Enhancing semantic congruity effects with category-contingent comparative judgments.

Area of Science:

• Cognitive Psychology
• Decision Science

Background:

• Semantic congruity effects (SCEs) describe how the relationship between stimulus meaning and response direction influences decision-making.
• Conventional instructions in comparison tasks do not typically involve category-based contingencies.

Purpose of the Study:

• To investigate how category-contingent instructions affect response times and SCEs.
• To compare the explanatory power of evidence accrual models versus single-sample stage models for SCEs.

Main Methods:

• Two experiments were conducted involving binary comparisons.
• Experiment 1: Participants compared animal sizes from memory under congruent and incongruent category conditions.
• Experiment 2: Participants compared visual line lengths, with comparison direction contingent on line length category (short/long).

Main Results:

• Response times were significantly increased under category-contingent instructions compared to non-contingent instructions.
• Semantic congruity effects (SCEs) were substantially amplified under category-contingent conditions.
• The observed amplification of SCEs aligned with predictions from evidence accrual models.

Conclusions:

• Category-contingent instructions enhance semantic congruity effects in decision-making.
• Findings support evidence accrual models of decisional processing.
• Single-sample stage models do not adequately explain the observed amplification of SCEs.