Changes in students' understanding of evolution resulting from different curricular and instructional strategies

This study assessed students' learning of evolution by natural selection within four different sections of an introductory biology course. Each section used a different combination of curricular materials (either traditional or historically rich materials) and instruction (either paired problem solving or traditional lecture). Students in the study completed pre- and postintervention evolution tests. Students' responses were analyzed to create variables for both correct and alternative conceptions of evolution. Pretest and posttest data were used to create difference scores that were compared both within and between teaching sections. Pre-to-post gains were expected in the correct (Darwinian Conception) scores, while pre-to-post losses were expected in the Alternative Conception scores. Also, students in the experimental sections were expected to perform better than those in the traditional sections. Pretest-to-posttest differences within each section showed gains in correct conceptions but few reductions in alternative conceptions. Comparisons between sections support the use of the paired problem-solving instructional strategy in conjunction with the historically rich curriculum. © 1996 John Wiley & Sons, Inc.     

Science content as an important consideration in science education research

Science education researchers have, with few exceptions, not used the conceptual content of science as an important variable in their research. Writings of two groups-philosophers of science, “are concerned with the influence of the conceptual knowledge shared by an intellectual community on the activities of that community and the psychologists are concerned with the influence of the conceptual knowledge held by an individual on that individual's behavior”, science, are concerned with the influence of the conceptual knowledge shared by an intellectual community on the activities of that community and the psychologists are concerned with the influence of the conceptual knowledge held by an individual on that individual's behavior. Suggestions are offered as to what kinds of science education research could be done in which the conceptual content of science is important.     

Dismantling the Reference Collection

In 2008, the University of Louisville’s (UofL) Ekstrom Library printed reference collection numbered almost 30,000 volumes. Copious collecting and sparse weeding built up the collection during the era before the Internet. There had been considerable reluctance to address its more outdated sections due to competing priorities and inertia. A change of leadership as well as the recognition of changing use patterns had lessened the need for such a large collection. In 2011, three librarians began a title-by-title review process that resulted in an 86% reduction of the reference collection by 2014. This article describes that process, summarizes the results, and discusses the benefits and disadvantages of this approach.     

Early to rise? The effect of daily start times on academic performance

Local school districts often stagger daily start times for their schools in order to reduce busing costs. This paper uses data on all middle school students in Wake County, NC from 1999 to 2006 to identify the causal effect of daily start times on academic performance. Using variation in start times within schools over time, the effect is a two percentile point gain in math test scores – roughly fourteen percent of the black–white test score gap. I find similar results for reading scores and using variation in start times across schools. The effect is stronger for students in the lower end of the distribution of test scores. I find evidence supporting increased sleep as a mechanism through which start times affect test scores. Later start times compare favorably on cost grounds to other education interventions which result in similar test score gains.     

The 5th annual SIETAR conference in Mexico city: An evaluation

The 5th Annual Conference of the Society for Intercultural Education, Training and Research (SIETAR), in Mexico City, was evaluated using both scaled and open-ended questions. Analysis of the scaled responses suggested that the participants found the conference to be personally enjoyable, professionally worthwhile, well organized and intellectually stimulating. Overall, the conference was rated very favorably. On the other hand, however, negative evaluations were received regarding the quality of the presentations, the travel agent, the translations and direct benefits in the areas of intercultural training and research. Demographic analyses indicated that North Americans, researchers and university and government people rated the conference most favorably. Seven recommendations for future conferences were derived from the summarized open-ended responses.     

Hemispheric specialization and the language abilities of autistic children

The purpose of the present study was to investigate the relationship between patterns of hemispheric specialization for speech processing and language ability in autistic children. 17 male autistic children, 6-18 years of age, and 17 normal children, matched for chronological age and gender, were tested. Measures of hemispheric asymmetry were differences in the averaged cortical evoked responses taken from right and left hemisphere scalp locations to linguistic and nonlinguistic auditory stimuli. A comprehensive battery of language tests was administered to autistic subjects. Autistic children's direction of hemispheric asymmetry in response to linguistic stimuli differed significantly from that of normal subjects. The majority of autistic subjects showed reversed (right hemisphere dominant), but not necessarily reduced, patterns of hemispheric asymmetry. Autistic children with more advanced language abilities were more likely to exhibit a normal direction of hemispheric asymmetry. The possibility that a shift from right to left hemisphere processing of speech occurs as the autistic child acquires spoken language is discussed.     

Transformation in higher education: a learner–needs segmentation leads to improved learner satisfaction

Segmentation is a marketing concept that can be applied in a post-secondary context. This article delineates the outcome of applying a learner–needs segmentation that resulted in significantly improved learner satisfaction scores in a professional faculty at a large public university. Our original work described the purpose and value of learner–needs segmentation to enable a better understanding of the undergraduates at a larger urban university. This article describes how a single faculty implemented a learner–needs segmentation to underpin curriculum redesign, program realignment and services to its students.