Estudo experimental sobre a precisão e validade dos escores introversão-extroversão de uma adaptação brasileira do Maudsley Personality Inventory de H.J. Eysenck

O propósito dos trabalhos experimentais expostos na presente dissertação foi o de estudar a versão brasileira do Maudaley Personality Inventory. de Eysench. no que diz respeito à sua dimensão bipolar introversão-extroversão. A adaptação brasileira (devida à Professora Riva Bauzer) foi aplicada por duas vezes a 70 estudantes, de quatro turmas do Colégio Batista Shepard, que são nossos alunos de psicologia. Paralelamente a esta aplicação, foi aplicado por duas vezes sucessivas, aos mesmos alunos, um questionário por nós organizado. Nele era pedida a cada um uma avaliação subjetiva do grau de introversão-extroversão dos respectivos colegas de classe. Desse modo tivemos a possibilidade de avaliar: a) o coeficiente de precisão do questionário; b) o coeficiente de precisão do Maudeley Personality Inventory; c) o coeficiente de validade do Maudaley Persona lity Inventory, tomando o questionário como critério de validação. Entretanto, nao terminaram ai nossos trabalhos. Por meio do coeficiente de correlação bisserial, foi estimado o poder discriminante de cada uma das questões do Maudsley Personality Inventory, assim como seu grau de "popularidade". Esta é uma denominação por nós atribuida à porcentagem de sujeitos que assinalaram a questão no sentido de extroversão. Estes elementos abrem caminho para a realização de pesquisas ulteriores com a finalidade de aperfeiçoar a versão brasileira do Maudsley Personality Inventory.

Percepções de professores das dificuldades na prática docente em classes especiais de alunos treináveis nas escolas municipais do Rio de Janeiro

O objetivo desse estudo foi detectar as dificuldades percebidas pelas professoras de classes especiais de alunos deficientes mentais treináveis, da rede municipal de ensino do Rio de Janeiro, no exercício de suas atividades docentes. Procurou-se investigar como as professoras percebem suas dificuldades na prática docente: no sistema escolar, no professor ou no aluno e relacionar a influência da formação acadêmica e da experiência profissional nas percepções destas dificuldades. Foram envolvidas no estudo as vinte e quatro professoras, responsáveis pelo atendimento às classes de deficientes mentais treináveis da rede pública do Rio de Janeiro respondendo um questionário e participando de entrevista. Na validação do instrumento considerou-se a opinião de cinco juízes acerca do conteúdo e os resultados obtidos numa aplicação preliminar. Os resultados apurados indicaram uma tendência das professoras a perceberem as dificuldades principalmente na categoria sistema escolar e nas categorias associadas aluno e sistema escolar e não perceberem suas dificuldades nas categorias aluno e professor isoladamente. A pesquisa revelou a influência da formação acadêmica e da experiência profissional no sentido de que as professoras com formação de nível superior percebem as dificuldades na categoria sistema escolar, as com mais anos de magistério percebem as dificuldades na categoria sistema escolar e nas categorias associadas aluno e sistema escolar e as com maior experiência em classes especiais percebem as dificuldades na categoria sistema escolar.

Operacionalização dos objetivos educacionais nos cursos de engenharia

Para a consecução das finalidades de uma disciplina de um curso , várias estratégias de ensino podem ser utilizadas. A estratégia de ensino por objetivos operacionalizados adota, como princípio fundamental, a descrição dos objetivos educacionais em termos do desempenho esperado do aluno e a fixação de padrões mínimos de rendimento aceitável nesse desempenho. A programação de ensino por objetivos operacionalizados deve ser dada a conhecer ao educando, e deve servir de base para o planejamento das atividades docentes e discentes , orientando o aluno nos seus esforços para aprender, e o professor na escolha das técnicas e recursos de ensino que permitam tornar o ensino eficaz. Os resultados da pesquisa empírica realizada mostram que, no nível de efeito principal, o ensino por objetivos operacionalizados é ligeiramente superior ao ensino tradicional . Três turmas foram objeto do experimento, cujo propósito foi comparar , no ensino de Geometria Descritiva, a eficácia relativa das estratégias de ensino com programação por objetivos operacionalizados e a do ensino tradicional. Resultaram os Índices representativos daquela variável: 5,63 para o ensino tradicional, 7,48 para o ensino por objetivos operacionalizados com programação rígida e 7,29 para o ensino por objetivos operacionalizados em que os alunos tiveram liberdade de alguns dos objetivos educacionais. Fortes efeitos de interação foram detectados entre a variável Estratégia de Ensino e as variáveis Escores do Concurso Vestibular, Caracterização Sócio-Econômica e Cultural e Assiduidade, mostrando que, para algumas categorias de alunos, o ensino por objetivos operacionalizados tem rendimento significativamente maior que o ensino tradicional. Os resultados mostram que para algumas categorias a liberdade dada ao aluno para escolher alguns dos objetivos educacionais prejudica o seu nível de aproveitamento no curso, relativamente à mesma estratégia de ensino, porém, com programação totalmente fixada pelo professor. Mesmo nesses casos, o rendimento do ensino por objetivos operacionalizados revela-se superior ao do ensino tradicional.

