Interactive Beliefs about Genes and Behavior Predict Improved Sun Protection Following Melanoma Genetic Counseling

Area of Science:

• Behavioral genetics
• Cancer prevention
• Health psychology

Background:

• Limited understanding of how individuals in cancer-prone families perceive genetic determinism and the role of personal behavior in disease risk.
• Investigating these beliefs is crucial for effective communication regarding genetic risks and management strategies.

Purpose of the Study:

• To assess beliefs about the impact of behavior on genetic risk (interactive, subtractive, deterministic) in unaffected members of melanoma-prone families.
• To examine if these beliefs predict changes in perceived control, motivation, and sun-protection behavior one year post-genetic counseling.

Main Methods:

• Surveyed 114 unaffected members of melanoma-prone families undergoing genetic counseling.
• Assessed beliefs: interactive (behavior amplifies risk), subtractive (behavior reduces risk), and deterministic (genes primarily determine outcomes).
• Evaluated changes in perceived control, motivation, and sun-protection behavior one year later.

Main Results:

• Participants strongly endorsed interactive and subtractive beliefs, but not deterministic ones.
• Interactive beliefs predicted sustained increases in personal control, motivation, and sun-protection behaviors.
• Subtractive beliefs were linked to increased personal control, motivation, and sunscreen use; deterministic beliefs showed no significant association.

Conclusions:

• Beliefs that unhealthy behaviors can amplify genetic risk are particularly effective in motivating behavioral risk reduction among those at high hereditary cancer risk.
• Findings highlight the importance of interactive belief models in genetic counseling and risk management interventions.