Abstract: the article is devoted to the study of psychophysical characteristics of drug addicted people and those addicted to the Internet in the context of a comparative analysis of pupillometric data (features of pupillary reaction, and light flash) using a single-factor analysis of variance ANOVA adjusted for multiple Bonferroni comparisons. A theoretical review of the literature on addiction problems is given. According to researchers, addiction to both chemical and non-chemical nature has common mechanisms of formation and symptom complex. Based on the understanding of the biopsychosocial nature of addiction, we assumed that at the psychophysical level, drug and Internet addiction may have similar manifestations, including at the level of pupillary reaction to a light flash. The conducted pupillometric study did not confirm the hypothesis. Pupillometric indicators of Internet addicts differ from those of drug addicts, which may be due to the characteristics of the addiction itself, which unfolds during a long interaction with the flickering screen of a digital device. In turn, the nervous system of both the Internet and drug addicts is more trained to respond to strong stimulation and has a more expressed resistance in comparison with the norm group. The results obtained will help to clarify the scientific understanding of the features of psychophysical predictors of the considered category of persons.
Keywords: drug addiction, Internet addiction, pupillography, pupillometer, pupil response