Salient cues enhance strategy monitoring and task switching for prospective memory:An ERP study
10.3760/cma.j.issn.1674-6554.2009.06.016
- VernacularTitle:线索突出性强化前瞻记忆监控及任务切换的事件相关电位研究
- Author:
Wei ZHANG
;
Shu ZHOU
- Publication Type:Journal Article
- Keywords:
Prospective memory;
Prospective interference effect;
Event related potentials
- From:
Chinese Journal of Behavioral Medicine and Brain Science
2009;18(6):526-528
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the retrieval mechanism of prospective memory,spatiotemporal patterns of event-related potentials (ERP) were used to reveal neural correlates of the prospective interference effect. Methods A task of matching two sequential patterns was taken as the ongoing task and the detection of patterns with two salient levels as prospective memory tasks. Experiments were performed in blocks for single ongoing task block and two prospective memory blocks. Results No significant behavioral effect was found for prospective interference [reaction time(ms):control blocks 750.29±161.33,high salience blocks 770.94±174.89,low salience bocks 764.79±174.12,F(1.52,25.82)=0.48,P =0.57 and correction rate(%):control blocks 85.89±8.07,high salience blocks 88.26±7.00,low salience blocks 87.91±7.28,F(1.50,25.57)=2.46,P =0.12].But significant ERP effect was found at bilateral frontal regions from 160 ms to 240 ms for both two prospective memory blocks. Moreover,greater negativity at the right frontal polar region appeared significantly at 360'440 ms for higher salient patterns. Conclusion Prospective memory is retrieved based on strategic monitoring and high salient stimuli may enhance to keep the prospective goal and improve task switching.
