Related Experiment Videos
"Aha!" effects in a guessing riddle task: an event-related potential study.
Xiao-Qin Mai1, Jing Luo, Jian-Hui Wu
1Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, People's Republic of China.
Human Brain Mapping
|June 18, 2004
Summary
Insightful problem solving involves breaking mental sets. This study found that the anterior cingulate cortex (ACC) generates an "Aha!" effect during insight, identified via event-related potentials (ERPs).
Area of Science:
- Cognitive Neuroscience
- Neuroscience
- Psychology
Background:
- Insight problem solving is widely believed to involve breaking mental sets.
- Previous fMRI studies linked insight to anterior cingulate cortex (ACC) activity.
- The ACC's role in cognitive conflict suggests it may mediate breaking mental sets.
Purpose of the Study:
- To investigate the electrophysiological correlates of insight problem solving using high-density event-related potentials (ERPs).
- To examine the neural mechanisms underlying the "Aha!" moment in problem-solving.
Main Methods:
- Recorded high-density ERPs from 14 subjects solving Chinese riddles.
- Classified trials as "Aha answer" (breaking mental set) or "No-aha answer" (consistent with initial thinking).
- Analyzed ERP differences between "Aha" and "No-aha" conditions, including dipole analysis for source localization.
Main Results:
- "Aha" answers elicited a more negative ERP deflection (N380) between 250-500 ms compared to "No-aha" answers.
- The N380 showed maximum amplitude over the central site (Cz) with a peak latency of 380 ms.
- Source localization of the N380 identified the ACC as the generator, suggesting its involvement in breaking mental sets.
Conclusions:
- The N380 likely reflects the "Aha!" effect associated with insight.
- The ACC generator of N380 is implicated in the cognitive process of breaking mental sets during problem-solving.
- ERPs provide valuable insights into the temporal dynamics of insight.