Bayesian methods for estimating dose response curves in quantal bioassay are studied. A linearized multi-stage model is assumed for the shape of the curves. A Gibbs sampling approach with data augmentation is employed to compute the Bayes estimates. In addition, estimation of the "relative additional risk" and the "risk specific…

This article outlines strategies for the inferring of English scientific terms by Spanish speakers. The article considers factors affecting the process of inference, the use of context morphology, and word origin in inferring word meaning. (SR)

A study investigated whether classroom reading instruction that focuses students' attention on story characters' motives and feelings improves their narrative comprehension. The subjects for this study were 48 third-grade students from 3 different classrooms in the same school. Two different treatments were used: the External Events (control)…

This paper describes a procedure for smoothing the proportions of a double-entry expectancy table which might be used in higher education admissions advising or other functions. The product of the smoothing procedure is a nomograph, a medium for displaying expectancies which provides pairs of individual values for two predictor variables rather…

Focusing on the process of reading comprehension, this book contains chapters on some central topics relevant to understanding the processes associated with comprehending text. The articles and their authors are as follows: (1) "Comprehension Processes: Introduction" (K. Rayner); (2) "The Role of Meaning in Word Recognition"…

One of the most valuable skills in group decision making is the ability to make trustworthy judgments about group performance. It follows from the "inferential model" of social cognition (Pavitt, 1989; Pavitt & Hight, 1986), that there are three types of judgments relevant to the group context: (1) behavioral (what the group did);…

Investigated were the role of mental imagery in children's logical reasoning and individual differences in children's use of imagery while reasoning. Fifth grade students assessed as being high imagers (HIS) and low imagers (LIS) completed conditional syllogisms of various kinds and were asked, after each of their responses, whether an image had…

Analogical reasoning and learning applied to the task of constructing qualitative explanations for physical phenomena are the subjects of this investigation. Two issues are addressed. The first is how analogies are elaborated to sanction new inferences about a novel situation. This issue is adddressed by contextual structure-mapping, a…

The relationship between cognitive psychologists and researchers in artificial intelligence carries substantial benefits for both. An ongoing investigation in causal reasoning in medical problem solving systems illustrates this interaction. This paper traces a dialectic of sorts in which three different types of causal resaoning for medical…

Thirty-eight sixth-grade students participated in a study that examined the relationship of conceptual tempo and performance on several study and reading activities. Results indicate that conceptual tempo may have a relationship to effective studying and reading. Methodology and results are discussed. (Author/JL)

Alphabet Math is an investigation of the order of usage of letters in the alphabet. Children collect individual data then compare and interpret it to make inferences. The inferences are compared to analyses of larger samples. How this is done is described. (MT)

The use of measures of magnitude of effect has been advocated as a way to go beyond statistical tests of significance and to identify effects of a practical size. They have been used in meta-analysis to combine results of different studies. Describes problems associated with measures of magnitude of effect (particularly study size) and…

Dealing with flexibility--or its converse, the extent of standardization--is fundamental to alignment, assessment design, and interpretation of results in fully inclusive assessment systems. Highly standardized tests make it easier to compare (performances, students, and schools) across time and to common standards because certain conditions are…

In the social sciences, evaluating the effectiveness of a program or intervention often leads researchers to draw causal inferences from observational research designs. Bias in estimated causal effects becomes an obvious problem in such settings. This paper presents the Heckman Model as an approach sometimes applied to observational data for the…

Several recent studies have investigated the application of statistical inference procedures to the analysis of differential item functioning (DIF) in test items that are scored on an ordinal scale. Mantel's extension of the Mantel-Haenszel test is a possible hypothesis-testing method for this purpose. The development of descriptive statistics for…