Visual perception of movement kinematics and the acquisition of "action prototypes"

Recognizing a class of movements as belonging to a "nominal" action category, such as walking, running, or throwing, is a fundamental human ability. Three experiments were undertaken to test the hypothesis that common ("prototypical") features of moving displays could be learned by observation. Participants viewed moving stick-figure displays resembling forearm flexion movements in the saggital plane. Four displays (presentation displays) were first presented in which one or more movement dimensions were combined with 2 respective cues: direction (up, down), speed (fast, slow), and extent (long, short). Eight test displays were then shown, and the observer indicated whether each test display was like or unlike those previously seen. The results showed that without corrective feedback, a single cue (e.g., up or down) could be correctly recognized, on average, with the proportion correct between .66 and .87. When two cues were manipulated (e.g., up and slow), recognition accuracy remained high, ranging between .72 and .89. Three-cue displays were also easily identified. These results provide the first empirical demonstration of action-prototype learning for categories of human action and show how apparently complex kinematic patterns can be categorized in terms of common features or cues. It was also shown that probability of correct recognition of kinematic properties was reduced when the set of 4 presentation displays were more variable with respect to their shared kinematic property, such as speed or amplitude. Finally, while not conclusive, the results (from 2 of the 3 experiments) did suggest that similarity (or "likeness") with respect to a common kinematic property (or properties) is more easily recognized than dissimilarity.

Performance and narrative, bodies and movement in the construction of places and objects, spaces and knowledges: The case of the Maltese megaliths

The article explores the ways knowledge and space are co-produced performatively through bodily movement in an examination of the Maltese megaliths the first complex stone structures in the world. It is argued that knowledge is best seen as spatialized narratives of human actions and objects as materialized forms of those spatial narratives. Rewriting our social and historical narratives so that the performativity of place, space and knowledge is restored opens new possibilities for rethinking the social and material order.

Pharmaceuticals and the consumer movement: the ambivalences of 'patient power'

Consumer and patient advocacy groups (PAGs) are important participants in the politics of pharmaceuticals. Yet very little is known about the precise nature and extent of their influence. It is argued in this article that PAGs fulfil a mixed role within the health system at national and transnational levels, and that they are at times fully incorporated into economic and political power structures. Their frequent dependence on pharma industry funding is of particular concern. PAGs provide a means of direct industry interaction with the final customer, thereby partially bypassing and putting additional pressure on doctors and regulators. The article presents the case for research to establish a better empirical base for discussions about the role of PAGs within contemporary neo-liberal governance structures.

Mystery and movement: doing more with dominoes

John Gough explains how to turn an ordinary set of dominoes into games of mystery, movement and strategy.

Social-movement unionism in theory and in Sweden

Many union leaders and observers of unionism in industrially advanced countries have recently argued for stronger links between unions and social movements but their arguments leave the nature of social movements underspecified. This article reviews the literature on social movements and argues in favour of a minimalist theory of the social actor rather than choose between American and European approaches to studying social movements. Both Melucci's European approach and McAdam, Tarrow, and Tilly's American approach to integrating the European and American schools of thought on social movements are inadequate to the task of specifying social-movement unionism. Hindess's minimalist theory of the social actor and articulated arenas of conflict offers a stronger approach to understanding social-movement unionism and appreciating its strategic pertinence in particular times and places. Two episodes of contention in Sweden illustrate the advantages of a minimalist theory of articulated social-movement unionism.

Social movement unionism and networked technology

From a European perspective, the wide-ranging social, economic, and political effects of networked computers have generated tensions between 'new' social movements and the 'old' labour movement. From an American perspective on social movements, there is no such tension between old and new social movements. A study of social-movement unionism in Sweden offers a interesting means of testing this emerging American perspective against the European perspective because the labour movement has long been particularly effective and networked technology has been embraced whole-heartedly throughout all aspects of the society, the economy, and the polity. The paper introduces the contrasting European and American perspectives on social movements and presents examples of the practice of social-movement unionism among Swedish social democrats, unionists, and diverse local activists. These examples support conclusions that eschew utopian theories of 'cyberunionism' in favour of developing a theory of articulated unionism in which local unions branches articulate vertically with national and global union bodies, and articulate horizontally with social movements in other arenas of conflict.

Mega-events and the "Showcase" effect: investigating the moderating influence of exposure to the 2004 Olympic games telecast and interest in the Olympic movement- an Australian perspective

Survey-based research explored the moderating effects of "exposure" to the Australian free-to-air telecast of Athens 2004 and "interest" in Olympic Games in developing behavioral intentions to visit Greece in the future. Differences were found between groups with low and high levels of exposure to the telecast, and also between groups with high levels of interest in the Olympic Games, but these were only marginal. When the combinatorial influences of these two variables were considered simultaneously, their effects were generally synergistic. The article calls for further research on this area of mega-events, as the results, while of significance, provide food to continue the broader debate on the role of mega-events in developing tourism to their host destinations after their staging.

A structural events approach to examining long-term change in the Australian trade union movement, 1969-1996

Traditional studies of long-term change in trade union structure have predominantly focused on aggregate trends in union merger activity, in constructing explanations of change. This paper argues that our understanding of structural change in the Australian trade union movement would be better served by a structural events approach that examines the incidence of union formations, dissolutions, and breakaways, in addition to that of union mergers. In doing so, it outlines how these structural events can be identified and measured, and presents the preliminary findings from the methods application.

