 The sparsity of research, in particular on the accuracy of first-impressions, means that social psychologists know a lot about what people think about others, but far less about whether they are right.Many attribute this to a criticism that Lee Cronbach wrote in 1955 about how impression accuracy was calculated, which resulted in a 30-year hiatus in research.During that time, psychologists focused on consensus (whether A and B agree in their beliefs about C) rather than accuracy, although Kenny has argued that consensus is neither necessary nor sufficient for accuracy.