Saltation through the blind spot

At least three localization illusions can be produced by varying the time relations between two stimuli. Two of these, phi motion and Békésy’s illusion, have been induced in areas lacking receptors. To learn if this also occurred with the third illusion, sensory saltation, people reported their observations when Geldard’s visual rabbit was induced by stimulating points around the optic disk. The rabbit crossed the blind spot as well as other portions of the eyes, and the illusory point was often localized within the region of the blind spot. All three illusions can be localized in an area devoid of receptors.     

Relations between level of ego development and adjustment pattern in adolescents

The present study was designed to assess the relation between Loevinger's hierarchy of ego development stages, measured by the Washington University Sentence Completion Test, and adjustment patterns as measured by the Minnesota Multiphasic Personality Inventory. A total of 150 high school students between the ages of 14 and 15, 75 boys and 75 girls, served as subjects. It was hypothesized that certain adjustment patterns were more prevalent at certain points of the ego development hierarchy than at others, specifically: (a) hypochondriasis and psychopathic deviance at the ego stages below conformity; (b) hysteria at the conformist ego level; and (c) obsessive-compulsiveness and paranoia at the ego stages above conformity. All of these hypotheses, except that regarding psychopathic deviance, were supported by the data. One unpredicted relationship, a tendency for depression to be most characteristic of the conformist ego group, was found.     

Long-term predictive validity of the WPPSI: An 11-year follow-up study

As part of a longitudinal study, a control group of 85 children were tested on the WPPSI at 5$\text{1}\text{2}$ years and the WISC-R at 16$\text{1}\text{2}$ years. Educational attainment was also assessed in adolescence. Data are presented illustrating the long-term predictive validity of the WPPSI. The Full Scale IQs on the two tests intercorrelated +0.86.     

Male teacher effects on young children: A theoretical and empirical consideration

The argument has been frequently made that an increase in the number of male teachers working at the early school levels would reduce the number of school-related problems for boys. This argument is evaluated in the context of two major theories of sex-role development, the social learning and cognitive developmental theories, and the results of an examination of the studies of children's performance and development in relation to teacher's gender. The hypothesis that male teachers reduce boys' problems in school does not receive much support empirically or theoretically.This work was supported by a grant from the Quebec Department of Education to the first author.     

Team Semantics for Interventionist Counterfactuals: Observations vs. Interventions

Journal of Philosophical Logic - Team semantics is a highly general framework for logics which describe dependencies and independencies among variables. Typically, the (in)dependencies considered...     

Elusive Propositions

Journal of Philosophical Logic - David Kaplan observed in Kaplan (1995) that the principle $\forall p \Diamond \forall q (Qq \leftrightarrow q = p)$ cannot be verified at a world in a standard...     

Closed Structure

Journal of Philosophical Logic - According to the structured theory of propositions, if two sentences express the same proposition, then they have the same syntactic structure, with corresponding...