Reaction potential and the intervening variable question

Hullian theory and thurstone's judgment model

“…This approach is very roughly analogous to the substitution of judgment-time for the judgment itself in classical psychophysics (see Guilford, I 954, p. 145) though in the latter procedure one is still concerned with the time taken to make a choice between two stimuli (or response classes). In contrast, we are here concerned with a theoretical parallel between the models, when both are considered as models for response choice, and the argument is closely related to a previous discussion of the methodological status of reaction potential (McDonald, 1960). A careful examination of the details of Hull's quantification attempt, especially on the statistical side, remains to be done, but this would take us too far afield.…”