Event-related potentials developmental characteristics of picture recognition memory in children aged 6-12
Objective To explore the developmental characteristics of event-related potential(ERP)in cognitive function of recognition memory in children aged 6-12.Methods A total of 130 normal children were divided into seven age groups(6(n=20),7(n=17),8(n=23),9(n=24),10(n=19),11(n=15),and 12 years old(n=12))to perform a picture study-recognition task and record the reaction time,accuracy,and ERP components of all participants.SPSS 22.0 software was used for data analysis.Sin-gle factor analysis of variance and trend of variance were used to compare the response time and accuracy of 7 groups of children during the recognition stage.Pearson correlation analysis was used to study the correla-tion between the amplitude of the central midline N2 component and age.Paired t-test was used to examine the old/new effects of the amplitude of midfrontal N2 and midparietal P3 waves.Results(1)The differ-ences of recognition ability(F(6,123)=2.476,P＜0.05),old picture reaction time(F(6,123)=6.461,P＜0.001),and new picture reaction time(F(6,123)=4.163,P＜0.001)among 7 age groups of children were sta-tistically significant.Recognition ability of children aged 6(0.61±0.24)was lower than those of 8-12 years old children((0.76±0.27),(0.76±0.10),(0.73±0.11),(0.75±0.10),(0.70±0.17)respectively)(all P＜0.05).The reaction time of the old picture showed no difference among the children aged 6-9(all P＞0.05),and the reaction time of old picture of children aged 12 was shorter than those of 6-10 years old chil-dren(all P＜0.01).There was no significant difference in the reaction time of new pictures among the chil-dren aged 6-10(all P＞0.05),and which in children aged 12 was shorter than those in 6-10 years old chil-dren(all P＜0.01).(2)Age was positively correlated with the amplitude of the N2 component in the central region under the new(r=0.488,P＜0.001)and old picture(r=0.452,P＜0.001)conditions.(3)At6years old,children showed old/new effects on the mid-frontal electrodes.At 7 years old,there were no old/new effects in either the mid-frontal or mid-parietal regions.From 8 to 9 years old,old/new effects appeared in the mid-parietal lobe.At 10 years old,old/new effects were present in both the mid-frontal and mid-parietal regions.At 11 years old,the mid-parietal lobe showed old/new effects.Finally,at 12 years old,negative old/new effects could be observed in both the mid-frontal and mid-parietal regions.Conclusion There are three periods of changes in the behavior of picture recognition memory in school-age children.At ages 6-7,the ac-curacy rate is relatively low;at ages 8-9,it improves;and between ages 10-12,the accuracy rate stabilizes while also enabling faster judgments.Children's recognition memory retrieval process is more complex than their behavioral performance.Children have different tendencies toward strategies,but strategic transitions in recognition processing are not always beneficial for performance.
NETL
NSTL
万方数据
维普
