Digitization and transmission of human experience

Transmission of human experience is essential for many purposes. It has two aspects: content and social relations. Digital technologies can solve some of the classic issues around the capture and transmission of human experience. Using these new technical affordances as a basis, this article presents a framework to capture and describe human activity and experience based on video and cooperative explicitation of activity trajectories with the subject, using a transition model inspired by the formalism of dynamical systems. The article also introduces this special issue, 'Digitize and Transfer', and gives an overview of its contents

Fast psychomotor functioning in anorexia nervosa: Effect of weight restoration

Item does not contain fulltextIn a previous study young seriously underweight anorexia nervosa (AN) patients in the early phase of treatment were found to react faster in psychomotor tasks. To further understand this finding we studied the impact of weight restoration on the performance of AN patients in drawing and copying tasks. A group of 17 female AN patients, aged 14 to 25, was compared with 17 healthy controls, matched for sex, age and educational level. Patients were tested when severely underweight and after weight restoration. Control subjects were also tested twice. Using computerized recording and analysis of writing and drawing behavior, reaction times and drawing times were derived, while cognitive and motor demands were manipulated. Overall, AN patients showed shorter reaction times in copying tasks and shorter drawing time in the drawing task than normal controls, and this pattern persisted after weight restoration. No significant group (AN vs. controls) by session (test vs. retest) effect emerged. The finding of a consistent pattern of shorter reaction and drawing times in AN patients before and after weight restoration is compatible with a personality characteristic of perfectionism and overachievement in AN patients

Application of zebrafish oculomotor behavior to model human disorders

To ensure high acuity vision, eye movements have to be controlled with astonishing precision by the oculomotor system. Many human diseases can lead to abnormal eye movements, typically of the involuntary oscillatory eye movements type called nystagmus. Such nystagmus can be congenital (infantile) or acquired later in life. Although the resulting eye movements are well characterized, there is only little information about the underlying etiology. This is in part owing to the lack of appropriate animal models. In this review article, we describe how the zebrafish with its quick maturing visual system can be used to model oculomotor pathologies. We compare the characteristics and assessment of human and zebrafish eye movements. We describe the oculomotor properties of the zebrafish mutant belladonna, which has non-crossing optical fibers, and is a particularly informative model for human oculomotor deficits. This mutant displays a reverse optokinetic response, spontaneous oscillations that closely mimic human congenital nystagmus and abnormal motor behavior linked to circular vection