In Dawes's (1971) research, it was found that using a proper linear model of expert judgments could improve the accuracy of predictions in graduate admissions decisions. However, the confidence in expert judgments may overshadow research findings and dominate predictions. Another experiment showed that having more knowledge does not necessarily lead to more accurate predictions, as seen in clinical predictions based on psychological test results. The success of prediction mediated by theory depends on access to major causal influences and accurate measuring instruments.