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Acta Psychologica Sinica
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The Optimal Size of Material in Psychological Experiment: The Applications of Multivariate Generalizability Theory
LUO Zhaosheng;GUO Xiaojun
(School of psychology, Jiangxi Normal University, Nanchang 330022, China)
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Abstract  

The validity and reliability must be guaranteed to any psychological experiment. The size of experiment material is a critical factor that will significantly affect the results of experiment. This paper aims to study the selection of optimal size of the psychological experiment material under the frame of multivariate generalizability theory. The results show that, with the IAT experiment, 50 will be the optimal size of each combined tasks, and the reliability will be 0.905; with the Picture-word Interference Paradigm, when the material size is about 48, the reliability will be 0.954; with the Cue Paradigm, when the number of valid cue is 50%, the optimum size of valid cue and invalid cue is about 35, and the reliability will be 0.973. This study shows that MGT can help us to select an optimal size of the psychological experiment material.

Keywords multivariate generalizability theory      the reliability of experiment      size of experiment material     
Corresponding Authors: GUO Xiaojun   
Issue Date: 30 June 2014
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Cite this article:   
LUO Zhaosheng,GUO Xiaojun. The Optimal Size of Material in Psychological Experiment: The Applications of Multivariate Generalizability Theory[J]. Acta Psychologica Sinica, 10.3724/SP.J.1041.2014.00876
URL:  
http://journal.psych.ac.cn/xlxb/EN/10.3724/SP.J.1041.2014.00876     OR     http://journal.psych.ac.cn/xlxb/EN/Y2014/V46/I6/876
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[2] Yang Zhiming,Chang Lei (Department of Educational Psychology, The Chinese University of Hong Kong). A STUDY ON PUTONGHUA TESTING BY MULTIVARIATE GENERALIZABILITY THEORY[J]. , 2002, 34(01): 51-56.
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