ISSN 1671-3710
CN 11-4766/R
主办:中国科学院心理研究所
出版:科学出版社

心理科学进展 ›› 2017, Vol. 25 ›› Issue (suppl.): 67-67.

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 Time perception is modulated by perceptual present as well as contextual past: A repetition suppression effect

 Li Shena;   Xiaorong Chenga, b;   Xianfeng Dinga, b;   Zhao Fana, b   

  1.  a School of Psychology, Central China Normal University, 152 Luoyu Road, Hongshan Dist., Wuhan, China, 430079
    b Key Laboratory of Adolescent Cyberpsychology and Behavior (CCNU), Ministry of Education, 152 Luoyu Road, Hongshan Dist., Wuhan, China, 430079
  • 出版日期:2017-08-26 发布日期:2017-08-13
  • 基金资助:
     

 

    

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  • Online:2017-08-26 Published:2017-08-13
  • Supported by:
     

摘要:  PURPOSE: The current study aimed to investigate the underlying mechanism of how perceived duration of a visual target is modulated by perceptual as well as contextual magnitude induced by Arabic numbers.
METHODS: The current study combined context manipulation with duration judgement. In the learning phase, participants were trained to categorize 340, 400, and 460ms intervals as short, medium, and long durations, respectively. The subsequent testing phase included small magnitude context (10, 20, 30, 10, 20, 30), large magnitude context (70, 80, 90, 70, 80, 90) and mixed magnitude context (10, 20, 30, 70, 80, 90). The participants first rated whether each of the six numbers in the contextual sequence was ‘‘smaller’’ or ‘‘larger’’ than 50. Then, a small (10 or 20) or large (80 or 90) target number was presented visually with a varying duration (340~460ms). Participants were required to categorize each target as a short, medium, or long duration.
RESULTS: The perceived durations increased with physical durations significantly. The NTA effects, i.e., the over-/under- estimation of the durations of perceptual large/small numbers, were observed only during small, but not large or mixed magnitude context. More critically, the interaction of numerical context and target magnitude was significant. Large targets preceded by small magnitude context were rated as lasting longer, relative to large magnitude context. Whereas, small targets preceded by large magnitude context were rated as lasting longer, relative to small magnitude context.
CONCLUSIONS: The current results extend our understanding to the mechanism of NTA. The magnitude information existing in perceptual as well as contextual space can modulate perceived duration of a visual target and lead to a repetition suppression effect, suggesting inseparability of a hypothetic magnitude continuum across the border between physical present and contextual past. The repetition suppression effect is likely due to a reduction of neural activity of numerical representation, consistent with the neural amplitude hypothesis.

关键词:  , time perception, perceptual information, context information, repetition suppression, Number-Time Association

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