Desempenho do aluno das classes de alfabetização funcional: influência da percepção

O propósito deste trabalho foi estudar a influência da percepção no desempenho do aluno das classes de alfabetização funcional, analisando para posteriores inferências as atitudes discentes apresentadas. Procura, também, examinar as características do aluno e a relação entre a percepção e algumas destas.

Desempenho e background familiar: um estudo no acesso a uma instituição de ensino técnico federal no Brasil

This paper comprises an investigation on the influence of the variable family backgrounds (father school level, mother school level and family income) over the pupil s performance in admissions examination (entrance test or PROITEC) at Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte (IFRN). From that point of view, the main goal of this research is to analyze the influence of the family background as a determiner of the pupil´s performance in the access to Technical and Professional education at IFRN. Secondary data were used from two databases (entrance test and PROITEC) adding up to 19.226 observations to the vacancies offered in the year of 2013. Aiming at achieving the proposed goal, a conceptual model composed of three hypothesis was developed. The results were presented in four stages: stage I presentation of the descriptive statistical results of the two databases; stage II separation of the campi in clusters; stage III analysis of multiple regressions; stage IV analysis of the logistics regressions. Two statistical tests were used to validate the hypothesis: T-test and Wald test. Hypothesis 1 and 2 were confirmed and H3 was refused. The results presented favorable causal connections to the family income and the father school level variables (with bigger effect for fathers with a higher education degree). The mother school level variable did not provide statistical significance for this research. Based on this result, after this work, this institution is to develop a strategic plan to assist in the success rate of students preparing diagnoses in order to diminish the effects of the variables that impacted negatively

Spontaneous Blinking in Patients With Graves' Upper Eyelid Retraction

Purpose: To describe spontaneous blink kinematics in Graves' upper eyelid retraction (UER).Methods: The magnetic search coil technique was used to record spontaneous blinks of 15 healthy subjects (aged 23-56 years, 15 eyelids) and 15 patients with Graves' UER (aged 22-62 years, 15 eyelids) during a 5-min period of video observation, and the signals were digitized at 200 Hz (12 bits). Overall, a total of 2,798 blinks were recorded for the controls and 1,860 for the patients. The distance between pupil center and upper eyelid margin in the primary position of gaze (MRD) was measured with the Image J software.Results: The blinking rate of patients was lower than that of control subjects, with a mean (+/-SEM) blinking rate (blinks/min) of 13.0 +/- 1.7 for patients and of 20.0 +/- 2.1 for the controls (t = 2.58, P = 0.016). There were no statistically significant differences in blink amplitude between controls (22.7 +/- 3.1 degrees) and Graves' patients (24.7 +/- 3.3 degrees). However, while only 22% of the blinks performed by controls were smaller than MRD, this rate was 78% for patients. In addition, in blinks larger than 25, patients showed lower down-phase velocity than controls.Conclusions: Patients with Graves' UER show reduced blinks rates and abnormal blink kinematics, which might be related to the development of exposure keratitis in this disease.

