Cognitive complexity explains processing asymmetry in judgments of similarity versus difference

Area of Science:

• Cognitive Psychology
• Human Judgment and Decision Making

Background:

• Human judgments of similarity and difference can be asymmetrical.
• The theoretical basis for this asymmetry, particularly why similarity judgments are more sensitive to relational overlap than difference judgments, is not well understood.

Purpose of the Study:

• To investigate the cognitive complexity underlying judgments of similarity and difference.
• To test the hypothesis that asymmetries arise from the type of information processed (relations vs. features) and the comparison process (similarity vs. difference).

Main Methods:

• Experiment 1 involved verbal (word pairs) and visual (geometric shapes) comparisons, assessing similarity and difference judgments.
• Participants evaluated unambiguous and ambiguous trials, with ambiguity based on featural versus relational information.
• Experiment 2 used complex story stimuli to replicate findings.

Main Results:

• Participants experienced more difficulty detecting relational differences compared to relational similarities.
• When judging similarity, participants emphasized relational information more than when judging difference.
• This pattern was consistent across verbal, visual, and narrative stimuli.

Conclusions:

• Cognitive complexity in processing relations and assessing difference contributes to judgment asymmetry.
• Relational information is weighted more heavily in similarity judgments than in difference judgments.
• A computational model supports these findings, highlighting differential weighting of relational information.