EEG alpha activity is moderated by the serial order effect during divergent thinking.

Area of Science:

• Cognitive Neuroscience
• Neuropsychology
• Psychology

Background:

• The serial order effect, characterized by increasing creativity and decreasing fluency over time, is well-documented in tasks like the Alternative Uses Task.
• However, the underlying neural mechanisms of this effect remain largely uninvestigated.

Purpose of the Study:

• This study aimed to explore the electrophysiological correlates of the serial order effect.
• Investigating the role of brain activity during creative thinking and verbal fluency tasks.

Main Methods:

• Electroencephalography (EEG) alpha activity was recorded using a task-related power paradigm.
• Participants completed the Alternative Uses Task and a Category Fluency Task.

Main Results:

• A significant difference in left versus right hemisphere alpha power was observed, correlating with the serial order effect.
• This hemispheric asymmetry in alpha activity was specific to the Alternative Uses Task and not present in the Category Fluency Task.

Conclusions:

• The findings suggest that changes in EEG alpha activity patterns are associated with the serial order effect.
• This provides novel insights into the neural basis of creative ideation and cognitive processes over time.