The Research On The Effect Of TDCS Intervention Technique On Attentional Bias Of Mobile Phone Addicts

Objective: With the diversification of mobile phone software,people are becoming increasingly dependent on their phones.The most obvious problem with this dependence is that it causes people to develop an attentional bias.In this paper,based on previous research,the aim of this study is to investigate the mechanism of t DCS to improve the attentional bias of mobile phone addicts by using t DCS(transcranial direct current stimulation)technique to suppress the relevant brain areas.Methods: The subjects in this study were all university students(age 24±2 years)from Tianjin Sports College.Some subjects were unable to return to school on time due to unavoidable factors,so a total of 39 subjects were included in this experiment,including 18 in the non-cell phone addiction group and 21 in the mobile phone addiction group.Of these,21 were male and 18 were female.The data were collected and analysed before and after the t DCS intervention by using an adapted point-detection experimental paradigm and the Experiment Builder to write a counter-eye jumping program to investigate issues related to the attentional bias of t DCS on addicts.t DCS stimulation subjects in this study were asked to ensure that their scalp was clean and dry before starting the experiment.Then choose waveform DC,the stimulation site is selected to stimulate the dorsolateral prefrontal lobe(DLPFC),the specific stimulation site is selected as F4 as the central cathode,F2,AF4,F6,FC4 as the return electrode,the stimulation intensity is 2 m A,the stimulation time is 20 min,the selected mode is Active Stim.Silence was ensured during stimulation,avoiding external disturbances and other stimuli.Results: 1)The MPAI questionnaire indicated that there was a significant difference between withdrawal and hypoacusis in the mobile phone addiction group compared to the non-cell phone addiction group;2)Heart rate and blood pressure indicators indicated that there was no significant difference in heart rate and blood pressure in the mobile phone addiction group compared to the non-cell phone addiction group,and compared to the pre-t DCS intervention,heart rate and blood pressure in the mobile phone addiction group after the t DCS intervention were also(3)The results of the dot-probe experimental paradigm showed that the mobile phone addiction group had a longer reaction time and a lower correct rate when completing the prescribed task compared to the non-mobile phone addiction group,and the mobile phone addiction group had a significantly lower reaction time and a significantly higher correct rate when completing the dot-probe prescribed task after the t DCS intervention compared to the pre-t DCS intervention;4)The anti-eye hopping experimental paradigm showed that,compared with the non-cell phone addiction group,there were significant differences in the overall number of gaze,overall gaze time,gaze correction time,sweep correction time,forward-facing sweep time,and number of sweeps in the mobile phone addiction group,and compared with the pre-t DCS intervention,the overall number of gaze,overall gaze time,gaze correction time,sweep correction time,and number of sweeps in the mobile phone addiction group after the t DCS intervention time,sweep correction time,sweep time towards the front,and number of sweeps)were significantly improved after the t DCS intervention compared to before the t DCS intervention.CONCLUSION: This study found that mobile phone addicts’ attentional bias to addictive information was effectively improved by t DCS stimulation of the left DLPFC.