Repeated successive contrast in consummatory behavior with repeated shifts in sucrose concentration

Contrast in consummatory behavior was investigated following repeated shifts from 32% to 4% sucrose. In Experiment 1, contrast in licking and in open-field measures of activity occurred following the second and third downshifts. In Experiments 2a and 2b, equivalent contrast effects occurred following the first and second downshifts in sucrose. In Experiment 3, negative contrast remained unabated following nine downshifts in animals shifted between 32% and 4% sucrose on alternate days. Similar results were found for five downshifts in animals shifted every 2 days. In both of these latter conditions, positive contrast occurred over the first few shifts and was then lost as the 32% control group reached asymptote. These data show that repeated negative contrast effects in consummatory behavior are robust and enduring and occur under several different sets of experimental parameters. The results are discussed in terms of reinforcement level and emotional interpretations of contrast effects, and the possibility was suggested that the causal mechanism of contrast changes with repeated shifts.     

Telling Their Side of the Story: African-American Students' Perceptions of Culturally Relevant Teaching

An increasing amount of scholarship has documented the salience of culturally relevant teaching practices for ethnically and linguistically diverse students. However, research examining these students' perceptions and interpretations of these learning environments has been minimal at best. In this article, the author details the findings from a study that sought to assess African-American elementary students' interpretations of culturally relevant teachers within urban contexts. Student responses indicated that culturally relevant teaching strategies had a positive affect on student effort and engagement in class content and were consistent with the theoretical principles of culturally relevant pedagogy. The qualitative data revealed three key findings that students preferred in their learning environments (1) teachers who displayed caring bonds and attitudes toward them, (2) teachers who established community- and family-type classroom environments, and (3) teachers who made learning an entertaining and fun process.     

On the Relative Value of Multiple-Choice, Constructed Response, and Examinee-Selected Items on Two Achievement Tests

Using analyses based on fitting item response models to data from the College Board's Advanced Placement exams in chemistry and United States history, we found that the constructed response portion of the tests yielded little information over and above that provided by the multiple-choice sections. These tests also allow examinees to select subsets of the constructed response items; we found that scoring on the basis of the selections themselves provided almost as much information as did scoring on the basis of the answers     

Perspectives on the future of educational technology

This study was conducted to determine the opinions of a broad-based sample of educational technology professionals and students about the future of our field. A nationwide sample of 268 university personnel (faculty members, doctoral students, and master's students) and trainers completed a Likert-type survey that contained 30 items covering six topic areas: Educational Technology and Learning Theory, Instructional Design Models, Technology and Individualized Instruction, Advances in Technology, Educational Technology and Schools, and Employment and Job Opportunities. The overall results reveal that educational technologists have a positive outlook toward the future of our field. Opinions were most positive in the areas of Educational Technology and Learning Theory, Employment and Job Opportunities, and Technology and Individualized Instruction, and were least positive in the area of Advances in Technology. There were numerous significant differences of opinion on individual items across the four respondent groups, with the greatest number of differences occurring between faculty members and master's students.     

The triarchic theory of intelligence and computer-based inquiry learning

Sternberg's (1985) triarchic theory of human intelligence distinguished among three types of intellectual abilities: analytic, creative, and practical. Our study explored the relationships between student abilities and the cognitive and attitudinal outcomes that resulted from student immersion in a computer-based inquiry environment. In particular, we examined outcome variables related to content understanding, problem solving, and science-related attitudes. Results indicated that more practical abilities predicted greater content understanding and transfer of problem-solving skills. High analytic abilities were predictive of content understanding but not transfer of problem-solving skills. High creative abilities predicted problem solving, but were not predictive of performance on content understanding. In terms of science-related attitudes, students who were dominant in practical abilities had significantly more positive posttest attitudes than those dominant in analytic abilities. The results from this study were used to make recommendations regarding design principles used in the subsequent development of computer-based inquiry environments.     

Creativity through self-directed learning: three distinct dimensions of teacher support

ABSTRACT

Self-directed learning and creativity are critical workplace competences that are important to foster in formal educational settings. Previous studies have identified a relationship between self-directed learning and creativity, but the specific nature of this relationship is unclear. The purpose of the present theoretical paper is to examine through a literature review the possibility that creative learning outcomes can be supported through a self-directed learning process. The importance of considering self-directed learning in the context of adult learning – as a pragmatic learning process – is outlined. A conclusion is drawn that (1) creative learning outcomes are potentially supported through self-directed learning, and (2) in the process, teachers can provide support to learners in three distinct different ways. A variety of pragmatic educational activities that may enable self-directed learning and creative learning outcomes are discussed, including experiential learning; workplace simulations; and problem-, case-, and (e-) portfolio-based learning. In these activities, teacher support seems advantageous for many learners. The three distinct dimensions of teacher support identified in the present paper are important to consider in further empirical studies on self-directed learning.     

Self-presentation bias in surveys of teachers’ educational technology practices

This study investigated self-presentation bias in the self-reports of teachers about their practices in six topic areas in educational technology (Instructional Design, Assessment, Learner-Centered Instruction, Curriculum Alignment, Attitudes about Computers, and Use of Computers with Students). Subjects were 50 middle-school teachers. Data were collected using a 30-item Likert-type survey containing five items per topic area. Teachers responded to items in two forms: “what I do” and “what other teachers do.” Significant differences favoring the “I” form were obtained in three of the six areas (Instructional Design, Learner-Centered Instruction, and Curriculum Alignment) and on nine of the 30 items, indicating a rather strong self-presentation bias. Responses were generally positive across both forms. Results are discussed with implications for working with teachers and for using additional assessment measures that complement teacher self-reports.     

How Much Do the Effects of Education and Training Programs Vary Across Sites? Evidence From Past Multisite Randomized Trials

Multisite trials, in which individuals are randomly assigned to alternative treatment arms within sites, offer an excellent opportunity to estimate the cross-site average effect of treatment assignment (intent to treat or ITT) and the amount by which this impact varies across sites. Although both of these statistics are substantively and methodologically important, only the first has been well studied. To help fill this information gap, we estimate the cross-site standard deviation of ITT effects for a broad range of education and workforce development interventions using data from 16 large multisite randomized controlled trials. We use these findings to explore hypotheses about factors that predict the magnitude of cross-site impact variation, and we consider the implications of this variation for the statistical precision of multisite trials.     

Perspectives on educational technology research and development

This is the introductory article for the first issue ofEducational Technology Research and Development (ETR&D). The authors review the issues and process that led to the decision by the AECT Executive Board to co-publishEducational Communication and Technology Journal (ECTJ) and theJournal of Instructional Development (JID) in a new journal. The results of analyses of ECTJ and JID by Schwen and Middendorf (1987) and Dick and Dick (1989) are briefly summarized. The authors then report their own survey of AECT members to determine the topics and types of articles the members would prefer to read in ETR&D. Member preferences are compared with the actual content of the last ten issues of ECTJ and JID. Finally, the authors briefly discuss their own perspectives on ETR&D.