A lognormal model for the response times of a person on a set of test items is investigated. The model has a parameter structure analogous to the two-parameter logistic response models in item response theory, with a parameter for the speed of each person as well as parameters for the time intensity and discriminating power of each item. It is…

Objective: To examine in children the influence of maltreatment and associated psychiatric sequelae on behavioral responses to reward stimuli. Method: A computerized two-choice decision-making task involving probabilistic monetary gains was used to probe elemental processes of goal-directed actions. Using different risk contingencies, the authors…

The present study examined children's cognitive engagement with television as a function of the continuity of central or incidental content and whether this varied with age and clinical status. In Experiment 1, 9- to 11-year-old children's response times on a secondary task were slower the later a probe occurred in a sequence of central events,…

Although there are marked individual differences in the effect of aging on learning and performing motor skills, there is agreement that humans process information less efficiently with advanced age. Significant decrements have been found specifically with motor tasks that are characterized as externally-paced, rapid, complex, and requiring rapid…

Four papers from the University of California at San Diego (UCSD) Project on Human-Computer Interfaces are presented in this report. "Evaluation and Analysis of User's Activity Organization," by Liam Bannon, Allen Cypher, Steven Greenspan, and Melissa Monty, analyzes the activities performed by users of computer systems, develops a…

The Inductive Reasoning and Analytical Reasoning tests of the Johnson O'Connor Research Foundation have been analyzed in a factorial study including marker tests for two commonly recognized reasoning factors, induction (three tests) and logical reasoning (two tests). The primary purpose of the study was to determine the extent to which the Johnson…

Three experiments were conducted to investigate whether the results of previous research on rhymes detection were due to a rhyme production frequency bias (in favor of similar rhymes) in the materials used. The previous results had indicated that orthographically similar rhymes were detected more rapidly than dissimilar rhymes. In the three…

A critical look at two typical research designs is presented, the first study being an investigation of field dependence and reaction time in senior tennis players, and the second being an investigation of the concepts of locus of control and achievement motivation in highly successful male competitive tennis players age 65 and older. A critique…

Cognitive development and various educational implications are discussed in terms of Donald Saari's model of the interaction of a learner and the enviroment and the constraints imposed by the inefficiency of the learner's cognitive system. Saari proposed a hierarchical system of cognitive structures such that the relationships between structures…

Forty three-option multiple choice (MC) statements on a midterm examination were converted to 120 true-false (TF) statements, identical in content. Test forms (MC and TF) were randomly administered to 50 undergraduates, to investigate the validity and internal consistency reliability of the two forms. A Kuder-Richardson formula 20 reliability was…

About 25 children in each of grades 3, 5, 7, 9, and 11 were tested in their ability to solve linear syllogisms, such as: John is taller than Mary. Mary is taller than Pete. Who is tallest--John, Mary, or Pete? Response latencies and error rates decreased across grade levels and sessions. Component latencies also generally decreased with increasing…

This study investigates the hypothesis that reflective children have a tendency for detailed analysis of information whereas impulsive children process information more globally, and that differences in strategies of visual information processing of these two conceptual style groups lead to superior performance of reflective children insofar as…

This paper describes a methodological approach to the reading processes, involving the use of measures of speed of response or reaction time (RT) obtained from subjects while performing reading related tasks. Following a review of the literature on measures of RT, two experiments currently being done at the University of Minnesota are described…

It was hypothesized that, with stimulus words selected for familiarity and associative hierarchy, extreme responders give faster and more common or popular free associations than nonextreme responders. Results did not support this hypothesis. Predicted effects of stimulus word attributes were observed. (Author)

This paper briefly reviews how subjects enhance performance by favoring some stimuli over others. The author calls the mechanism by which this is achieved "expectancy", a generic term including preparatory set, behavioral hypotheses, orienting reflex, and anticipatory goal responses. Temporal and event expectancy are contrasted. Verbal prediction…