The Cognitive Neural Mechanism Of The Effect Of Internet Interaction Behavior On College Students' "Hot" Executive Function

Internet interaction refers to highly interactive platforms where people employ mobile and web-based technologies to share,co-create,discuss,and modify user-generated content.By the end of December,2017,the proportion of Chinese instant communication users has reached approximately 93.3%,with the WeChat Moments and QQ Space are the most frequently used social applications.For most young people,Internet interaction has become a lifestyle and a habit.As a common means of communication,the overuse of Internet interaction may affect people's cognitive function.Executive function is the highest level of cognitive activity in the brain.Individuals often have to judge the emotional significance of stimulation in the process of Internet interaction,and it require a high emotional involvement.Thus,this study aimed at exploring the relationship between Internet interaction and "hot" executive function among college students.According to this purpose,the following studies was conducted:Firstly,using two types of experimental paradigm—the delay discount task and the Iowa gambling task,to investigate the performance of high and low online social individuals in the two tasks,so as to explore the cognitive mechanism between Internet interaction and "hot"executive function.The results of study 1a and study 1b showed that,the impulse rate of high and low groups increases in the condition of delay 2 days,delay 30 days,delay 180 days,and delay 365 days,and they were more likely to choose the cards with high instant income and low penalty frequency.The high groups' net score was higher than that of the low groups,which supported the Somatic Marker hypothesis,namely high online social individuals depended more on the body's emotional markers than on rational reasoning to make decisions.Secondly,investigating two groups' performance in the delay discount task and the Iowa gambling task from two time points—in October for the first time and in December for the second time.After that,using the cross lag analysis method to examine the causal relationship between Internet interaction and "hot" executive function.The results of study 1a and study 1b preliminary indicated that Internet interaction intensity is the predictive variable of "hot" executive function.Thirdly,using electroencephalography(EEG)technology to investigate the differences of electrophysiological indexes between high and low online social individuals in delayed discount task and Iowa gambling task,in order to explore the neural mechanism of Internet interaction and "hot" executive function.The results of study 2a and study 2b showed that,in the delay discounting task,for high group subjects,who exhibited a larger N2 amplitude and a shorter RewP/P300 latency,the longer the delay time,the higher the impulse rate;in the Iowa gambling task,high group subjects who performed a smaller and shorter P300/FRN in the aspect of average amplitude and latency,exhibited their decision model of "immediate return priority" and the high tolerance to risk.This indicated that higher Internet interaction impaired individuals' "hot" executive function in a certain extent.