Obese Negative Body Self Middle School Students' Attentional Bias Towards Different Types Of Food

With the progress of human civilization and the development of the society,the abundance of material environment leads people have more opportunity to expose the tempting food,making the epidemic of obesity has become a social problem.Junior middle school students focus on all the more to their own body image,and if the body fat,is easy to generate negative cognition,emotion and behavior,namely the fat negative physical self.So what was the attentional bias towards different types of food cues? What role can health goal-priming play in modifying attentional bias?In experiment 1,we used spatial cueing task and used the reaction time to the probe stimulus as the dependent variable,to investigate when the cue presentation duration is 500 ms,the features of attentional bias when participants in face of high calorie food pictures,low calorie food and neutral food pictures.Experiment 2 combined with eye movement technology and simulated online supermarket shopping to investigate whether unconscious health goal-priming can affect the visual attention and food choice of middle school students with fat negative body self.The ANOVA in experiment 1 showed that on no valid trials,the main effect of participant' type was significant.By comparing the mean value,it was found that the reaction time of participants with high fat negative body self to the picture stimulus was significantly longer than that of participants with low fat negative body self.Although the interaction between participants types with cues type was not significant,neither high fat negative physical self participants or low fat negative physical self participants to the reaction time of the high calorie food pictures are longer than the low calorie food pictures and neutral food pictures,which showing high calorie food attract more attention of the participants.The ANOVA in experiment 2 showed that compared with no goal-priming trials health goal-priming trials can increase the total fixation dwell time for low calorie food,and the total fixation dwell time for low calorie food of high fat negative physical self participants was significantly longer than low fat negative physical self participants,but for the proportion of low calorie food choices was not significantly.