Background. The work purpose was in the description of the mathematical analysis method of optic-spatial mnestic processes in students at interaction with the computer. Methods. 126 students at the age from 17 till 37 years old of different courses of internal and correspondence branches have taken part in the research (78 female and 48 - male). Middle age of the female examinees was 22.67 years, male’s - 21.58 years old. Students played the position computer game. The parametres quantitatively characterising the short-term components of working memory in three sessions of game were estimated. Results. The quantity of spatially-visions placed in the short-term incidental buffer in 72 % of examinees did not exceed three. Only in 3 % of cases the quantity of the cognitive references was within 4-6, Conclusions. The received results in general are coordinated with the multicomponent model of working memory. In the course of the computer game students used its short-term components. The quantity of spatially-visions placed in the short-term incidental buffer of memory in 96 % of students does not exceed four.