The development of cultural entrepreneurs through new venture cases in the business classroom

Artists and workers in the creative industries who embody the essence of creativity are thwart by economic values in delivering their art work or creative concept to consumers. This is particularly evident for students in courses in creative industries who graduate with entrepreneurial aspirations, but not the means to pitch their creative concept or build the business model for the new venture. This paper analyses a university business course developed to take cultural entrepreneurs through venture building as a live case in the creative economy.

Internal representation of movement in children with developmental coordination disorder : a mental rotation task

Recent studies show that children with developmental coordination disorder (DCD) have difficulties in generating an accurate visuospatial representation of an intended action, which are shown by deficits in motor imagery. This study sought to test this hypothesis further using a mental rotation paradigm. It was predicted that children with DCD would not conform to the typical pattern of responding when required to imagine movement of their limbs. Participants included 16 children with DCD and 18 control children; mean age for the DCD group was 10 years 4 months, and for controls 10 years. The task required children to judge the handedness of single-hand images that were presented at angles between 0° and 180° at 45° intervals in either direction. Results were broadly consistent with the hypothesis above. Responses of the control children conformed to the typical pattern of mental rotation: a moderate trade-off between response time and angle of rotation. The response pattern for the DCD group was less typical, with a small trade-off function. Response accuracy did not differ between groups. It was suggested that children with DCD, unlike controls, do not automatically enlist motor imagery when performing mental rotation, but rely on an alternative object-based strategy that preserves speed and accuracy. This occurs because these children manifest a reduced ability to make imagined transformations from an egocentric or first-person perspective.

The free Aceh movement : Islam and democratisation

The Free Aceh Movement (GAM) has been characterised by some observers and the Indonesian government as being a radical Islamic organisation intent on establishing an Islamic state in northern Sumatra. This article explores GAM's relationship with Islam and shows that while GAM members are devout Muslims and that Islam pervades their political thinking, the organisation and its members are explicitly opposed to the creation of an Islamic state or the imposition of Islamic law. The article reports how senior members of GAM's hierarchy discuss their personal relationship with Islam, noting consistencies and differences in their approaches. A common theme is that Islam provides a motive for the struggle, based on notions of justice and equality, and that these and related aspects of Acehnese political organisation provide the groundwork for a functional form of democracy in Aceh's post-peace settlement environment.

The Movement of the Gastrop Littorina Littorea in the Intertidal Zone during the Onset of Winter

The movement of the snail Littorina littoreaon the North Atlantic coast is poorly understood. Most research has concentrated on the vertical distribution of the snail, and suggests that it prefers the low intertidal zone where its food source is most plentiful. In the winter, this distribution is reinforced by a documented seaward migration of snails from the high intertidal zone in response to falling temperatures. From October 14, 2006 to January 22, 2007, I examined the individual movements and recovery of snails in response to the onset of winter. I proposed that falling water and air temperatures drive the majority of snail movement within the intertidal zone, and that water temperature had the greater effect. I also examined the possibility that, in addition to a seaward migration, winter weather patterns in the Gulf of Maine and their effect on the ocean may encourage the wintertime vertical distribution of snails. Finally, I examined the possibility that populations of snails in the comparatively inhospitable high intertidal zone may endure the winter if given access to proper resources.

A simplified stroke rehabilitation assessment of movement instrument

Background and Purpose. An efficient, reliable, and valid instrument for assessing motor function in patients with stroke is needed by both clinicians and researchers. To improve administration efficiency, we applied the multidimensional Rasch model to the 30-item, 3-subscale Stroke Rehabilitation Assessment of Movement (STREAM) instrument to produce a concise, reliable, and valid instrument (simplified STREAM [S-STREAM]) for measuring motor function in patients with stroke. Subjects and Methods. The STREAM (consisting of 3 subscales: upper-limb movements, lower-limb movements, and mobility) was administered to 351 subjects with first stroke occurrence and a median time after stroke of 19.5 months. The unidimensionality of each subscale of the STREAM first was verified with unidimensional Rasch analysis. Each subscale of the STREAM then was simplified by deleting redundant items on the basis of expert opinion and the results of the Rasch analysis. The Rasch reliability of the S-STREAM and the concurrent validity of the S-STREAM with the STREAM were examined with multidimensional Rasch analysis and the intraclass correlation coefficient (ICC), respectively. Results. After deleting the items that did not fit the Rasch model, we found that the 8-item upper-limb movement subscale, the 9-item lower-limb movement subscale, and the 10-item mobility subscale assessed single, unidimensional upper-limb movements, lower-limb movements, and mobility, respectively. We selected 5 items from each subscale to construct the S-STREAM and found that the reliability of each subscale of the resulting simplified instrument was high (Rasch reliability coefficients of [greater than or equal to] .91). The agreement between the subscale scores (Rasch estimates) of the S-STREAM and those of the STREAM was excellent (ICC of [greater than or equal to] .99, with a lower limit for the 95% confidence interval of [greater than or equal to] .985), indicating good concurrent validity of the S-STREAM with the STREAM. Discussion and Conclusion. The S-STREAM demonstrates high Rasch reliability, unidimensionality, and concurrent validity with the STREAM in patients with stroke. Furthermore, the S-STREAM is efficient to administer, as it consists of only half the number of items in the original STREAM. Additional studies to examine other psychometric properties (eg, predictive validity and responsiveness) of the S-STREAM or its psychometric properties in various recovery stages after stroke are needed to further establish its utility in both clinical and research settings.