Perloff, Yarnold&Feltzer (1988) recently reported in this journal data suggesting that Type A undergraduates are more internal in their health locus of control than Type Bs, and suggest this may have implications for their health behaviour and self‐care. Data from a non‐college sample of 104 Type A and B adults were examined using the same measures, but could not replicate the findings of Perloffet al. Several reasons for the failure to replicate are discussed, including statistical power, clinical meaningfulness, and current theory on the Type A‐health behaviour relatio