Textbook treatments and students' understanding of acceleration

A single science textbook often provides the syllabus for courses at upper secondary and tertiary levels, and may be used as a principal source of information or explanation. The research reported in this article challenges such practices. The ways in which the concept, acceleration, is treated in physics textbooks is compared with understandings of the concept demonstrated by final-year secondary (Year 12) and first-year university students. Some students' understandings are shown to be incomplete in ways that parallel misleading or inaccurate textbook treatments of the concept. In addition to misleading or inaccurate statements, the limitations of some textbook treatments of acceleration were found to include: lack of attempts to make explicit relationships with other concepts, failure to point out when it is appropriate to use particular definitions or that an alternative definition might be more appropriate in specific situations, inclusion of operational definitions without conceptual explanations, and a focus on quantitative treatments while overlooking the development of qualitative understanding. Two principal aspects that distinguished the ways in which the students understood acceleration were identified: (a) the relation between acceleration and velocity; and (b) the relation between acceleration and force(s). The results of the study have implications for teaching and, in particular, for the use of textbooks in teaching. These implications are discussed in the article.     

The Pictorial Scale of Perceived Competence and Social Acceptance: Does It Work with Low-Income Urban Children?

The present study represents a twofold investigation wherein ( a ) the construct validity of the Pictorial Scale of Perceived Competence and Social Acceptance for Young Children (PSPCSA) and ( b ) the developmental appropriateness of the PSPCSA were empirically examined for urban Head Start children. Data were collected from a sample of 476 African-American children (48–64 months) representing children enrolled in a large metropolitan Head Start program. In the first study, neither replication of the test author's statistical procedures nor a series of exploratory factor analyses produced psychologically meaningful constructs. A second study tested the assumption that the PSPCSA administration format is developmentally appropriate for preschool children. Results from this study did not support the assumption that the PSPCSA is developmentally appropriate for preschool children. Implications for establishing valid assessment methods for urban Head Start children were discussed.     

George Walker and the ghost: the chess-player in urban and literary culture, 1840–51

This article aims to contextualise the nineteenth-century chess-player and writer George Walker’s involvement within urban and literary culture. Continuing research published in two recent Sport in History articles concerning Walker’s essays on the chess-player in Victorian Paris, this article considers another side to the chess-player’s cultural image in a different urban setting within Walker’s historical-fiction ‘A Night in York – A Chess Adventure of 1842’, in which the author imagines a night-time meeting with a ghostly medieval chess-player. George Walker’s life was marked by an involvement within the sites of nineteenth-century literary and urban chess-play. One notable feature of Walker’s writing was his constant return to the history of the game and its influence on the present day. Indeed, the interplay between chess past and chess present has been seen as a problematic aspect of his literary output. This article considers this theme and contends that Walker’s regard for the past should be seen within the context of modernity and an attempt to recover and pay sufficient attention to the historic game before its traces and fragments disappeared forever, while acknowledging the futility of the effort.     

Conditioned defensive burying in rats free to escape

Rats shocked once by a stationary, wire-wrapped prod bury it if suitable materials are available. Does this conditioned defensive burying occur when rats have the opportunity to flee from the source of aversive stimulation, or is it limited to situations such as those in which it had previously been studied—those in which the relatively small test chamber confined each rat to the immediate vicinity of the prod? In the present experiments, the capacity of rats to flee from the shock prod was enhanced by increasing the floor dimensions of the test chamber up to 200X80 cm (Experiment 1) or by providing the rats with an opportunity to seek refuge in a separate, safe compartment (Experiment 2). Although both of these modifications to the usual conditioned-defensive-burying paradigm significantly reduced the duration of burying and the height of the accumulated mounds, burying remained well above control levels in all experimental conditions.     

Motivation for physical activity in young people: entity and incremental beliefs about athletic ability

Three studies are reported of children and youth aged 11–19 years (n?=?3478) examining the nature of beliefs about athletic ability. Drawing on related research in academic, moral and stereotyping domains, development of a psychometric instrument assessing athletic ability beliefs is detailed. Support was found for a multidimensional hierarchical structure that is invariant across age and gender. Confirmatory factor analysis revealed a structure comprising two higher-order factors of entity and incremental beliefs underpinned by beliefs that athletic ability is stable and a gift (entity), and is open to improvement and can be developed through learning (incremental). Incremental beliefs, indirectly through a task goal orientation, and entity beliefs directly, predicted self-reported amotivation towards physical education and sport. On the other hand, enjoyment of physical activity in youth was predicted directly by task orientation and incremental beliefs. Predictions concerning the moderating role of perceived competence were not supported. Our findings highlight the importance of ability beliefs and goals in understanding the determinants of physical activity in children and youth.     

The Mediating Effects of Student Engagement on the Relationships Between Academic Disciplines and Learning Outcomes: An Extension of Holland’s Theory

This research examined the relationships among students?? academic majors, levels of engagement, and learning outcomes within the context of Holland??s person?Cenvironment theory of vocational and educational behavior. The study focused on the role of student engagement as a mediating agent in the relationships between academic majors and student learning. Drawing on data from a stratified random sample of 20,000 seniors who participated in the 2008 National Survey of Student Engagement, results revealed that students?? academic majors were significantly related to levels of engagement and learning outcomes. Student engagement was also significantly related to learning outcomes. Students?? academic majors generally were not indirectly related to learning outcomes through levels of engagement. An important exception to this result was found for students in Enterprising environments where indirect relationships among Enterprising disciplines and Enterprising learning outcomes were positive, statistically significant, and substantially larger than the direct relationship.     

Motives,attitudes and approaches to studying in distance education

This study investigated the relationships between demographic characteristics, motives and attitudes to studying, self-reported study behaviour and measures of outcome. Students taking courses by distance learning received a postal survey containing a short form of the Motivated Strategies and Learning Questionnaire (MSLQ) and the Revised Approaches to Studying Inventory (RASI). Path analysis was used to assess the causal relationships among 395 students’ age, gender and prior qualifications, their scores on the MSLQ and the RASI and their marks. Evidence was obtained for the causal efficacy of most of the paths among the main components. In particular, the causal link between variations in students’ motives and attitudes and variations in their study behaviour is bidirectional.     

One-trial context fear conditioning with immediate shock: The roles of transport and contextual cues

In three experiments, using a total of 120 albino rats, we assessed whether transportation cues might evoke some of the freezing (i.e., defensive immobility) that we see in a context on a day following a footshock given immediately after placement in that context. The results suggested that immediate shock could directly condition strong fear to both simulated and actual transport cues. Although conditioning to transport cues explains some of the freezing that is seen on the test day, it does not explain all of it. We also found evidence that some of the freezing is due to conditioning to permanent features of the context in which the immediate shock is given. The results support a role for transport cues in theories of context conditioning and argue against shock-processing accounts of the conditioning deficit that results from immediate shock.     

The outcomes of three models of counselling and consulting

This empirical investigation evaluated the outcomes of three models of counselling with students in the elementary school who were identified as having Learning and behavioral problems. It was hypothesized that model one, counselling with parents, teachers and students was the most effective: model two, counselling with teachers and parents was the next most effective and model three, coun selling with students only was the least effective. It was discovered after 5 months of counselling, that although the student reading scores of the combined counselling groups improved significantly in comparison to the control group, no statistically significant change occurred between the counselling models either on student reading or classroom behavior. Model one counselling, however, produced cooperative relationships between teachers, parents and students.The University of British Columbia