Anchoring and Judgment Bias: Disregarding Under Uncertainty

Area of Science:

• Cognitive Psychology
• Behavioral Economics

Background:

• Decision-making relies on cognitive processes, often influenced by memory heuristics.
• The availability heuristic suggests information easily recalled impacts judgments.
• Anchoring effects occur when individuals use initial information (anchors) as reference points for frequency judgments.

Purpose of the Study:

• To investigate cognitive processes in decision-making, specifically the impact of the availability heuristic and anchoring effects.
• To determine if individuals can disregard explicit numerical anchors, even when instructed.
• To examine differential effects of high versus low anchors on subjective judgments.

Main Methods:

• Experimental design to test anchoring effects on frequency judgments.
• Inclusion of explicit instructions to disregard experimenter-supplied anchors.
• Comparison of responses to high and low anchors.

Main Results:

• Participants failed to disregard high anchors despite explicit instructions.
• Participants successfully disregarded low anchors.
• Instructions to disregard anchors generally reduced their influence, but not completely.

Conclusions:

• Anchoring effects persist even when individuals are explicitly told to ignore the anchor.
• The magnitude of the anchor influences the ability to disregard it.
• Findings support dual-process models of cognition, distinguishing intuitive and reasoned judgments, and theories like selective accessibility and numerical priming.