Several skills important to successful learning by discovery were found to be less essential to successful learning by rule. Results also supported the hypothesis that the outcome of discovery is the structural integration of previously known concepts, while the outcome of rule learning is the addition of new structure. (Authors)

This article makes a plea for the greater use of non-parametric methods in introductory statistics courses. (MM)

From a paper presented at the annual meeting of the Association of American Law Schools on December 28, 1969 on the subject of preventive detention and criminal justice. (IR)

Forty-eight participants read one of three texts (high explanatory, low explanatory, and standard) that varied in the degree of explanation of basic concepts of elementary probability. Performance test data showed that participants in the high-explanatory test condition did equally well on both formula and story problems. (Author/LC)

Presents and discusses the results of research into similarity measures for search request formulations which employ Boolean combinations of index terms. The use of a weighting mechanism to indicate the importance of attributes in a search formulation is described. A 16-item reference list is included. (JL)

A novel solution to the statistical problems in an evaluation of rare events is described. The significance of variations in the number of child homicides is analyzed in a binary time series of "active" months for monitoring future incidence and related systemic events. (Author/CM)

Results show that the proposed sampling distribution of the test appears to be appropriate only for sample sizes above 50, and for data where the sample size is 10 times the number of variables. For such cases the power of the test is found to be fairly low. (Author/RL)

Notes that utility theory has enjoyed renewed interest among debate critics and other decision makers. Some of the problems with its application are identified and guidelines for debaters are suggested. (PD)

A modified beta binomial model is presented for use in analyzing random guessing multiple choice tests and taste tests. Detection probabilities for each item are distributed beta across the population subjects. Properties for the observable distribution of correct responses are derived. Two concepts of true score estimates are presented.…

Weber contends that the use of Rasch analysis, principal components analysis, and classical test analysis shows that an instrument designed to measure a "bilevel dimensionality" in probability achievement measures a single latent trait. That interpretation and the use of Rasch and classical analysis to establish unidimensionality are…

Outlines a model of decision making known to researchers in the field of behavioral decision theory (BDT) as subjective expected utility (SEU). The descriptive and predictive validity of the SEU model, probability and values assessment using SEU, and decision contexts are examined, and a 54-item reference list is provided. (JL)

Retrieval experiments with the Cranfield collection of 1,400 documents used strategies based on a probabilistic model for an initial search and intermediate search when no relevant documents were known. Results show initial strategy is better than conventional strategies in retrieval effectiveness and number of queries needed to retrieve…

Two studies investigated the possibility that assessment of confidence is biased by attempts to justify chosen answers. These attempts include selectively focusing on evidence supporting the chosen answer and disregarding contradictory evidence. Results suggest that confidence depends on the amount and strength of evidence supporting the answer…