This article reports the results of an experiment addressing extrapolation in function learning, in particular the issue of whether participants can extrapolate in a nonmonotonic manner. Existing models of function learning, including the extrapolation association model of function learning (EXAM; E. L. DeLosh, J. R. Busemeyer, & M. A. McDaniel,…

This article explicates the interaction between implicit and explicit processes in skill learning, in contrast to the tendency of researchers to study each type in isolation. It highlights various effects of the interaction on learning (including synergy effects). The authors argue for an integrated model of skill learning that takes into account…

The purpose of this paper is to introduce a new method for fitting item response theory models with the latent population distribution estimated from the data using splines. A spline-based density estimation system provides a flexible alternative to existing procedures that use a normal distribution, or a different functional form, for the…

This paper brings the intellectual tools of cognitive science to bear on resolving the ''paradox of the active user'' ["Interfacing Thought: Cognitive Aspects of Human--Computer Interaction," Cambridge, MIT Press, MA, USA]--the persistent use of inefficient procedures in interactive tasks by experienced or even expert users when demonstrably more…

This paper explains the principles and procedures of second-order theoretical analysis of observation data. The second-order theoretical procedure is illustrated by analysis of the student-teachers seminar on the subject of the Holocaust, focusing on dilemmas of Holocaust survivors. Analysing observational data allows two distinctive method of…

This paper proposes a multidimensional generalization of Coombs' (1964) parallelogram model for "pick any/'n'" data, which result from each of a number of subjects having selected a number of objects (s)he likes most from a prespecified set of "n" objects. In the model, persons and objects are represented in a low dimensional space defined by a…

Missing data analyses have received considerable recent attention in the methodological literature, and two "modern" methods, multiple imputation and maximum likelihood estimation, are recommended. The goals of this article are to (a) provide an overview of missing-data theory, maximum likelihood estimation, and multiple imputation; (b) conduct a…

Van de Pol and Langeheine (1990) presented a general framework for Markov modeling of repeatedly measured discrete data. We discuss analogical single indicator models for normally distributed responses. In contrast to discrete models, which have been studied extensively, analogical continuous response models have hardly been considered. These…

It is yet unknown whether individuals with and without savant abilities being affected by the same mental disorder display differences with regard to their intelligence profile. To examine this issue, we compared the test performance of 33 savant and 26 nonsavant autistic subjects using the Wechsler Intelligence Scales-Revised for children or…

This article suggests utilizing dialectical imagery, as understood by German social philosopher Walter Benjamin, as an additional qualitative data analysis strategy for research into the postmodern condition. The use of images mined from research data may offer epistemological transformative possibilities that will assist in the demystification of…

We rely a great deal on the schematic descriptions that represent experimental and quasi-experimental design arrangements, as well as the discussions of threats to validity associated with these, provided by Campbell and his associates: Stanley, Cook, and Shadish. Some of these designs include descriptions of treatments removed, removed and then…

Community colleges are truly an American invention that, despite many documented successes, remains controversial. There is a large body of research that criticizes these institutions citing non-successes (Dougherty, 1987, 1994; Brint & Karabel, 1989). Debates whirl not only about the overall outcomes of these institutions, but also about how to…

This paper describes the process for employing two principal instruments for relating the categories identifying the central phenomenon in grounded theory analysis. The Conditional Relationship Guide contextualizes the central phenomenon and relates structure with process. The second tool, the Reflective Coding Matrix, captures the higher level of…

We investigated the role of acetylcholine (ACh) during encoding and retrieval of tone/shock-induced fear conditioning with the aim of testing Hasselmo's cholinergic modulation model of encoding and retrieval using a task sensitive to hippocampal disruption. Lesions of the hippocampus impair acquisition and retention of contextual conditioning with…

This paper discusses the ethical issues associated with analysis of computer conference transcripts and the value of validating the interpretations of such transcripts with other data sources. Based on the study of a graduate level online course recently taught at a major American public university, this paper attempts to demonstrate how failures…