“…Using a vignette methodology in a small sample of trainee psychologists, Palma and Iannelli examined the impact of experimentally manipulating a hypothetical client's risk behaviour on decision making. Confidentiality was more likely to be broken when hypothetical clients did not use protection during intercourse, than when protection was used (Palma & Iannelli, 2002). However, as this study did not measure risk perceptions, it is not clear if the patient's behaviour is influencing decision making because the risk to the partner is judged to be elevated or because of other judgment biases relating to a HIV patient not using protection during intercourse (e.g., negative attitudes, stereotypes of carelessness, perceived lack of consideration).…”