Cognitive control - EEG-based decoding

The primary objective of this study was to use machine learning techniques to decode EEG signals of human scalp during Simon task, aiming to unravel the nature of the top-down cognitive control process. Results showed that decoding accuracy for distractor brain representation decreased after cognitive control was activated. Moreover, the modulation mainly occurred in the high beta-frequency band (20-30 Hz). These findings suggest that cognitive control regulates Simon conflict by inhibiting distractor representation in the brain, thereby reducing unwanted distraction-driven behaviors.

Lee, Y. S., Bae, G. Y., & Cho, Y. S. (Under Review). Inhibition Resolves Simon Conflict: Evidence from EEG Decoding. Journal of Cognitive Neuroscience

Cognitive control - behavior

This research aimed to understand the top-down cognitive control mechanisms underlying the congruence sequence effect (CSE). By manipulating task characteristics and testing the transfer of CSE across tasks, the study sought to infer the scope of cognitive control. Using a bottom-up confound-minimized design, the research found that conflict resolution in the Simon task occurs at the automatic link between the task-irrelevant dimension and response mode, a key dimension where inhibition is exerted.

Lee, Y. S., & Cho, Y. S. (2023). The Congruency Sequence Effect of the Simon Task in a Cross-Modality Context. Journal of Experimental Psychology: Human Perception and Performance

Lee, Y. S., Yang. E., Park. H., Chu. W., & Cho, Y. S. (Submitted). The Conflict Resolution Process in Stimulus-based Conflict Tasks. Psychonomic Bulletin & Review

Interoception - Heart-beat evoked potential

This research focuses on interoception and its influence on decision-making, using Heartbeat Evoked Potential (HEP). The study hypothesizes that individuals with higher interoceptive awareness are more likely to align with the group’s average choice. Data collection is currently underway.

Kim, Y. R., Kim, J. Y., Lee, Y. S., Cho, Y. S., & Kim H. (in Prep). Interoception: Evidence from Heartbeat Evoked Potentials

Impact of Youtube shorts on Sustain attention

This study examined the effects of short-form video consumption on sustained attention. Participants completed the Sustained Attention to Response Task (SART) after being exposed to either short-form or long-form videos. Results indicated that short-form video exposure was negatively associated with sustained attention. The study provides empirical evidence that short-form videos may impair attentional capacity.

Kim, G., Jung, Y., Lee Y. S., Choi, E., Cho Y. S. & Sung, Y. (Submitted). The Impact of Short-Form Content on Sustained Attention Deficits. Psychological Science

Social Inequity

This project aimed to create a program to enhance disability awareness and empirically validate its effectiveness. The Implicit Association Test (IAT) was used to measure changes in disability awareness. Findings showed that awareness improved only when participants encountered social barriers similar to those faced by wheelchair users. In contrast, no significant improvement was observed when participants simply assisted others. These results suggest that implicit awareness improves when individuals perceive themselves as part of a shared experience, rather than viewing individuals with disabilities as a separate group requiring help.

Certificate of Award in BK21 Four Project Competition (2021)