Alfabetizar crianças na escola pública: fazeres docentes em discussão

The most recent data of the Brazilian Test (BRAZIL, 2005) and of the SAEB (BRAZIL, 2007) have reaffirmed the serious situation of the Brazilian public school, where great part of the students, after to conclude 4º year of basic education, does not present minimum knowledge of reading and writing. In this picture, the situation of the state of Rio Grande do Norte, whose students had presented, in the last evaluation is particularly difficult, the worse performances of the country, in this area. The data also discloses that the failure pertaining to school, closely tied with the failure in the literacy, not only remains, as takes other aspects. In consequence of this picture, the literacy, even so widely argued in the last few decades, still instigates inquiries, as it is the case of this work. Our study got shaped due to reflections, as much to the theorizations to which we had access, as of the emergent questions of ours pedagogical practice. Through the past three decades, the studies in the area of literacy with the purpose to understand the constituent nature of the process, its aspects and its determinative ones has been intensified. The produced knowledge has contributed for the overcoming of the reductionist form as if it thought/thinks, in some contexts - this process. Such statements impel them to reflect concerning what is happening in the school, limiting or making possible the pertaining to school success. With these concerns, we delimit, as focus of study, the teaching action, having the following stunning question: What to make professors, in the context of the public school, to propitiate or hinder the process of literacy of the children? In this direction, our object of study is to make them professors who can propitiate or hinder the process of literacy of the children, in the context of the public school. The objective work to investigate, from practical of professors the teachers, that to make professors related to the literacy process - they can propitiate or hinder the learning of the written language, for the pupils of the public school, at the beginning of the school process. The work if inscribes in the qualitative boarding of research and if it configures as a case study, with characteristics of Research-Action, inspired by the following principles: authenticity and commitment and systematic restitution. For the retraction of the data, they had been used: half-structuralized interview; participant comment; meeting of studies and reflection; register in daily of field. We define as locus of study, a school of public net and, more specifically, a group of the initial years of school process that integrates the cycle of literacy . Of the five invited teachers, only one demonstrated interest in participating of the work. Its group of first year of the First Cycle of basic education is composed for 34 children, with ages between six the nine years. The data constructed by means of the described procedures, as well as its analysis, make possible to identify, between the many aspects and to make that they compose the pedagogical dynamics in the context of classroom, the following categories to make articulated with the literacy process: 1. To make of practical the relative ones to the planning, understood as To make relative: 1,1 distribution of the time-space/routine; 1.2 to the didactic activities and/or sequences and teaching interventions; 1.3 to the organization/election of the contents; 1.4 to the materials/didactic resources and 1.5 to the evaluation. 2. To make relative to the interaction professor-pupil, systemize in: 2.1 attention to the diversity; 2.2 to the affectivity. These to make, in the form as if materialized in the practical one observed, had been reflected, jointly with the teacher, as constituting parts of obstacles to a perspective of literacy. By means of the sharing of the reflections, anchored in theoretical conceptions concerning the practical one of teach-learning and, more specifically, of literacy, we register indications of new meanings of these to make on the part of the teacher in conducting them as providers of learning of its pupils, first purpose of its teaching performance. This finishing, possible synthesis at this moment is, therefore, point of fond and departure for new studies

Dos tempos de escola aso dias atuais reminiscências duradousras da experiência escolar

This study it treats on the marks of the school experience in the individuation process of the subject and has as general aim to know of that it forms these experiences, the spite of the curricular and pedagogical questions, influences this process. It searched to interpret the experiences strengthened during the school education and the trajectories of confrontation of the diverse situations lived in the school. It was tried,also,to understand the direction of the critical school events and equally as the familiar way can influence in the choices and formation of the citizens through the pedagogical investment. Furthermore, it was reflected on the reasons that had taken some to remain in the school environment are as student or, later, of the side of there ,as teacher. For in such a way, it realized a qualitative research with a phenomenological inspiration using narratives interviews carried with four subjects, from which if it identified the main characteristics, structure, conditions of origin, the social context, the school strategies, the forms as they had been managed and its consequences. The analysis of the stories clearly left two basic axles about the school experience that if detach in the constitution of the subjects: in a hand, the dynamics of the lived school environment left undeleted marks in the memory that had been determinative for the personal choices; on the other hand,the familiar reference, through its different forms of pedagogical investment,had a decisive influence. The agreed marks of the school and the family had left an important legacy for formation of the subjects and the choices that had made during their lives, especially in the aiming of its professional careers. Invariably, it was perceived in the inquiry, that much of the pupil who if was persists in the adult and professional of today. Thus, the school I it s part of professional I that it exists in each one. The citizen, the person and the professional are derived from the processes of socialization and individuation, which to a large extent are defined during the school life. And it s with the use of this school capital , acquired in the school times, that we have conditions to develop the many social roles in the current days

