Presented are some notes concerning the lower bound used in entropy prediction experiments. An explicit proof valid for an ideal prediction, adding a negative proof for general experimental conditions is demonstrated. The general validity of the lower bound has been thus denied, reflecting some potential sources of distortion. (2 references)…

Extremely productive researchers tend to have a larger number of informal contacts with other scientists than do most members of their specialty. (AL)

Several possible models for use in attitude scaling are defined and discussed in some detail. Unfolding analysis is illustrated. (DG)

This method of generating multivariate data differs from previous techniques in that it uses Crout factorization to develop the desired variance-covariance matrix. (Author/CK)

This article describes a model icosidodecahedron made from cardboard and used as a lampshade. (MM)

New model formulations and solution methods are given for the Journal Selection Problem. The results are developed in a framework that can also accommodate problems with a somewhat different structure than the Journal Selection Problem, thus providing new solution strategies for these problems as well. (32 references) (Author/NH)

Illustration of salary schedules to replace the rigidity of the fixed step salary schedule for school personnel. (Author/RA)

Reviews research concerning the contributions of mathematical models, concept-learning studies and studies in individual differences to experimental methodology in psychology. Includes implications, problems, and basic issues. (MB)

Study was first presented at the annual invitational address to Division 20, Maturity and Old Age, at the meeting of the American Psychological Association, August 30, 1968. (MS)