ABSTRACT
In 1976, Jeanne Block wrote a response to Maccoby and Jacklin’s (1974) review of sex differences that was virtually ignored. Block reviewed the same literature and arrived at conclusions very different from the ones reached by Maccoby and Jacklin. First, she noted that Maccoby and Jacklin did not censor the studies they included; that is, they averaged across all studies, whether methodologically sound or not. A number of studies had very small samples, a problem just noted. Some studies used unreliable instruments; other studies used instruments that lacked construct validity , meaning there was not sufficient evidence that the instruments measured what they were supposed to measure.
