ラットにおける間隔二等分課題の反応潜時

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Title ( jpn )
ラットにおける間隔二等分課題の反応潜時
Title ( eng )
Study of Response Latencies of Interval Bisection Task in Rats
Creator
Nakamura Yuta
Source Title
広島大学大学院総合科学研究科紀要. I, 人間科学研究
Bulletin of the Graduate School of Integrated Arts and Sciences, Hiroshima University. I, Studies in human sciences
Volume 12
Start Page 27
End Page 37
Abstract
Interval timing, whose range is from a second to several minutes among the sense with respect to time, is related with feeding behavior, decision making and time estimation of animals. In this study, we used interval bisection task, which is a method for examining this interval timing quantitatively. First, rats learned left and right lever pressing associated with the tone stimuli of 2 seconds and 8 seconds for each. Second, probe stimulus tones (e. g. 2.5, 3.2, 4, 5, 6.4 seconds) were presented, and we observed which lever rats selected. When the proportion of the lever pressing associated with the 8 seconds tone is 50%, the point of subjective equality (PSE) can be obtained. The PSE is an indicator of decision making in time perception. In order to investigate whether the difference in the physical properties of the stimulus affects the time perception, we used two kinds of tones, a continuous tone and a 4 Hz pulse tone. The results suggest that the difference in physical properties between continuous tone and 4 Hz pulse tone does not affect time perception. As another index, response latency of lever pressing for each tone presented in the task was calculated. As a result, at the testing stage, a peak in a distribution of response latency was around 3.2 seconds or 4 seconds of probe stimulus. The durations of the peak was similar to PSE. From these results, it was suggested that response latency is an important indicator in decision making of which lever selected.
Keywords
timing
Interval bisection task
response latency
rats
NDC
Psychology [ 140 ]
Language
jpn
Resource Type departmental bulletin paper
Publisher
広島大学大学院総合科学研究科
Date of Issued 2017-12-31
Rights
掲載された論文,研究ノート,要旨などの出版権・著作権は広島大学大学院総合科学研究科に帰属する。
Copyright (c) 2017 Graduate School of Integrated Arts and Sciences, Hiroshima University, All rights reserved.
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 1881-7688
[NCID] AA12198647