difference threshold

Significant Difference Threshold.--The difference between repeat values that your laboratory defines as significant for that test.

For each repeated critical test result, participants reported the following information: initial and repeat test result; time initial and repeat results were first known to laboratory staff; critical result notification time; if the repeat result was still a critical result; if the repeat result was significantly different from the initial result, as judged by the laboratory professional; significant difference threshold, as defined by the laboratory; and which instrument was used for initial and repeat testing (primary versus secondary instrument).

Based on Weber's law, it was predicted that as the stimuli in the present study became more symptomatic of melanoma, absolute difference thresholds would increase.

In psychophysical terms, this "smallest change" may be called a difference threshold.

The use of MCS in measuring body size has been employed in only one study (Gardner et al., 1989d), which demonstrated the efficacy of this method for determining participants' PSE and difference threshold. The PSE is that point where the video image appears to the participant to be subjectively equal to what s/he perceives his or her body size actually to be, while the difference threshold represents the amount of size distortion that must be present for the sensation to be detected.

The perceptual component or difference threshold in the method of limits can also be determined.