The experimental program and calculation process of minimum change method explain the meaning of sensory threshold in detail, but it is easy to produce habit error and expectation error. The experimental results of constant stimulation method can be used in many mathematical calculation methods, which is convenient for comparison with other methods for measuring sensitivity.

The minimum change method is a method to measure the threshold directly, which is characterized by changing the stimulus in a series of incremental or decreasing steps at equal intervals, and seeking the position of the instantaneous transition point or threshold from one reaction to another.

Extended data:

Lu: The endpoint between the last "+"and the non-"+"in decreasing series is the upper limit of the difference threshold (or the midpoint between the first "+"and "+"in increasing series); Lh: The midpoint between the first non-in decreasing sequence is the lower limit of the difference threshold, or the midpoint between the last non-in increasing sequence.

Iu: the distance between the upper limit and the lower limit is uncertain; The midpoint of the uncertain interval is the subjective equipartition point (PSE); Standard stimulus (ST); Common errors (ce); The difference threshold (DL) is half of the uncertainty interval or half of the sum of the upper limit difference threshold (DLU) and the lower limit difference threshold (DLL).

Baidu Encyclopedia-Minimum Change Method