[INDIVIDUAL FEATURES VIEWING EMOTIONALLY MEANINGFUL IMAGES].

The data on the individual features of eye movements during viewing affective images from IAPS have been presented. The results suggest that the nature of the viewing of the trajectories for each subject (n = 20) is saved at a presentation of images with different emotional content. All examinees showed a significant correlation between the number of tests in which detected a region of interest, in three combinations: between negative and positive images, negative and neutral, neutral and positive (r = 0.84; 0.78 and 0.77 respectively). A similar correlation was found for the fixation duration (r = 0.90; 0.82; 0.90). It is shown that the number of points of fixation in the areas of interest, the area of the field viewing and the fixation duration significantly different between the two groups examinees (with a predominance of focal or scanning inspection trajectories). The possibility of using emotionally meaningful images to evaluate the dominaте type of visual attention on the parameters of eye movements of a particular person is discussed.

[Changes in the Spectral Characteristics of EEG during Neurofeedback Training].

We used the ratio of spectral characteristics of the EEG alpha and beta frequencies recorded in 10 apparently healthy subjects (university students) to control a computer cursor in the graphic interface in three scenarios with the use of neurofeedback. Our results showed that the scenario which uses the power of alpha- and beta-2-frequencies provided the highest accuracy and the best speed control. The parameters of beta-1-frequency were found to be less effective since an increase or a decrease of their power could result from an increase or a decrease of the power of alpha- and beta-2-frequencies. However, the subjects got the skill of cursor control with efficiency of 81%, gradually growing during learning, after a relatively short period of time (5 trainings per 2 weeks).

[DYNAMICS OF GAZE FIXATION DURATION AND EVENT RELATED POTENTIALS WHILE PRESENTATION FADING-IN IMAGES AND DISTRACTORS].

A method for studying the dynamics of human visual attention at various stages of image viewing and recognition has been described. The method is based on the presentation of fading-in images and distractors into the foveal part of visual field. Experimental data demonstrate the effect of habituation to the distractor and bimodal distribution of fixation duration in trials with distractor. It is shown that the effect of distractor is dependent on the complexity of the target images. Significant decrease of the latency of component P350 of fixation related potentials while the simultaneous presentation of target images and distractors is detected in the most of EEG recordings except the occipital ones. On the base of the results obtained the development of tests for evaluation of the current state of visual attention of human-operators, whose main current activities must not be disturbed, has been considered.