ISSN 0439-755X
CN 11-1911/B

Acta Psychologica Sinica ›› 2023, Vol. 55 ›› Issue (7): 1049-1062.doi: 10.3724/SP.J.1041.2023.01049

• Reports of Empirical Studies •     Next Articles

The effect of reward prediction error on temporal order and source memory

ZHANG Hongchi, CHENG Xuan, MAO Weibin()   

  1. School of Psychology, Shandong Normal University, Jinan 250358, China
  • Received:2022-09-15 Published:2023-07-25 Online:2023-04-21
  • Contact: MAO Weibin
  • Supported by:
    The Natural Science Foundation of Shandong Province(ZR2021MC081);The “Cognitive and Brain Mechanism of Working Memory” research and innovation team of Shandong Normal University


Although previous research has demonstrated that event boundaries enhanced source memory at boundaries and reduced temporal order memory across boundaries, there is little research on whether there is a mnemonic trade-off between temporal order and source memory and how intrinsic, socially meaningful change as event boundaries affects memory. The present study explored the effects of RPE event boundaries on temporal order and source memory by reward prediction errors (RPE) as event boundaries in two behavioural experiments and one ERP experiment. The results showed that RPE event boundaries enhanced source memory at the boundaries, and high RPE event boundaries produced mnemonic trade-off effect; compared to within-event/non-boundary conditions, a larger N400 amplitude was induced by across-event/ boundary conditions, and activation of temporal order memory was focused on anterior region, activation of source memory was focused on posterior region. The present study showed that the strength of segmentation of event boundaries is an important factor in mnemonic trade-off effects, and that the N400 component may be an important indicator of the integration and segmentation of episodic memory by event boundaries.

Key words: reward prediction error, event boundaries, temporal order memory, source memory, mnemonic trade-off effect