The orderly increase in the proportion of subjects who make optional reversal shifts over an age scale that now encompasses a range from 3 to 18 is confirmed. (Authors)

Approaches one aspect of the problem of applying statistical decision models to the real world'' by discussing the use of probabilistic data for decisionmaking. Argues that (1) decisionmakers have difficulty conceiving of probability distributions, (2) the concept of risk of failure'' plays a major role in choice, and (3) the format in which…

Basic mathematical concepts of Managerial Economics, a way of quantitatively analyzing and structuring the making of a business decision, are presented. Advantages and disadvantages of its use in business are discussed and several recent applications are given. (DT)

A study of probability learning using a noncontingent binary prediction situation to evaluate the effect of pretraining reinforcement schedule. (author/MB)

Task analysis, learning hierarchies, and behavioral objectives for mastery learning were used to develop elementary school curriculum materials in probability and statistics. The feasibility of the unit was measured by pre- and posttests with an instrument specifically developed for the study; analysis of data is included. (JG)

To investigate the relationship between multiple-choice and completion geometry test scores, this study used a technique for quantifying and comparing the validity of scores of different levels. (Author/DR)