolaisten ohjauksen tarkastelu osoitti, että etälukio-opiskelu eroaa vain vähän muusta aikuislukio-opiskelusta. Suurimmalla osalla etälukiolaisista on tavoitteena ylioppilastutkinto, jonka sisällöt ja vaatimukset selkeästi rajoittavat yksilöllisyyden ja joustavuuden toteutumista etälukiossa. Etälukion opiskeluympäristön avoimuuden määrittely tarkemmin on jatkossa olennaisen tärkeätä. Tulokset osoittavat, että etälukiolaisten ohjaustarve oli ollut alhainen. Etälukion suorittaminen itsenäisesti osoittautui mahdolliseksi. Suurimman osan ohjauksesta opiskelijat olivat saaneet osallistumalla lähiopetukseen. Lähiopetus osoittautui luonteeltaan opettajajohtoiseksi ryhmäopetukseksi. Opiskelijat kokivat, että lähiopetukseen oleva aika on rajallinen, joten henkilökohtaisen ohjauksen pyytäminen lähiopetuksessa ei ollut ollut mahdollista. Opiskelijoista 40% oli hyödyntänyt lähiopetuksen lisäksi tarjottua ohjausta joko vain hyvin vähän tai ei lainkaan. Opiskelijoista yli puolet ei ollut käyttänyt sähköpostia lainkaan tai oli käyttänyt sitä vain harvemmin kuin kerran kuussa. Internetin ja sähköpostin käyttötaidoilla ei koettu olevan suurta merkitystä etälukio-opiskelussa. Opiskelijoiden ohjaukseen liittämät kokemukset olivat positiivisia. Tärkeintä opiskelijoille oli tieto siitä,että ohjausta oli tarvittaessa ollut saatavilla, vaikka sitä oli vain vähän hyödynnetty. Etälukiolaiset eivät kokeneet etälukio-opiskelun vaatineen uusien itsenäisten opiskelutaitojen oppimista. Avainsanat: avoin opiskeluympäristö, etäopiskelu, opiskelun ohjaus, tutorointi, aikuisopiskelu, etälukio Keywords: open learning, distance education, student guidance, tutoring, adult education, upper secondary distance learning

Tiedonhakustrategiat World Wide Webissä

Tutkimuksen tarkoituksena on selvittää, millaisia tiedonhakustrategioita tiedonhakijatkäyttävät etsiessään tietoa Internetistä. Käyttäjät luokitellaan kolmeen ryhmään tiedonhakustrategiansa mukaan. Haku-suuntautuneet käyttäjät käyttävät enimmäkseen hakukoneita, niin koko Internetin kattavia kuin sivustojen sisäisiäkin. Linkkisuuntautuneet taas joko tietävät tai arvaavat kohdesivuston osoitteen tai käyttävät laajoja hierarkkisia hakemistoja tiedon löytämiseen. He navigoivat mielummin sivustollakin linkkejä käyttäen eivätkä yleensä käytä hakutoimintoa. Eriytyneet käyttäjät eivät säännönmukaisesti suosi kumpaakaan tapaa, vaan valitsevat strategian tehtävän mukaan. Tietoa kerättiin kahdella tavalla: WWW-sivulla olleella kyselylomakkeella ja tiedonhakutestillä, jossa käyttäjille annettiin suoritettavaksi erilaisia tiedonhakutehtäviä. Tiedonhakutehtävät lajiteltiin kolmeen ryhmään sen mukaan, mitä strategiaa ne suosivat: hakustrategiaa suosivat, linkkistrategiaa suosivat ja neutraalit tehtävät. Tutkimusongelmana oli selvittää, kuinka tehtävän tyyppi ja ATK- ja Internet-kokemus vaikuttavat tiedonhakustrategian valintaan. Kävi ilmi, ettei käyttäjien suuntautuneisuus tiettyyn strategiaan vaikuta tiedonhakustrategian valintaan, vaan ainoastaan tehtävän tyyppi oli merkitsevä tekijä. Aikaisemman tutkimustiedon valossa kokeenet suosivat haku-suuntautunutta strategiaa. Tässä tutkimuksessa havaittiin, että kokemus lisäsi molempien strategioiden käyttöä yhtäläisesti, mutta tämä ilmiö oli havaittavissa ainoastaan kysely-lomakkeen pohjalta, ei testeissä. Molempien tiedonhakustrategioiden käyttö lisääntyy kokemuksen myötä, mutta suhteelliset osuudet pysyvät samoina. Syyksi sille, että kokeneet eivät suosineet hakustrategiaa, esitetään sitä, että tehtävät olivat liian helppoja, jolloin kokemus ei pääse auttamaan. Oleellisia eroja suoritusajoissa tai hakustrategian vaihdon tiheydessä ei havaittu suhteessa kokemukseen, ainoastaan suhteessa tehtävän tyyppiin.Tämäkin selitettiin toisentyyppisten tehtävien helppoudella. Tutkimuksessa pohditaan lisäksi asiantuntijuuden syntyä tiedonhakukontekstissa sekä esitetään metatietohypoteesi, jonka mukaan tiedonhakustrategian valintaan vaikuttaa tärkeänä tekijänä käyttäjän metatieto hakupalveluista. Metatietoon kuuluu tieto siitä, mitä hakukoneita on saatavilla, mitä tietoa verkosta kannattaa hakea, millä yrityksillä ja yhteisöillä on sisältörikkaat sivut jne, ja minkä tyyppistä tietoa yleensä on saatavilla. Kaikenkaikkiaan strategian valintaan esitetään taustalle kolmen tason tiedon vaikutusta: 1) oma asiantuntemus haettavasta alasta, 2) metatieto Internetin tiedonhakupalveluista sekä 3) tekninen tieto siitä, kuinka hakukoneet toimivat. Avainsanat: tiedonhaku, tiedonhakustrategia, hakukone, WWW, metatieto, kognitiivinen psykologia

