Symbolic,identity, and probe delayed matching of sounds by the bottlenosed dolphin

The short-term memory for sounds of the bottlenosed dolphin was tested using symbolic, identity, and probe forms of the delayed matching-to-sample (DMS) task. The forms differed in the number (one or two) or nature (symbolic or identity matches of sample sounds) of postdelay test stimuli available as memory retrieval cues. Although symbolic DMS was difficult to learn, the final performance level was approximately equal to that for identity or probe DMS. On all tasks, the dolphin’s responses were above 80% correct through to delays of 90 sec and, in some cases, through to delays of 180 and 240 sec, the “limits” being governed mainly by the dolphin’s reluctance to continue being tested at long delays. Encoding of sample stimuli into their learned symbolic representation was hypothesized to have reduced symbolic DMS to a recognition memory task, resulting in the observed equivalence of performance with the other two recognition memory tasks. The probe DMS results, unlike those for identity or symbolic DMS, showed no significant proactive interference effects from samples of prior trials. Instead, proactive interference was traceable to the probe value of the prior trial. Overall, the auditory DMS data for the dolphin were functionally similar to results reported for monkeys tested on symbolic, identity, and probe visual DMS tasks.     

College chemistry and piaget: The relationship of aptitude and achievement measures

Cognitive performance on “An Inventory of Piaget's Developmental Tasks” (IPDT) was related to the Scholastic Aptitude Tests and performance in both college chemistry lecture and laboratory classes. The IPDT is a valid and reliable 72-item, untimed, multiple-choice paper-and-pencil inventory. It has 18 subtests grouped into five problem areas representing different Piagetian tasks. Subjects (n = 225) from two different levels of introductory chemistry courses participated. IPDT scores were significantly correlated with SAT and placement data. In overall Piagetian development, “A” students rated higher than others. Performance in classification and proportional reasoning problem areas correlated with course achievement, particularly for higher-level students. Weakest areas of development were indicated by subtest scores and are described with implications for course performance. Finally, Piagetian tasks were related to learning and instructional activities in introductory chemistry classes and are discussed.     

Merit: A debate

Louis Settembrini is the pseudonym of a former chairman of one of the social science departments at the University of Rochester.     

The CoVis Project: Building a Large-Scale Science Education Testbed*

This paper describes the construction and research program of the Learning Through Collaborative Visualization (CoVis) Project, a testbed for exploring science education reform with telecommunications technology. The CoVis testbed is contrasted with other forms of educational research in an “ecology of paradigms,” which argues that testbeds are in fact a new setting for research with different requirements and challenges for the researcher. Two extended examples of telecommunications research are provided as examples of the kind of research that testbeds are well suited to explore. The first example is the evolution of videoconferencing in the CoVis testbed. The second example is the design and development of a networked groupware application called the Collaboratory Notebook.     

Reports on Computer Assisted Instruction in Israel

This project is a modular CAI system intended to produce better learning in elempntary mathematics, seeking real solutions to real problems. The central computer hottses a model of knowledge which is the changeable component of the structure. After the initial experience with mathematics a reading comprehension course and an ‘English as a second language’ course will be prepared. The system includes pedagogic strategies as a teacher model.     

The effectiveness of simulated robots for supporting the learning of introductory programming: a multi-case case study

This work investigates the effectiveness of simulated robots as tools to support the learning of programming. After the completion of a systematic review and exploratory research, a multi-case case study was undertaken. A simulator, named Kebot, was developed and used to run four 10-hour programming workshops. Twenty-three student participants (aged 16–18) in addition to 23 pre-service, and 3 in-service, teachers took part. The effectiveness of this intervention was determined by considering opinions, attitudes, and motivation as well as by analysing students’ programming performance. Pre- and post-questionnaires, in- and post-workshop exercises, and interviews were used. Participants enjoyed learning using the simulator and believed the approach to be valuable and engaging. The performance of students indicates that the simulator aids learning as most completed tasks to a satisfactory standard. Evidence suggests robot simulators can offer an effective means of introducing programming. Recommendations to support the development of other simulators are provided.     

Managing Reform: Lessons from Urban High Schools

ABSTRACT

American high schools present an extremely difficult, nearly intractable setting for serious educational reform efforts. Yet such efforts can succeed. This article reports results from a survey of 179 urban comprehensive high schools that were successfully implementing change programs based on effective schools principles.

All schools encountered problems of implementation. Larger‐scale, instructionally‐oriented, and longer‐lasting programs induced more problems. Problems were only moderated, not eliminated, by good‐quality planning.

Given the problem‐richness of change efforts, the major determinant of successful implementation was good problem‐coping. It was made more likely by the presence of consensus (shared vision), support of key stakeholders in and out of the school, planning quality, external assistance, and administrative time spent. Case studies showed that the presence of an empowered change management group aided all these critical factors.

Schools with the most impact (defined as student outcomes, teacher improvement, and organizational improvement) had focused on teacher or organizational changes to begin with, coped with the inevitable problems well, had internal and external constituencies supporting the change effort, and sustained the work for a longer period of time (typically 4‐5 years).

The key variables appear to form a coherent causal network. Implications for change management are drawn.