1Institute for Occupational Health of National Academy of Medical Sciences of Ukraine, Kyiv
2Ukrainian Military Medical Academy, Kyiv
Introduction. An information overload can affect the reliability and work capacity of military operators, stimulate increasing their emotional negatively outlined strain. An objective availability of the psychoemotional overload in a modern person requires developing a new, more improved access to assessment of work reliability and new psychophysiological approaches to validation of modern technologies for psychophysiological assessment of reliability of an operator’s performance in conditions of time deficiency.
Purpose of the study is to reveal regularities and analyze psychophysiological patterns in changes of reliability of military operators’ performance in processing the contradictory information in conditions of time deficiency.
Materials and methods. Studies on reliability of the operator’s performance in simulation of information flows with contradictory information were conducted in 2012–2013. A sample of the studied individuals covered 54 military man-operators, aged 22–25, being in the state of acute emotional strain, caused by a procedure on entering a higher military institution. A scale of subjective assessments of mental states (CMSA – current mental state assessment) has been used for studying the emotional status. A specially designed computer program has been developed for simulating the operator’s performance in the information processing in conditions of time deficiency and which, with the given probability, is accompanied by constellations of certain events, contradicting with the given algorithm of the operator’s performance.
Results. An information overload in simulation of contradictory constellations significantly affects the emotional background of the studied persons by the majority of indicators. Two groups of operators have been distinguished with different levels of emotional strain and significantly different indices of reliability in operator’s performance. The probability of an erroneous reaction after a fictitious signal on an erroneous action in persons with high emotional strain was higher, by 11,8 times, on the average, р < 0,001. Regulations for task performance for classification of operators on groups with high and low levels of reliability in processing the contradictory information have been developed.
Conclusion. It is established that according to the state of high emotional strain military operators are differed both by the background indices of the emotional strain and by its characteristics after an information overload, accompanied by the maintenance of the imbalance in subjective assessments of mental states and after information strain. A hypothesis was formulated on the presence of nonlinear effects, similar to Broca-Sulzer phenomenon, in processing information messages, which affect significantly the reliability of the operator’s performance. A method of psychophysiological assessment of reliability of the operator’s performance in military servicemen has been developed, based on simulation of presentation of contradictory constellations (a clash effect by І. P. Pavlov), which can additionally formulate certain negative emotional states in processing intensive information flows. A significant difference has been revealed in reactions on a fictitious error in individuals with different emotional strain, which is characterized by a significantly high part (by 11, 8 times higher, р < 0,001) of the probability of occurrence a fictitious reaction after a fictitious signal on a erroneous action in individuals with high emotional strain. A model has been developed for supporting a physician’s decision in assessing the reliability of the operator’s performance by psychophysiological indices and criteria of referring a studied operator to groups with higher or low level of reliability in processing the contradictory information.
Key words: reliability of performance, emotional state, simulated contradictory information, Broca-Sulzer phenomenon