When subjects learned paired associates that, on the study trials, consisted of a stimulus (cue) and its correct (target) response plus two other (distractor) responses from within the list, the presence of the distractor items interfered with learning, especially when overtly pronounced as opposed to silently studied. (Editor)

In this report, three theories of transitive inference are compared as they apply to the solution of linear syllogisms: a spatial theory, a linguistic theory, and a new mixed linguistic-spatial theory. Each theory is expressed in terms of an information-processing (flow chart) model and a mathematical model that quantifies the…