Mean peak magnitude of the response to each stimulus type was used to describe the physiological responses measured
by electrodermal activity. In computing the mean magnitude of response to each stimulus type, cases of non-response (i.e.,
no response after presentation of a stimulus) were included. When multiple responses occurred to a single stimulus, only the
amplitude of the largest peak was used. Since magnitude data were positively skewed, a logarithmic transformation was
applied to the data before analysis (Boucsein, 1992; Dawson et al., 1990). A value of 1 was added to all magnitudes before the
transformation was performed, because the log of zero (a non-response) is undefined.