The regularities of visual perception of both complex and ecologically valid objects during extremely short photo expositions are studied. Images of a person experiencing basic emotions were displayed for as low as 14 ms amidst a saccade spanning 10 degrees of visual angle. The observers had a main task to recognize the emotion depicted, and a secondary task to point at the perceived location of the photo on the screen. It is shown that probability of correct recognition of emotion is above chance (0.62), and that it depends on its type. False localizations of stimuli and their compression in the direction of the saccade were also observed. According to the acquired data, complex environmentally valid objects are perceived differently during saccades in comparison to isolated dots, lines or gratings. The rhythmic structure of oculomotor activity (fixation–saccade–fixation) does not violate the continuity of the visual processing. The perceptual genesis of facial expressions does not take place only during gaze fixation, but also during peak speed of rapid eye movements both at the center and in closest proximity of the visual acuity area.

Extreme temporal condition for visual identification task is held. A gaze-contingent eyetracking study was used to assess how presaccadic stimulus influences the one presented during a reactive saccade. A strong forward masking effect is found. Identification rate of second image is below chance, but still in accordance with previous studies, where no masking was present. Identification rate, erratic responses, statistical connection with alternative response (2AFC task), physical properties of saccades are similar to simple intrasaccadic identification task [3; 5]. Two aspects of transsaccadic visual perception were hypothesized, possessing common temporal structure: sensoric (geometric primitive detection) and gnostical (naturalistically valid object identification).

I-BDT eyetracking data ternary classification (fixations, saccades, smooth pursuit) algorithm is investigated. Comparison with well-known Identification / Dispersion Threshold (I-DT) algorithm is held (accuracy, precision, recall, F1 measure). A novel approach for additionally filtering the algorithm output by distance/amplitude, area of convex hull is described.

This article contributes to the development of multichannel linguistics — a new approach that explores the interaction of multiple informational channels between interlocutors, including verbal units, prosody, gestures, facial expressions, direction of gaze. The study was carried out on the material of the Russian multichannel resource “Russian pear chats and stories”, collected with the help of modern equipment, including industrial video cameras and eyetrackers for registering eye movements. Based on the quantitative and qualitative results of the study, the authors describe the distribution of visual attention of the Narrator in the situation of perception of information from two gesticulating interlocutors, as well as various styles of oculomotor activity of the Narrator.

Context and relevance. Notion of functional blindness during saccadic eye movements makes heavy influence upon theory of visual perception. Lack of systemic and comparative studies of the subject played an important role for the problem. Many authors build theories based on assumptions that effects of saccadic suppression cover stimuli of any possible category and with no relation to multiple psychophysical factors. We deepen knowledge inside this discipline through wide selection of quasi-experiments involving identification levels of objects of various content strictly during saccades. Objective: to prove that visual perception retains efficiency during saccades. Hypothesis. Stimulus duration inside saccadic interval is a crucial determinant of successful identification. Methods and materials. 96 subjects took participation in this experiment (91% female), of age 18—55 years (median 21). An eyetracking study measuring identification levels in a 2-alternative forced-choice task was held. Eyetracker was providing eye movement data, but also used as reliable trigger of an ongoing saccade. Results. We report effect of stimulus duration versus identification levels during saccades, while comparing results between three different categories of stimuli. Conclusions. Saccadic suppression cannot be caused by dichotomic fade out of visual ability, instead, it is a byproduct of perception during eye movement as such, which heavily depends on stimulus type, its characteristics and duration of exposition.