Kotitaloustaidon ulottuvuuksia : Analyysi kotitaloustaidosta eksistentialistis-hermeneuttisen fenomenologian valossa

DOMESTIC SKILLS AS THE ART OF EVERYDAY LIFE. An inquiry about domestic skills as a way of being-in-the-world in the light of existentialist-hermeneutics phenomenology. This study focuses on analyzing domestic skills in a phenomenological manner. The description phenomenological emerges from the interpretation process, which originates from the ontological question of domestic skills. The ontological question of how domestic skills are directs one s phenomenological gaze to the experiencing of domestic skills, rather than merely viewing their action or technical aspects. Along with the ontological question, the axiological question of what the meaning of domestic skills is drives the analysis. This study is both theoretical and philosophical. Phenomenology is the guiding philosophy, theory and methodology of the inquiry. Existentialist-hermeneutics is the emphasis which most appropriately describes the phenomenological attitude adopted within the analysis. Martin Heidegger s philosophy of being and Maurice Merleau-Ponty s philosophy of the lived body essentially form the theoretical base for the inquiry. The analysis reveals domestic skills within a core of Care and the Other. Care and the Other are anchored both in Heidegger s analysis of Dasein and in Merleau-Ponty s analysis of the reversible being-in-the-world. The social nature of being and the action-oriented intentionality of the lived body are embodied in Care and the Other. This ontological base of domestic skills enables us to see the extensions that inhabit in it. These extensions are redoing, emotional experiencing, adapting and emancipating. The analysis connects ability and action, which is why domestic skills and household activity must be seen as a united whole. This united whole is not the matter of the two components of the phenomenon, but is rather the matter of domestic skills as a way of being-in-the-world. Domestic skills are a channel for the phenomenon Home Economics to manifest in our lives. This is the gaze that presents domestic skills as to be like the poetry of everyday life. The main result of the study is the elucidation of the ontology of domestic skills and the naming of its extensions. This growth of philosophical understanding makes it possible to strengthen the science of home economics.

Lapsi, lapsuus ja perhe varhaiskasvatusasiakirjoissa 1967-1999

The aim of this study is to describe and interpret discourses in Finnish national early childhood education and care (ECEC) documents concerning the child, childhood and family, including preschool education of six-year-old children. The study begins with preparation phase of the Act on Children s Day Care (1967) and concludes with the definition of ECEC policy (1999). The research data consists of committee memoranda and national ECEC curriculum guidelines. The total number of documents studied was 20, comprising some 1700 pages. The research data was examined with qualitative text analysis and employed a discursive approach. A semiotic square (Greimas rectangle) served as a tool for clarifying the discourses and constructions reflected in the research data. The theoretical framework of the study consists of the theories of childhood and family studies. The main concepts from childhood studies used in this study were childhood as a cultural construct and child-centred pedagogy in ECEC. The theoretical approaches from family studies used were the formation of modern and late-modern parenthood and family, as well as the concept of familism. Two main discursive lines were constructed from the ECEC documents. The notion of universalistic childhood suggests that early education and care aim to create the same good childhood for all children, regardless of their family background or living area. The second discursive line followed in the documents is the familistic discourse. This discourse contains emphasis on the priority of parental care. The construct of the competent child was found in the research data as early as in the mid-1970s. On the other hand, the construct of the weak family is distinguishable throughout almost the entire research period. This raises the question of whether Finnish ECEC system has been developed for the competent and self-sufficient child of a weak family which needs constant support and guidance of welfare experts. According to the study, it appears that within the Finnish ECEC system the relatively heavy emphasis on social work rather than on early education has been legitimised by the construct of the weak family. This study also shows that a more thorough analysis should be given to what we mean when we say that the main task of ECEC system is to support families in the upbringing of their children. The study was completed during the period when historical decisions concerning the administration in Finland were in the making (i.e. the potential transfer of ECEC services from the Ministry of Social Affairs and Health to the Ministry of Education). Also, over the past decade, a major reformation of the Act on Children s Daycare has been on the agenda, but no concrete measures have been implemented. Based on the findings of this study, we can ask for what kind of child and family we are preparing the ECEc reforms of the new millennium. Key words: ECEC policy Finland, childhood, family, familism, discourse analysis, semiotic square