What Is Minimal Change Disease?

Least change method (limit method, sequence exploration method, least noticeable difference method, least difference method)

Minimal change

Right!

Minimal change method

+ (Comparative stimulus is greater than standard stimulus);-(comparative stimulus is less than standard stimulus); = (comparative stimulus is equal to standard stimulus);? (Participants expressed doubts when comparing)

1. Calculate the threshold of each stimulus series. The end points of the two stimulus intensities corresponding to the turning points of the subjects' responses are the thresholds of this series;

2. Find the mean of all series of thresholds, and finally find the absolute threshold

Lu: the end point of the decreasing series from the last '+' to the non-'+' is the upper limit of the difference threshold (or the midpoint between the first non-'+' and '+' of the increasing series); Ll: the decreasing series The midpoint between the first non -'- 'and'-'is the lower limit of the difference threshold (or the midpoint between the last'-'and non -'-' of the increasing series); Iu: between the upper and lower limits The distance is the uncertain distance; the midpoint of the uncertain distance is the subjective equal point (PSE); the standard stimulus (St); the common error (CE); half of the uncertain distance or the upper difference threshold (DLu) and the lower difference threshold Half of the sum of (DL1) is the difference threshold (DL).

DLu = Lu-St; DLl = St-Ll; PSE = (Lu + Ll) / 2; CE = St- PSE;

DL = [(Lu-St) + (St-Ll)] / 2 = (DLu + DLl) / 2 = (Lu-Ll) / 2

Habit and expectation errors, practice errors and fatigue errors

1. Yang Zhiliang, Wang Xinfa. Mental Experiment Instruction Manual. Shanghai: East China Normal University Press. 2008.9: 56-57

2. Guo Xiuyan. Experimental psychology.