Velichkovsky, Boris B.

Relevance. The musical activity of a professional pianist has been little studied by objective methods. For most musicians, the task of sight-reading causes a difficulty in both academic and professional activities. Understanding the visual-motor mechanisms and cognitive processes involved in the implementation of sight-reading can help musical pedagogical practice. There are few sight-reading studies and most of them were conducted in conditions far from the real ones. This work is interdisciplinary that involved the interests of musical pedagogy, psychology and physiology.

Objective. On the base of the cognitive task of sight-reading music in conditions close to reality to explore the interaction of visual-motor parameters and their relationship with the parameters of the working memory.

Methods. 55 subjects aged 18–25 years (30 pianists and 25 non-pianists) were tested using the OS and N-back method to determine individual parameters of the working memory, as well as to determine the time of a complex visual-motor response. Eye tracking method was utilized for eye movement recording when the pianists sight read sheet of notes.

Results.The visual-motor performance parameters (eye hand span, errors and regressions) differ significantly at sight-reading musical fragments of varying complexity. Compared with the literature data we obtained opposite results for value of the eye hand span depending on the complexity of the musical text. We revealed correlations between the visual-motor parameters and the working memory parameters as well as their dependence on the quality of performance.

Conclusion. Objectively recorded visual-motor parameters complexly interact with each other. The mastery of sight-reading music of professional pianists closely related with individual parameters of the working memory.

Relevance. The study of human functional states within the structural-functional approach is an important development in work psychology. As work becomes more intensive and cognitive, the study of mental fatigue becomes more important.

Objective. To validate cognitive tests for the assessment of mental fatigue cognitive effects, and to replicate cognitive effects of fatigue observed within the structural-functional approach.

Methodology. 27 subjects (18 male), engineers in a high-tech engineering firm, and took part in the study conducted over a working day in the morning and in the evening. Mental fatigue was assessed with a questionnaire. The cognitive tests included a test of attention switching, a test for working memory, and the Sternberg’s short-term memory search task.

Results. A reduction in attention switching and memory search efficiency was found. These results in a good concordance with previous results and indicate a reduction in the availability of top-down cognitive control resources. Evidence was found for transition towards sequential self-terminating memory search strategy under mental fatigue. No reduced working memory was found, which may be related to the meta-cognitive regulation of functional states.

Conclusions. Mental fatigue is associated with a reduction in the control of attention and short-term memory, related to the depletion of cognitive control resources. Individual cognitive reactions to fatigue are important. Future developments of the structural-functional approach may include the development of new diagnostics tools, the usage of cognitive modeling, the orientation to the analysis of the individual differences, and the integration of the structural-functional approach with resource approaches to cognition.

The phenomenon of presence is the subjective sense of realistic interaction with the virtual environment. Presence is an important factor in the effectiveness of the use of virtual reality systems. On the occurrence and severity of presence phenomenon influenced by both technological and psychological factors, including cognitive control. Special influence on the emergence of the phenomenon of presence can have a system of monitoring and correction of errors associated with detection and neutralization of differences between expected and actual results of the cognitive activities. It examined the extent to which the effectiveness of monitoring and error correction (estimated through the effects of slowing down after an error and adapt to the conflict) is related to the aspects of the presence phenomenon. For high-immersive (CAVE) and lowimmersive (standard display) environments, it was shown that (1) efficient error correction prevents the negative physical effects associated with the working in a virtual environment, and (2) effective detection of cognitive conflicts prevent the emergence of the phenomenon of presence through detecting unnatural virtual scenario. In low-immersive environment conflict detection also prevented the formation of emotional involvement in a virtual scenario.

Correlations between various classes of working memory tasks (working memory span tasks, updating tasks) were analyzed. Tasks that share processing and storage requirements correlated with each other. A three factor structure was extracted compatible with the existence of three components within working memory: focus of attention, region of direct access, and activated memory. The data shows that processing and storage are independent in working memory and that storage in working memory is based on two storage systems — one that uses short-term memory mechanisms and one that uses long-term memory mechanisms.

Reliable identification of intentional visual commands is a major problem in the development of eye-movements based user interfaces. This work suggests that the presence of focal visual fixations is indicative of visual commands. Two experiments are described which assessed the effectiveness of this approach in a simple gaze-control interface. Identification accuracy was shown to match that of the commonly used dwell time method. Using focal fixations led to less visual fatigue and higher speed of work. Perspectives of using focal fixations for identification of visual commands in various kinds of eye-movements based interfaces are discussed.

The paper shows the possibility of assessing the level of resistance to stress through the integration of information on the specifics of the difficult situation and available resources of coping. When describing the individual process of adaptation to stress is a systematic distinction between mental states and stable personality dispositions. Picked up a set of diagnostic methods, empirical verification which is carried out by comparing the samples of subjects (N=530), a priori contrast in level of resistance to stress.