COMPARATIVE ANALYSIS OF ANXIETY AND COGNITIVE INDICATORS IN ADOLESCENTS BEFORE AND AFTER THE COVID‑19 PANDEMIC

The 21 st century will be remembered with the problems made by the Covid-19 pandemic and its role as a major stressor causing serious damage to health indicators. There have been various pandemics on Earth up to our time. However, the pandemic caused by coronavirus is considered the most severe: a number of adverse phenomena such as infection of people regardless of their social status, place of residence, financial situation, background, intellectual level, and most importantly age, the number of cases ending in death, the occurrence of serious health problems in those who have had disease, reduction of human life, shortening, inability of the immune system to recover over a long period of time, increased cognitive dysfunctions, significant psychological distress and behavioral changes caused. The study reflects the impact of pandemic stress on psychophysiological indicators in adolescents aged 12 and 13. It should be noted that before the pandemic, in February 2020

Given that the Covid-19 pandemic played a role in creating a tragedy for humans, it is appropriate to call it a stressor.What problems has stressor caused?First, it caused changes in the way of life to which people have been accustomed for centuries, the introduction of mandatory bans on staying at home, the management of works from home, the transition of education to online system, the inability to implement national traditions, the refusal to hold mass events, the increase in social isolation and hypokinesia, the wider use of electromagnetic radiation sources, etc. caused (Anguera, et al., 2016;Karamova, 2021;Tull, et al., 2020;Wanga, et al., 2021).According to the World Health Organization, the coronavirus has severely affected human health and increased chronic diseases, psychological disorders, and behavioral changes, in addition to deaths.Although the observed changes are increasing mainly in people over the age of 60, there is evidence of serious health problems in children and adolescents as well.The cause of the problem is the delayed adaptation to the new environment or inability to adapt; consequently, stressful situation occurs, psychophysiological indicators deviate from the standards, health indicators deteriorate, and other pathologies are caused (De Matos, et al., 2020;Verduzco-Gutierrez, et al., 2021;Wolf, et al., 2022).
The COVID-19 pandemic is a pandemic caused by the SARS-CoV-2 coronavirus (Renyi, et al, 2020).Although the disease was first reported in Wuhan, China, in December 2019, it soon spread worldwide.The epidemic was declared a public health situation of international concern and a pandemic by the World Health Organization on January 30, 2020 (Vu, et al., 2020;Saunes, et al., 2020;World Health Organization, 9 May 2020).In Azerbaijan, since March 2020, important measures have been taken by state authorities in connection with the pandemic, the "Stay Home", online education, etc. has been applied.
It's known from the literature that the coronavirus pandemic continues to enslave the population, especially those aged 0-18 years and over 60 years.Thus, people in these age groups are most vulnerable to the disease.According to the WHO General Rules, during a pandemic, people with acute respiratory infection (ARI) should stay at home, minimize contact with family members and strangers and self-isolate if having any symptoms.There is already information that the spread of coronavirus (COVID-19) has caused fear, anxiety, stress and depression in people all over the world (Karamova, 2021;Shishkova, et al., 2023;Wolf, et al., 2022).The caused stress depends on the level of reaction to the incident, past life experiences, character, temperament and the society lived in.During the spread of an infectious disease, stress can be caused by several factors in particular: • People fear and worry about their health and the health of their beloved; during the day and hypokinesia, etc. (Anguera, et al., 2016;De Matos, et al., 2020;Hamadani, et al., 2020;Sacco, et al., 2022).Disruption of daily habits to which a person is accustomed causes a number of changes, the largest of which is disruption of their biological clock.In such case, the psychological problems such as insomnia, fatigue, stress occur.Furthermore, staying at home for long periods of time, not being able to see friends, the sudden loss of freedom can lead to emotional distress and depression in a person as stressors.Thinking about the possibility of persistent infection with the coronavirus causes fear and anxiety.According to studies, it is known that fear and anxiety states that were at a maximum level, during quarantine, will decrease to a minimum level after 4-6 months of quarantine.However, some psychological problems, such as depression, post-traumatic stress disorder, sleep disorders, can be observed both during the quarantine and after the quarantine (Loades, et al., 2020;Shishkova, Sergeevna, et al, 2023).Even after the pandemic, the signs of psychological change cases such as the a long period of fear in population, adaptation to society, not to leave home without no masks, and other protective equipment, avoid communication with people, etc. (Shishkova, Shishkov, et al, 2023).Given the above, the study is of great importance.

