Asymmetrical genetic attributions for the presence and absence of health problems.

Objective: Recent research has suggested that people more readily make genetic attributions for positively valenced or desirable traits than for negatively valenced or undesirable traits-an asymmetry that may be mediated by perceptions that positive characteristics are more 'natural' than negative ones. This research sought to examine whether a similar asymmetry in genetic attributions would emerge between positive and negative health outcomes.

Design: Across seven experiments, participants were randomly assigned to read a short vignette describing an individual experiencing a health problem (e.g. hypertension) or a corresponding healthy state (e.g. normal blood pressure).

Main Outcome Measures: All participants provided ratings of naturalness and genetic attributions for the outcome described in their assigned vignette.

Results: For diagnoses other than addictive disorders, participants rated the presence of a diagnosis as less genetically caused than its absence; for addictive disorders, the presence of a diagnosis was rated as more genetically caused than its absence. Participants consistently rated the presence of a health problem as less natural than its absence.

Conclusion: Even within a single domain of health, people ascribe differing degrees of 'naturalness' and genetic causation to positive versus negative health outcomes, which could impact their preferences for treatment and prevention strategies.