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threshold
Threshold Differences in Weight Perception
Experimental Psychology (PSYC 3070)

Aina Sofia binti Muhamad Ali (1011816)
Atikah binti Ishak (1015168)
Hamed Shafiul Haque (1027057)
Nurul Atikah binti Azmi (1018156)
Shaqira Afina binti Mohd Azman (1021348)
Siti Hajar binti Norhan (1024812)

13 March 2014
Paper submitted as partial fulfilment of requirement for PSYC 3070 Experimental Psychology, Section 3, instructed by Dr. Harris Shah Abdul Hamid at the Department of Psychology, International Islamic University Malaysia, Semester 2, 2013/2014.
Abstract
This paper is a report on an experiment conducted with the aim to find out whether the value of difference threshold is equal to the proposed theory of Weber’s law. This present paper is also interested in investigating on the extent to which the threshold may occur. The difference threshold in this study is determined by using the basic idea of Weber’s law in which the constant is 0.02. Thirteen participants (five male and eight female) students have been selected by using convenience sampling. By using independent group designs (between subject designs), the participants have been exposed to a different testing factor (constant weight and random weight) at once. For the result, Weber’s constant was calculated by using the formula ΔI / I = k. Two graphs were presented to show the result and the comparison between both graphs showed that there is no relationship exists because there is no upper threshold found.

Introduction The study on threshold is not the new area in our life nowadays. Expert has study the function of threshold broadly in many areas of computer sciences and technologies such as in Boolean circuit (Babai, Hanse, Podolskii & Sun, 2007) and Power Assist Robot System (PARS) (Rahman et. al, 2010). The concept of threshold is that the differences of constant fractional relations of two intensities will produce the difference threshold (Hecht,



References: Babai, L., Hansen, K.A., Podolskii, V.V., & Sun, X. (2007). Weight of exact threshold function. National Basic Research, 1(1), 1-24. Holden, K.J., Francisco, E.M., Zhang, Z., Baric, C., & Tommerdahl, M. (2011). An undergraduate laboratory exercise to Weber’s Law. The Journal of Undergraduate Neuroscience Education, 9(2), A71-A74. Oberlin, K.W. (1935). Variation in intensitive sensitivity to the lifted weight. Psychological Review, 7(1), 438-455. Rahman, S.M.M., Ikeura, I., Shinsuke, I., Hayakawa, S., & Sawai, H. (2010). Psychophysical relationship between actual and perceived weights for lifting objects with power-assist: Consideration of constrained and unconstrained lifting. SI International. 152-157 Shen, J., & Jung, Y.M. (nd). Weberized mumford-shah model with bose-einstein photon noice. Applied Mathematics, 94(8), 1-25. Teghtsoonian, R. (1971). On the exponents in Steven’s law and the constant in Ekman’s law. Psychological Review, 78(1), 71-80.

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