Confidence and gradation in causal judgment.

Area of Science:

• Cognitive Psychology
• Philosophy of Mind

Background:

• Causal judgments, whether some causes are stronger than others, have been debated by psychologists and philosophers.
• Existing research suggests causal judgments can be multimodal, with both categorical and graded responses.

Purpose of the Study:

• To investigate the nature of causal judgments and test competing explanations for graded causal judgments.
• To determine if graded judgments stem from confidence in causal relations or a belief in graded causation itself.

Main Methods:

• Reanalysis of data from four prior studies on causal judgments.
• Experiment 1: Tested the confidence explanation by examining the relationship between confidence and judgment gradation.
• Experiment 2: Tested the causal strength explanation, assessing the influence of normality, causal structure, and candidate causes on judgments.

Main Results:

• Causal judgments were found to be multimodal, exhibiting both categorical and graded patterns.
• Confidence significantly moderated judgment gradation: lower confidence led to more graded judgments, while higher confidence led to more categorical judgments.
• The causal strength explanation was partially supported, as confidence did not fully account for variations in judgments influenced by normality, causal structure, or the number of candidate causes.

Conclusions:

• Causal judgments are multimodal, reflecting both categorical and graded assessments.
• Graded causal judgments arise from both uncertainty about a cause's role and the perceived weakness of a cause.
• Confidence plays a crucial role in modulating the degree of gradation in causal judgments.