Objetos de aprendizagem e alfabetização: a proposição de um encontro

This study investigates the development of Learning Objects for the literacy of children. It aims to know based in the notion of literacy teachers the main factors of academic failure in literacy and researching in Brazil, as well as identify relevant activities in the literacy process of children to support the creation of a set of Learning Objects. Refers to an exploratory research, which is configured as a qualitative nature case study, inspired in part in an action-research described by Thiollent (2003), conducted with ten early grades elementary school teachers of a public municipal school in Parnamirim / RN. As methodological options for data collection uses questionnaires and focuses on the group of teachers, analyzing the data, referring back to the ideas by Szymanski (2001; 2008) and content analysis, guided by Bardin (2002). The development of Learning Objects, follows the steps of development suggested by Garrett (2000). Rules in its multidisciplinary theoretical reference and promotes a conceptual dialogue on: Literacy; Literacy School Failure; Pedagogical Practice in Literacy; Thoughts and Language; Multimedia and Hypermedia; Learning Objects. Perceives that the act of education in literacy as an act of love, courage and social interaction between individuals - educator and pupil, so there is ownership of the object of knowledge in the relations with the world and with the experience, through a pedagogical practice that assumes all different knowledges, the moral political ideal, the mindsets of the students, and can make use of teaching materials that supports the learning process and are consistent with the educational objectives (FREIRE, 1998; FREINET, 1976; VYGOTSKY, 1998; FERREIRO AND TEBEROSKY, 1985; JONASSEN, 2000; WILEY, 2001). Figures out, through the teachers' opinions, five reasons for school failure in literacy, three inside the school environment: teacher; academic assistant and principal; student, and two outside the school environment: parents/family; government and public management. Presents a set of Learning Objects, based on the constructivist thought, developed from the identification of activities considered relevant by teachers in literacy's teaching and learning process. Suggests the use of Learning Objects as pedagogical practice in literacy as a digital resource that supports learning and can trigger important cognitive processes for the acquisition of reading and writing skills in the school environment

Avaliar na alfabetização: uma reflexão sobre as dificuldades docentes

Our work leads up to the context of evaluation during alphabetization process as a moment of an educational action cycle that requires planning, teaching and learning of reading and writing. It aimed to research the difficulties lived by teachers of a public elementary school during the specific task of evaluating children in the alphabetization process. This qualitative research took place as a case study at Emília Ramos Municipal School, in Natal, capital city of Rio Grande do Norte State, Brazil. Semi-structured interview and questionnaire were used as fact-gathering proceedings. Two pedagogical advisers and seven teachers formed the group of research subjects. All of them worked with elementary school first cycle classes, in that school, in the year of 2003. The analysis shows that teachers difficulties concern to theoretic questions of conceptual and methodological orders, although these questions indicate an important knowledge of teachers about alphabetization and evaluation. Our reflection about these problems articulates two points: alphabetization and evaluation. Concerning alphabetization, we took reference on Psychogenetic studies of Ferreiro and Teberosky (1985) which emphasizes fundamental points for a coherent evaluation practice: a) objective knowledge is not a beginning data; it is a construction process, which the learner does not conquest step by step on a linear way; b) objective knowledge acquisition happens through a global re-construction, and some of them may seem mistakes if we consider conventional writing but these mistakes are constructive and necessary. We also took reference on Interactionist-constructivist theory. Here, Vygotsky (1984) proposes that writing must be specially understood as language, symbolical activity, cultural practice. So, acquisition of writing process, as language learning, must be understood as a development of abilities relative to symbolical and communicative activity of sense production. On this way, Hoffmann (1994) advises that is necessary to overtake current evaluation practices, limited by their terminality character, only pointing right or wrong questions. According to a new paradigm, valuation appears as one of the mediations by which teachers must indicate re-ordination of pupil s knowledge, and re-organize their own practices too. The comprehensions of these questions plays decisive part in order to overtake our difficulties in evaluating. Besides, it points a way to build a coherent valuate practice, with an emancipating character and able to create new teaching-and-learning situations, leading to a better alphabetization Pedagogy

Educação do campo e alternância :reflexões sobre uma experiência na Transamazônica/Pará

