What makes a man similar to a tie? Stimulus compatibility with comparison and integration.

We argue and show that different properties of stimuli are compatible with different types of processing. Specifically, object pairs from the same taxonomic category (e.g., chair-bed) tend to be alignable and thus compatible with comparison, whereas object pairs that play different roles in thematic relations (e.g., chair-carpenter) tend to be nonalignable and compatible with integration. Using object pairs that varied orthogonally in alignability and thematic relatedness, we demonstrated that stimulus compatibility modulates processing and affects the outcomes of tasks that are currently believed to involve only comparison (similarity ratings, Experiment 1; listing commonalities and differences, Experiment 2) or only integration (thematic relatedness ratings, Experiment 3). Our findings and others that we have reviewed suggest that: (1) many cognitive tasks involve both comparison and integration, and (2) the relative influence of each process is modulated by an interplay between the task-appropriate and the stimulus-compatible process. We believe that single-process models should be extended to take this interplay into account. Copyright 1999 Academic Press.