Poster D25, Monday, March 26, 8:00-10:00 am, Exhibit Hall C
Characterizing the Impact of Aging on Automatic Inhibition
Tzu-Ling Li1, Erik Chang1; 1National Central University
Inhibitory functions are crucial for keeping our behaviors under control, and it is prone to the influence of aging. In the current study, we carried out two experiments to explore the impact of aging on automatic inhibition. In Experiment 1, we adopted a location negative priming (LNP) task where the participant responded to a target (circle) in the prime and probe events, respectively, of a trial. The interval between the response to the prime and the probe onset (IRP) was randomly selected among 389, 931, 1463, and 1995ms to explore the time course of the NP effect in both an elderly and a young group. For the young group, the NP effect remained relatively stable across time as compared to the elderly and peaked at the 389-ms IRP. For the elderly group, the time course of the NP effect appears to be a reversed-U shape that peaked at 931ms, the NP effect is significant than others. In Experiment 2, we combined Go/No-go task with the LNP task where the participant does not respond to prime if a yellow target is presented. While the NP effect of Go primes is much larger than No-go primes in the younger group, no significant effect was found in the elderly group. To summarize, we found that aging impacts how automatic inhibition evolves over time. In addition, aging modulates both controlled and automatic inhibition but in different fashions.
Topic Area: EXECUTIVE PROCESSES: Development & aging