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Acta Psychologica Sinica    2013, Vol. 45 Issue (4) : 438-445     DOI: 10.3724/SP.J.1041.2013.00438
Neural Basis of Behavioral Sex Difference during Local Image Generation
ZHAO Qingbai;ZHANG Xiaofei;SUI Danni;ZHOU Zhijin;CHEN Qicai;ZHOU Zongkui
(1 Key Laboratory of Adolescent Cyberpsychology and Behavior (CCNU), Ministry of Education, Wuhan 430079, China) (2 Key Laboratory of Human Development and Mental Health of Hubei Province, School of Psychology, Central China Normal University, Wuhan 430079, China) (3 Foreign Language College of Shenyang University, Shenyang, 110044, China) (4 College of Life Science, Central China Normal University, Wuhan, 430079, China)
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Abstract  Previous behavioral studies reported that females performed faster than males in generating the local details of image. However, the neural basis of behavioral sex difference during local image generation is not clear. Generally, reaction time is considered as an index of speed of brain information processing. And the small-world topology of functional brain connectivity could provide high global and local efficiency of parallel information processing. Therefore, it was speculated that stronger small-world effect underlay females’ faster reaction time during local image generation. Total 28 people (14 males and 14 females) participated in the experiment and they were informed to observe a set of experimental pictures and then generate corresponding mental image to the global or local cue. The reaction time and event-related potential were recorded. The behavioral and electrophysiological data obtained in the experiment were analyzed by ANOVA and small-world measures, respectively. Results showed that females had the shorter reaction time, the smaller P300-650 amplitude and the shorter average path length of brain network in local image generation. Additionally, there was a positive correlation between the reaction time and the average path length. The present findings suggested that the lower cost and higher efficiency of brain information processing supported the better behavioral performance.
Keywords image generation      sex difference      event-related potential      small-world network      average path length     
Corresponding Authors: CHEN Qicai;ZHOU Zongkui   
Issue Date: 25 April 2013
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ZHAO Qingbai;ZHANG Xiaofei;SUI Danni;ZHOU Zhijin;CHEN Qicai;ZHOU Zongkui. Neural Basis of Behavioral Sex Difference during Local Image Generation[J]. Acta Psychologica Sinica,2013, 45(4): 438-445.
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