心理学报 ›› 1996, Vol. 28 ›› Issue (4): 419-424.
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陈文熙
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通讯作者:
Chen Wenxi;(Shanxi Mining Institute,Taiyua,030024)
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摘要: 本文以神经生理学为基础,结合感官具有调节和比较两功能的实用性,建立起刺激在大脑皮层上引起感知效应E的数学模型:E=Blog(1+kI),其中k=I ̄(-b)/a。从此出发,可推出中等以上刺激的差别阈判据:△EM=恒量。将此判据推广到弱刺激,即得到差别阈的普适规律:△I/(I+aI ̄b)=N,亦即韦伯定律的修订公式。从弱到强的广大刺激范围内,它都能与实验数据拟合良好。
关键词: 韦伯比, 差别阈, 数学模型
Abstract: The present paper begins with constructing a mathematical model for cortex effect E caused by stimulus code along the afferent channel.The model E=Blog(1+kI),k=I ̄(-b)/a in terms of stimulus intensity I is based on neurophysiological experiments and the practicality of receptor functions acquired in the long run of evolution.Accordingly, the criterion of difference limen for moderate stimuli has been shown to be △E=constant, which, being generaized to weak stimuli,leads to a resonable extension of Weber's law:△I/(I+aI ̄b)=constant N,which is valid to weak and strong stimuli. Thus the old problem over a hundred years ago concerning extend of the validity of Weber’s law to include weak stimuli seems to be more or less settled.
Key words: Weber ratio, difference limen, mathematical model
陈文熙. (1996). 韦伯比的拟合公式. 心理学报, 28(4), 419-424.
Chen Wenxi,(Shanxi Mining Institute,Taiyua,030024). (1996). AN ANALYTICAL EXPRESSION OF WEBER RATIO. , 28(4), 419-424.
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链接本文: https://journal.psych.ac.cn/xlxb/CN/
https://journal.psych.ac.cn/xlxb/CN/Y1996/V28/I4/419