Inflation of conditional predictions

Area of Science:

• Cognitive Psychology
• Decision Making
• Probability Assessment

Background:

• Assessing the likelihood of an outcome given a condition is a fundamental cognitive process.
• Previous research has explored biases in probabilistic reasoning and judgment.

Purpose of the Study:

• To investigate the phenomenon of inflated conditional predictions.
• To identify the cognitive mechanisms underlying prediction inflation.
• To examine the robustness of this inflation against interventions.

Main Methods:

• Conducted seven experiments involving participants making conditional predictions.
• Manipulated conditions to explore the influence of backward activation.
• Tested interventions designed to encourage consideration of alternative outcomes.

Main Results:

• Consistently found marked inflation in conditional predictions across experiments.
• Evidence suggests backward activation, where outcomes highlight consistent conditions, contributes to inflation.
• Inflation proved resistant to manipulations prompting consideration of alternative outcomes.

Conclusions:

• Conditional prediction inflation is a significant cognitive bias.
• Backward activation plays a role by increasing the perceived plausibility of the target outcome.
• The bias limits the consideration of alternative possibilities and is difficult to correct.