The study theme is the Rural Familiar House Program (RFHP), through the Rural Familiar House of Uruará-PA city (URFH), from 2000 to 2005. It is considered as base the education offered to the field young people, in the modality of basic education by alternation methodology between the Familiar and School Times in the two first from 5th to 8th grade classrooms. From the argument about the understanding importance and need of knowledge transmission and construction to be established in the inter-section between general references of the social reality and the subjective ones. It constitutes an educative work that both values domain of knowing and the creative capacity of each pupil. Considering that the greatest aim of the education is the human being emancipation, this thematic for the development of the documentary and field research was defined with the delimitated thematic for the educative practice-proposal in alternation, choosing the Program of the RFHs as the reference to carry out an analysis which considered fruitful in the articulation between education and educative work. This study had the objective to contribute for the debate concerning the alternation and to understand presuposals and educative practice of the RFHs what its importance for the young people and its relation with the field educational policy. For this, it was used, mainly, from analytical references of authors, such as Williams, Gramsci, Adorno, Freire, Shiva, Soares, Molina, Tonet, et. all, all were also important for the construction of this work. The studied documentary sources, as well as the verbal ones the actors also interviewed had allowed, in irreplaceable way and significantly, a critical analysis on the pedagogical proposals and the articulation among school, familiar work and education, which was carried out in the formation of URFH, the sessions of alternation between Time School and Time Family. The results are scored with the chapter construction, as they had presented themselves in several sources and the reading which was made. A reading that signals for the affirmation which is possible to overtake the emphasis on technicality, mediated in the practice-theory-practice relation, still present in the alternation, and, thus, to be able to make an educative work that intends to contribute for the young people education with capacity of being, thinking and to act actually as subjects of their history

Tornar-se professor formador pela experiência formadora: vivências e escritas de si

This thesis describes and analyzes the trajectory of education of an educator-teacher group to become tutor of memorials (final work of the course Normal Superior in Instituto de Educação superior President Kennedy IFESP-Natal-RN). The writing of memorials (self-biographical writing) propitiates to the pupil that writes a reflection on his/her student and professional life, and to whom guides an evolution in his/her professional education. From the methodological point of view, we adopt an etnomethodological perspective of qualitative approach which describes the reality of real citizens inserted in a real situation of education. It is constituted of participants of the research of 32 educator-teachers, deriving of three different areas of academic formation. The instruments of data collection consist of eight life histories, 32 contextualization applications of the participants of the research, interviews with two consultants of the project, as well as some documents. The results of the analyses put in evidence that the education of the educator-teacher goes for two parallel ways: the first deals with the experiences, interactions and elements of daily practice; the second with the academy experiences where the educator-teacher searches the post-graduation courses. The integration of these two ways defines the educator-teacher identity with foundation in knowings that constitute in the exercise of guidance of memorials. The teachers knowings are considered insufficient by the majority and others knowings are mobilized to the knowing to be educator-teacher, memorial tutor. The thesis concludes that the trajectory of the educator-teacher constitutes an educator experience, in the direction of that implies an articulation among the learnings, abilities and knowings, to support the pupil in self-discovery, and that these multiple experiences favor the education of these teachers

EJA: saberes na articulação curricular da Escola Municipal Professor Amadeu Araújo

The target of this paper is to investigate the possibilities of inscribing into the EJA curriculum the knowledge detected in the neighborhood of a school if the point of view of the student body regarding the basic schooling deserves its due consideration. The empirical field of our research focuses on the elementary school of professor Amadeu Araújo Municipal School in Natal. Our investigative course tried to understand the way pupils think the curriculum contents of knowledge spread around the school from the vision furnished by their elementary school. With this, we hoped to develop a creative understanding concerning that question. Then we reviewed, along the debate, questions related to Nova Natal Housing Estate and its historic, social and cultural beginnings taking in account the participants memories of this research and their suggestions concerning the utility of the community knowledge to the curriculum practices. This project is supplied by the qualitative research and reinforced by the Focal Group s methodological procedures and semi-structured interviews. This procedure allowed us to discern different points of viewing, feeling and understanding in the complexity of the daily life around school and its environment. With these elements, we could note that some students perceptions pointed to a basic schooling fomented by traditionalized pedagogical practices in which teacher and pupil seldom dialogue with each other, what corroborates the impression of undervaluation of the pupil s role. Consequently, the nets of knowledge waved around the school in Nova Natal Housing Estate become useless, when they could be of great utility if inserted in the curriculum contents

Um ensaio sobre as concepções de professores de Matemática: possibilidades metodológicas e um exercício de pesquisa

