When 149 students were randomly assigned to read one of six vignettes depicting a person with either schizophrenia, bipolar disorder, or major depression, with either a genetic or environmental causal attribution, researchers from the Universities of Wyoming and Oregon found that genetic attributions for schizophrenia (but not affective disorders) lead to a greater desire for social distance, due to perceived dangerousness, and a decreased willingness to help.
Lee, A., Laurent, S., Wykes, T., Andren, K., et al; Genetic attributions and mental illness diagnosis: effects on perceptions of danger, social distance, and real helping decisions. Social Psychiatry and Psychiatric Epidemiology. September, 2013. DOI: 10.1007/s00127-013-0764-1