The investigators aim at comparing the perceived clarity of personal values in men considering PSA screening using decision aids with no VCM versus an implicit VCM versus an explicit VCM. This study will add to the body of evidence on the role of decision aids to support health preference-sensitive choices and provide further insight on the impact of different methods for eliciting people's values embedded within a decision aid.
Inclusion Criteria: * adult men (50 - 69 years); * men with average risk for prostate cancer; * willing and able to provide written informed consent. Exclusion Criteria: * unable to understand written Portuguese.