Abstract This paper Is a report on an experiment conducted with the alma to find out whether the value of deference threshold Is equal to the proposed theory of Weeper’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 Weeper’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 deferent testing factor (constant weight and random weight) at once. For the result, Weeper’s constant was calculated by using the formula AAA / 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. 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 (Babe, Hansen, Photolysis & Sun, 2007) and Power Assist Robot System (PARS) (Raman et. Al, 2010). The concept of threshold is that the differences of constant fractional relations of two intensities will produce the difference threshold (Yecch, 1924). According to Holder et al (201 1), it is hard to quantify the intensities of two objects unless there is a large difference in the intensity between the two objects.
Oberlin (1935) noted that the sensitivity of the lifted weight is increase in the time that the threshold is decrease. These minimum amounts that can be detected by people are known as “Just noticeable different NOD)” (Holder, 2011). JNI occurred when the perception were below the conscious awareness of human brain (Thomas, 2007). Human can only detect the differences of two weights if the objects are more than ten percent difference (Raman et. Al, 2010). One of the techniques to measure JNI is the Weeper’s Law developed by Theodore Freshener (Holder, 2011).
Weeper’s law has been extensively applied in mathematical model in which it has been categorized into two types: (1) algorithm simulation and (2) biochemical simulation (Sheen & Jung, ND). Weeper’s law been applied in the field of psychology and psychophysics (Sheen & Jung, ND), the Weeper’s constant is 0. 02 (Testimonial, 1971). Thus, present study will use this basic idea of Weeper’s law to find out the difference threshold. Present study hypothesized that the observed ‘k (Weeper’s constant) is equal to 0. 02. The objective of this study is to find out whether the value of difference threshold is equal to the proposed theory of Weeper’s law.
Besides, present study is also interested to investigate on the extent to which the threshold may occur. Method Participants Thirteen participants (five male and eight female) students have been selected by using convenience sampling. Eleven of them were majoring in Psychology, one majoring in Sociology and the other one was Mechanization Engineering student. The participants represent a variety year of study from second to fourth year students. Design The present study use independent group designs (between subject designs). In this (constant weight and random weight) simultaneously.
This design saves a great deal of time (Sealskin, 2009). Materials Researchers have set two groups of weights in which the first weight have been set to be constant and the second weights have been randomly chosen by the researchers to be paired with it. Since the researchers conducted the experiment twice, the constant weight has been set to be 100 and 200. The second weights have been arranged by the researchers by dividing it into upper interval and lower interval. The difference between each interval was five. For example, if the constant weight was 100, the lower interval weights were 95, 90 and 85.
Besides, for the upper interval, the eights were 105, 110, 115 and 120. Procedure The participants have been given two weights and have to grip the weight with their hands. Participants were asked to indicate which weights were heavier and lighter. If both weights seem have the same weight, they need to mention it. The answer been recorded by experimenter in the form provided. The participants also have been provided with refreshment after the trials completed. All the answer was analyzed based on Weeper’s law and the data was present using line graph. Data Analysis and Results
To analyze the data, two graphs have been arranged to show the probability that the participants can detect the increases and decreases of weight in four trials. After each trial was completed, a graph of the mean scores from the four trials versus weight difference has been generated for the study. The mean of the four trials weight differences are used as the difference threshold. The subject’s difference threshold was determined for each test, and data was subsequently collected from two groups which are 5 students in the group 1 and 8 students in the group 2. (n=13).