| Attention boost effect(ABE)refers to the phenomenon that the memory performance of background information presented with the target stimulus of the detection task is better than that of the background information presented with the distractor stimulus under the dual task condition of simultaneously performing the target detection task and the memory task.Previous studies have suggested that the generation of ABE is mainly due to the enhancement of attention induced by target decision-making.Since previous studies have observed ABE under Go target detection,Go target detection includes both target decision-making and action response.Therefore,it is not yet clear whether the generation of ABE is due to the promotion of attention triggered by goal decision-making,the enhancement of memory induced by action response,or the combined effect of the above two? Discussion on this issue will help to further clarify the mechanism of ABE.To this end,this study set up No Go target detection conditions and Go target detection conditions.Through four studies and ten experiments(including 11 behaviors and one ERP sub-experiment),the role of goal decision-making and action response in ABE generation was discussed to further clarify the mechanism of ABE generation.1.Study 1 found that ABE was found in Go target detection condition,and both within-conditional ABE(relative to Go distractor)and across-conditional ABE(relative to No Go distractor)were found in No Go target detection condition,but within-conditional ABE was significantly larger than across-conditional ABE in No Go target detection condition due to the memory inhibition effect of high frequency action on Go distractor.It shows that the facilitation effect of goal decision exists stably,and the generation of ABE is not only caused by the facilitation effect of goal decision,but also the existence of action response will affect ABE.2.Study 2 found that ABE under Go target detection condition and cross-condition ABE under No Go target detection condition(relative to No Go response)were stable under different proportion,but ABE under No Go target detection condition(relative to Go response)would be affected by proportion : when there was action enhancement effect on Go distractor(action response frequency 1/2,Experiment 2),ABE under No Go target detection condition would disappear;when there is no action enhancement effect on Go distractors(action response frequency 2/3,experiment 3),ABE is generated in No Go target detection conditions.Similar phenomena were also repeated in the same proportion of image materials(experiment 4a and experiment 4b).It shows that the action response frequency will affect the generation of ABE under the condition of No Go distractor target detection by affecting the action enhancement effect.3.Study 3 found that there was no significant difference between the condition of No Go target detection with high response inhibition and the condition of No Go target detection with low response inhibition in the condition of ABE(Experiment 5)and cross-conditional ABE(Experiments 6a and 6b),indicating that the target boost effect was stable and response inhibition did not affect the boost effect of No Go target detection.4.Comprehensive above studies found that the action response frequency will affect the generation of ABE,which is related to the effect of action response frequency on the action enhancement effect,and the two will show a linear relationship,and about 2/3 of the action response frequency seems to be a balance between action boost and inhibition.It shows that the generation of ABE is not only due to the boost of goal decision-making,but also the result of the dynamic balance between the boost of goal decision-making and the memory enhancement effect induced by the result of dynamic synergy with the change of the action frequency.Based on this,a ’ dynamic synergy model ’ is proposed.5.Study 4 found that ABE under Go target detection condition was affected by action response frequency as well as under No Go target detection condition,and response inhibition was not found in both conditions.Conform to the hypothesis of dynamic trade-off model.The mode of action of goal decision-making and action response in ABE advocated by this model was also verified by ERP data.It was found that whether the goal was accompanied by action response or not,it could induce P300 larger than the distraction condition.Moreover,Go condition at 1/2 action response frequency can induce larger P300 than No Go condition,but there is no difference between Go condition and No Go condition at 2/3 action response frequency.Based on the above results,this study shows that the attention boost effect of goal decision-making is relatively stable,but the generation of ABE is more the result of the dynamic balance between the boost effect of goal decision-making and the memory enhancement effect induced by action.The trade-off is mainly based on the regulation of the action response frequency on the action-induced memory enhancement effect,and the action response frequency is about 2/3 as an optimal balance point.Specifically,under the condition of Go target detection,when the action response frequency of target detection is too large(more than 2/3),frequent action response will have a certain inhibitory effect on the target word,which will weaken or offset the boost effect of target detection on the target word,resulting in the reduction or disappearance of ABE.Under the condition of No Go target detection,the action response will act on the distractors presented at the same time,and frequent action responses(more than 2/3)will have a certain inhibitory effect,thus increasing the difference between the target and the distractors resulting in more pronounced ABE. |