Este artigo tem como tema principal as concepções dos professores de Matemática. Considerando o termo concepção a partir do pragmatismo de Peirce, elabora-se um conjunto de parâmetros metodológicos - chamado de método indireto - a ser aplicado no estudo das concepções de professores de Matemática. Trata-se, em síntese, de investigar as concepções dos professores interpelando-os não sobre suas crenças, mas sobre suas práticas. Fundamentando essa abordagem indireta e explicitando-a em sua natureza qualitativa, o artigo segue apresentando, como exemplo, um exercício desse método indireto: um estudo sobre os critérios que os professores utilizam quando escolhem livros-texto para sua sala de aula, abordando, conseqüentemente, quais concepções de Matemática e de seu ensino e aprendizagem tais critérios desvendam. Partindo de depoimentos de professores de Matemática, o estudo indica que os professores agem com certa independência quando escolhem os materiais utilizados em suas atividades docentes. Buscam, ao mesmo tempo, apoio em uma vasta gama de livros didáticos, desconsiderando as particularidades de cada obra e as abordagens e perspectivas defendidas por seus autores. Embora submetam-se ao livro didático - considerado uma referência legítima e segura -, os professores o subvertem, buscando adequá-lo ao que consideram correto. Dessa constatação, algumas das concepções dos professores podem ser realçadas: o aluno, via de regra, é avaliado e classificado pelas lacunas que apresenta em relação aos conteúdos. Dessa postura, segue a valorização da precedência lógica dos conteúdos, de sua apresentação linear, e a defesa de pré-requisitos que viabilizariam o ensino e, conseqüentemente, implicam a legitimidade de aulas predominantemente expositivas.

Aspectos anatômicos do olho e neuroquímicos da retina do mocó (Kerodon rupestris)

The visual system is an important link between the animal and the environment, com profound influences on the habits and lifestyle in various habitats. Adaptive mechanismsto the temporal niche are present in the visual system of many vertebrates, involving changins in ocular dimensios and design, retinal cell distribution and organization of neurochemical circuits related to the retinal resolution or sensitivity. The sensory system of the eye is represented by the retina, whose organization is responsible by receipty, initial analysis, and transmission of the information to the brain. The knowledge of the position of the eyes in the head and the distribution of retinal cells allow to identify adaptive aspects of each species to its visual field, which is characteristic to the ecological niche it occupies. In this research, we study eye anatomical characteristics and retina neurochemical features of the rock cavy (Kerodon rupestris), a tipical Brazilian rodent from the suborder Hystricomorpha, family Caviidae. The rock cavy has lateral eyes well constitute bony orbit and well differentiated extrinsic muscle. The study of the descriptive and morphometric anatomy of the showed mean values of axial diameter 10.7±0,5mm and equatorial diameter 11.6±0.7mm. The pupil is slit shaped and the lens has mean axial diameter 5.4±0.03 mm, corresponding to ~45% of the axial diameter of the eye. The posterior nodal distance and the retinal magnification factor were estimated at 6.74 mm e 118 μm/grau, respectively. Flat mounts were processed for Nissl stain, and the topographic distribution of ganglion cells showed a moderate visual band, just below the optic disc, with higher density in the ventral retina. Retinal vertical sections and flat mounts were processed for immunohistochemistry to visualize tyrosine hydroxilase (TH) and thus two types of TH+ cells were detected. Type 1 cells had strong TH-immunoreactivity, the body cell varied from 120.047 to 269.373 μm2 stratifying in the sublamina 1 of the IPL. Type 2 cells were weakly TH-imunoreactive, had cell body located mostly in the IPL, varying from 54.848 to 177.142 μm2, constituting ~10% of the TH+ cells. Both cell types exhibited similar topographic distribution with higher density found in a horizontal band along of the naso-temporal axis in the dorsal retina. The total population of dopaminergic cells was 2,156±469,4 cells, occupying an average area of 198,164 μm2. The presence of cones and rods was detected by immunohistochemistry in vertical sections and flat mounts. S cones density is around 10 times smaller than L cones, with different degree of spatial organization. Other retinal neuronal populations of the rock cavy were also detected in vertical sections with specific markers. Comparative analysis of the anatomical characteristics of the rock cavy eye 12 suggest that it was designed to acquire higher sensitivity to light, at expense of image sharpness, compatible with a vision at mesopic conditions. Additionally, the distribution of the 2 subtypes of dopaminergic cells in a naso-temporal band in the dorsal retina seems suitable to a gain in sensitivity, coherent with an animal with predominantly crepuscular activity pattern