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The Integrated Change Model (the I-Change Model) was used to analyse the general public’s need and perceptions concerning receiving information on the role of hereditary factors with regard to cancer. The results from a study in 457 Dutch adults showed that 25% correctly indicated the types of cancer where hereditary factors can play a role. Respondents, however, overestimated the role of hereditary factors causing breast cancer. Recognition of warning signs was low, as was the recognition of inheritance patterns. Participants wanted to know the types of cancer with hereditary aspects, how to recognise hereditary cancer in the family, personal risks and the steps to be taken when hereditary predisposition is suspected. The most popular information channels mentioned were leaflets, the general practitioner, and the Internet. Respondents interested in receiving information on heredity and cancer were more …