Aim of the study
The main aim of the study was to identify the impact of the Covid-19 pandemic on psychological arousal, short-term memory, visual memory and attention indicators of adolescents.

Object and stages of the study
Psychophysiological studies of adolescents aged 12-13 and 14-15 living in Khachmaz and Sheki cities of Azerbaijan Republic were conducted (Fig. 1).
The study was conducted in 2 phases.Phase I: Before the pandemic, in February 2020; Phase II: After the pandemic, in October 2022.The 12-13 year olds who participated in the Phase I study also re-participated in the post-pandemic phase of the study, conducted in 2022.Psychophysiological testing methods were conducted on one of the regular school days, and the subjects were involved in the testing voluntarily.

Obtained results and their discussion
As already have been mentioned, the study was conducted in two stages and we have 3 groups of results.Initially, the results of the study of psychophysiological indicators of adolescents 12 and 13 years in 2020 are shown in Figure 2. It was found that in adolescents 12 years old living in Khachmaz, situational anxiety is 39.34 ± 1.24 points, individual anxiety is 46.65 ± 1.23 points, and in adolescents 13 years old situational anxiety is 40.14 ± 1.87 points, individual anxiety is 45.21 ± 1.39 points.The study of short-term memory, visual memory and attention indexes among the cognitive indicators of adolescents living in Khachmaz showed that they are within the normal range.Thus, in adolescents 12 years, visual memory is 9.45±2.21points, short-term memory index is 7.45±0.98points, attention index is 10.05±1.67 points; in adolescents of 13 years, visual memory is 10.04±2.31 points, short-term memory is 6.48±1.83points, attention index is 8.55±1.59points.

Figure 4. Comparison of pre-pandemic and post-pandemic visual memory scores of adolescents who live in the cities of Khachmaz and Sheki
In adolescents 12 years of age, visual memory is 9.34±1.29 points, short-term memory index 5.21±1.35points, and attention index 8.97±1.89points; In adolescents 13 years of age, visual memory is 9.89±1.27points, short-term memory is 5.83±1.39 points, and attention index is 7.71±1.38points.

Figure 6. Comparison of pre-pandemic and post-pandemic study of attention span of adolescents who live in the cities of Khachmaz and Sheki
During the analysis of the results of the study, it was found that the pandemic created stress and caused the development of stress symptoms.Especially the trace of stress is more noticeable in adolescents living in Sheki city.This can be explained with the fact that in conditions of social isolation, adolescents mostly sit still, watch TV, sleep or eat, do not lead an active lifestyle, etc.Most of the population of the city of Khachmaz live in houses with yards, and in this regard, it is known that in conditions of social isolation they move more, do physical labor, even if they do not leave their yards, and engaged in preventing the development of hypokinesia, as evidenced by the relative change in the studied indicators.
In spite of the fact that much time has passed since the pandemic, it was noticed that stress reactions persist in adolescents.Such facts as a high level of anxiety indicators and a relative weakening of cognitive indicators can be explained by the fact that full adaptation to the new conditions after the pandemic has not occurred, and the persistence of tension of psychophysiological indicators has weakened the adaptation process (Avittan, Kustovs, 2023;De Figueiredo, et al, 2021;Rodman, et al., 2022;Rossi, et al., 2021;Roy, et al., 2022).

Conclusion
The pandemic conditions, which played a stress factor role, led to an increase in indicators of psychological anxiety in adolescents and a relative weakening of memory and attention processes.Rapid development of adolescents, incomplete processes of neurohormonal regulation and adaptation created conditions for preservation of stress reactions after the pandemic (Azizi, et al., 2020;Rosanna, et al., 2023;Vanderlind, et al., 2021;Wong, et al., 2020;Shishkova, Imamgayazova, & Kapustina, 2023).Due to the fact that the cognitive processes of 14-year-olds are more complex than those of younger adolescents, their level of individual arousal was higher.It was found out that the fact of settlement in different geographical areas has influenced the level of stress development.Pandemic stress has been more pronounced in adolescents living in the city than in adolescents living in other regions.Pandemic stress has caused symptoms similar to the action of other stressors and negatively influenced psychophysiological indicators.

Figure 1 .
Figure 1.Geographical location of the cities of Khachmaz and Sheki of the Republic of Azerbaijan

Figure 2 .
Figure 2. Comparison of pre-pandemic and post-pandemic situational anxiety in adolescents living in Khachmaz and Sheki

Figure 5 .
Figure 5.Comparison of short-term memory scores before and after the pandemic in adolescents who live in the cities of Khachmaz and Sheki