Covariation bias, classical conditioning, and phobic fear

Area of Science:

• Cognitive Psychology
• Clinical Psychology
• Psychophysiology

Background:

• Phobias are characterized by irrational fears and avoidance behaviors.
• Illusory correlation (IC) may play a role in maintaining phobic beliefs.
• Understanding cognitive biases in phobias is crucial for effective treatment.

Purpose of the Study:

• To investigate illusory correlation (IC) between phobia-relevant stimuli and aversive events in spider phobics.
• To examine if cognitive biases in phobics are modulated by behavioral treatment.
• To explore the link between covariation bias and psychophysiological responses.

Main Methods:

• Nineteen treated and 19 untreated spider phobics viewed slides of spiders, weapons, and flowers.
• Slides were randomly paired with shock, siren, or no outcome.
• Contingency estimates, outcome expectancies, and electrodermal responses (FIR, TIR) were recorded.

Main Results:

• Untreated phobics significantly overestimated the spider-shock contingency.
• This illusory correlation bias was resistant to extinction.
• Treated phobics did not exhibit this covariation bias, suggesting treatment efficacy.
• Covariation bias correlated with heightened electrodermal responses on phobia-relevant trials.

Conclusions:

• Phobic individuals exhibit a fear-confirming information processing style.
• Illusory correlation is a significant cognitive bias in untreated phobias.
• Behavioral treatment can effectively modulate and reduce these maladaptive cognitive biases.