In the process of studying, students have to learn to identify independently the main points of the material
studied, make up and apply the algorithms of searching problems solutions, find the rational answers to
problem solutions, critically analyze the results obtained and be able to use them further on. All the above mentioned facts lie in the basis of forming and developing the logical thinking. The
objective criteria of assessing the current functional state and the readiness of students are the
physiological indices reflecting the state of the mechanisms of vegetative regulating the cardio-vascular
activity. In this respect, the analysis of heart rhythm variability (HRV) is becoming increasingly common.
It is a simple, non-invasive and informative method of researching the vegetative nervous system.
The balanced regulation of the physiological functions allows students, having a proper motivational
level, to use the opportunities for maintaining cognitive functions to the full, which significantly
influences the process of studying. This article deals with studying the mechanisms of maintaining
psychological processes and possibilities of applying the method of Kirlian photography for assessing the
psycho-emotional state in the process of logical thinking.
175 female volunteers aged 18-22, students of the faculty of Biology, Ecology and Medicine of Oles
Honchar Dnipropetrovsk National University took part in the experiment. At the moment of conducting
the research they all were practically healthy, did not have any complaints of headaches or any other ache,
physical fatigue or sleepiness. Testing was conducted in the morning hours which made it possible to
exclude the influence of the vegetative heart rhythm fluctuations during different parts of the day on the
results of the research. The experiments were carried out at two stages. During the first stage, the
individual psycho-physiological characteristics of the students were studied, during the second stage, the
saturation level was assessed and the heart rhythm variability was analyzed.
According to the results of the psychological testing, the right-handed, ambivert students who did not
have asthenia, had a medium level of stress resistance, a medium anxiety level and a strong type of the
nervous system were selected. According to the thinking type, the groups with low and high level of
logical thinking were formed. At the second stage, the oxygen saturation degree of the arterial blood
hemoglobin and the pulse rate in the process of intellectual activity were researched. The neurovegetative
state was assessed by the heart rhythm variability.
While doing the tasks connected with logic, the students with a low level of logical thinking demonstrated
the increase in the oxygen saturation degree of the arterial blood hemoglobin and the decrease in the heart
systole rate (HSR). The change of the indices of the heart rhythm variability – the decrease in mode
amplitude along with the simultaneous increase in the vegetative indices and significant increase in stress
index – indicates the activation of the central mechanisms of mental processes regulation. The students
with a low level of logical thinking were in tense state before doing the tasks, and doing the tests
connected with the logical thinking experiences some difficulties in finding logical connections and gave
the majority of answers randomly, without making any efforts.
The students with the medium level of logical thinking, while doing the tasks connected with the logical
thinking, demonstrated the reliable increase in the saturation level and heart systole rate. The tested
reported that they were making efforts doing the tasks. The correct answers given by the students of this
group made 50-70%. The mode and mode amplitude indices before and after the cognitive activity were
within the norm. The reliable decrease in the variation span testifies to the decrease in parasympathic
influence. The increase in the stress index and the decrease in heart rhythm variability testify to the
central mechanisms of regulating the logical thinking process, which is more expressed in people who are
more successful in doing tasks.
The final stage of this investigation included studying the possibilities of applying Kirlian method for
assessing the psycho-emotional state of a person in the process of logical thinking. The registered images
of the third (middle) right hand finger, the sectors of which by P. Mandel corresponded to reactive cardiovascular
and lymphatic systems, were to be computer analyzed.
The students with a low level of the logical thinking who did not cope with the task and showed low
results (up to 40% of right answers) demonstrated the decrease in the crown luminescence area of the
third right hand finger. The students with a medium level of logical thinking demonstrated the increase in
the crown luminescence area of the third right hand finger. We should remark, that the higher the level of
logical thinking, the more the luminescence area.
Studying the scientific analytical works on neuro-cognitology, unfortunately, did not give the information
about applying Kirlian graphology in the modern research in the cognitive brain function. On the basis of
our own data, we can conclude that the method applied allows studying neuropsychological processes of
higher nervous activity in a new way, by the complex combination of psychometric and apparatus
research, which makes it possible to visualize the changes in psychic, physical and bio-energyinformative
level of human organization under the conditions of the experimental, in particular cognitive,
activity. Taking into consideration the high sensitivity of Kirlian method, it can be recommended for
identifying the individuality of students which was not detected by the results of psychological tests