Dr. LI Wang On, AlexAlexDr. LI Wang OnYuen, Sung Lai KennethSung Lai KennethYuenChang, Dorita Hue-fungDorita Hue-fungChangProf. YU Kai Ching, CalvinCalvinProf. YU Kai Ching2026-06-222026-06-222025Li, W. O., Yuen, K. S. L., Chang, D. H. F., Yu, C. K. C. (17-20 Jun 2025). A study using the time adaptation paradigm: Does rTMS influence time perception or time reference?. APCV/EPC 2025, Sydney, Australia.http://hdl.handle.net/20.500.11861/27606Repeated exposure to stimuli of similar duration can influence subsequent time perception. Our hypothesis was that if repetitive transcranial magnetic stimulation (rTMS) affects mental time references, a main effect would be observed regardless of the adaptation manipulation. A total of 120 participants took part in the study and were divided into four groups based on a 2x2 between-subject design, with two stimulation locations (rDLPFC vs cerebellum) and two adapted durations (500 vs 2000 ms). The 2x2 within-subject conditions included sham vs rTMS stimulation and control vs adapted, with a reference time of 500 ms for the time bisection tasks. The analysis included 107 valid participants. In the sham stimulation condition, a main effect was observed, showing a reduction in perceived subjective equivalent (PSEs) after adaptation (F1,103=9.24, p<.01, η2=0.02). However, the main adaptation effect was not significant in the rTMS conditions (F1,102=0.01, p=.92, η2<0.01). Instead, a significant interaction was found between adapted duration, adaptation, and stimulation locations (F1,102=4.42, p=.04, η2=0.01). Specifically, rTMS on the cerebellum disrupted the aftereffect of 500 ms adapted duration. These results are consistent with previous studies highlighting the role of the cerebellum in sub-second perception. Furthermore, they demonstrate that rTMS perturbation can influence the perception process rather than the mental time reference.enConference Paper