Sequences of similarity judgments as time series

Sequences of similarity judgments made to pairs of geometrical patterns with three variable elements were obtained from 22 subjects. Each subject made 100 judgments to a series which embodied random input, step transitions and impulse shifts. Three different instructions concerning the use of information from previous trials were used. Time series analyses gave linear transfer function coefficients whose ratios reflected the strategy employed by a subject. Evidence of local nonstationarity in the response gain functions is examined.