The role of expectancy in comparative judgments.

Area of Science:

• Cognitive Psychology
• Human Information Processing
• Relational Learning

Background:

• The congruity effect describes difficulties in judging relative magnitudes in linear orders.
• Existing explanations, like the expectancy hypothesis, link this effect to the order of stimulus and comparative presentation.

Purpose of the Study:

• To investigate if the congruity effect is maintained when the comparative term follows the stimulus pair.
• To determine if stimulus dimension salience influences the magnitude of the congruity effect.

Main Methods:

• Two experiments were conducted presenting stimulus pairs before or after the comparative term.
• Stimuli varied in dimension salience (salient vs. nonsalient) to test its role.

Main Results:

• An equivalent congruity effect was observed regardless of whether the comparative preceded or followed the stimulus pair.
• The magnitude of the congruity effect remained consistent across both salient and nonsalient stimulus dimensions.

Conclusions:

• The findings suggest that the congruity effect is not solely dependent on the expectancy generated by the order of presentation.
• The results challenge expectancy-based accounts and indicate a more robust mechanism underlying relational information processing.