She states that many studies of psychological gender differences are controversial and subject to error, observing that many results from smaller scale studies are not repeated in larger studies and that self-report questionnaires are vulnerable to bias.
Many results from smaller scale studies are not repeated in larger studies. This is what many studies of psychological gender differences are controversial and subject to error, observing. This is what she states. Many results from smaller scale studies are not repeated in that self. This is what many studies of psychological gender differences are controversial and subject to error, observing. This is what she states. Report questionnaires are vulnerable to bias.