Investigatory behavior inthe plains garter snake (Thamnophis radix) and several additional species

Garter snakes (Thamnophis radix), hognose snakes (Heterodon platyrhinos), and rattlesnakes (Crotalus species) flick their tongues and crawl about in an open field containing no food or sexual (i.e., reproductive) odors. As Experiment I shows, the taxa differ reliably in both rate of tongue flicking and rate of locomotion. In Experiment II, garter snakes (Thamnophis radix) placed into an open field for 5 min showed more tongue flicking than snakes that were handled and placed directly back into their home cages, indicating that the first group was exploring the apparatus rather than responding only to handling. During Minutes 3 through 5 (Experiment III) in the open field, garter snakes emitted fewer tongue flicks than they did during the first minute, and after 20 min, the rate of tongue flicking was virtually zero. However, snakes were capable of responding to presentation of new objects and/or odors, indicating that the previous response decrement was not derived from effector fatigue but rather from some habituatory process. Experiment IV revealed that satiated snakes habituated more rapidly than hungry snakes during exploration of the open field. Hence, exploratory behavior in these snakes is at least partially under the control of the same factors which mediate food-related appetitive activities.     

Effect of Selected Doses of Alcohol on Fatigue Parameters of the Forearm Flexor Muscles

Abstract

The purpose of the present study was to enhance knowledge of the effect of alcohol on physical performance by analyzing the effect of a small and moderate dose of alcohol on several aspects of muscular strength and endurance; in addition to the standard dosages, a large dose was given to an experimental subgroup. The parameters studied included initial strength, maximal strength, steady state or final strength, total work, fatigable work and the rate of fatigue of the forearm flexors. Male university students (N = 35) served as subjects and underwent three trials of a standardized work task consisting of intermittent maximum contractions of the forearm flexors performed at the rate of 30/min. for 6 min. Prior to each trial, each subject consumed either a control, small, or moderate dose of alcohol. The statistical analysis indicated that a small or moderate dose of alcohol had no effect on five of the parameters under investigation. The mathematical analysis of the rate of fatigue indicated rather large differences between the main rate constants, but the findings must be interpreted cautiously due to the insignificant nature of the statistical analysis. It was concluded that a small or moderate amount of alcohol had no effect on the strength and endurance variables under investigation.     

Evaluation of Video-Based Instructional Coaching for Middle School Teachers: Evidence from a Multiple Baseline Study

Thomas M. SkrticDepartment of Special Education, University of Kansas, Lawrence, Kansas, USABarbara A. BradleyDepartment of Curriculum and Teaching, University of Kansas, Lawrence, Kansas, USAJim KnightCenter for Research on Learning, University of Kansas, Lawrence, Kansas, USA We designed a multiple baseline study to evaluate an instructional coaching model in which coaches use video recordings of collaborating teachers’ classrooms to inform their coaching practices. In this model, teachers and coaches use video evidence to co-construct a student-based goal and identify best practices to reach their goal. We found that the instructional coaching model is associated with greater use of effective pedagogical strategies among teachers and increased student engagement in the classroom.     

Longitudinal development of educational theory: democracy and the classroom

The problem of making education policy documents more explicit is addressed in this paper. As a vehicle for discussion the paper examines a contemporary policy that has major shortcomings in the explicitness of its language: Australia's ‘Participation and Equity Program’, a policy directed at increasing access to education by post‐compulsory level students. Problems in making policies explicit are discussed. Policies are seen as complex messages whose meanings routinely become scrambled for implementers remote from the language community of policy framers. The paper suggests the use of a sociology of policy language in education to assist in policy design and dissemination. Its concluding sections recommend the kinds of applied work that might be undertaken to improve the explicitness of policy language generally.     

Some effects of the award algorithm on honours degree classifications in UK higher education

In earlier work the Student Assessment and Classification Working Group (SACWG) found that up to 15% of honours classifications in UK higher education might be different if the results had been fed through another institution's award algorithm. In this article a more sensitive analysis has been applied to two blocks of institutional results that have been treated to reflect two variations that can be found in the range of honours degree award algorithms in use in UK higher education: (a) the relative weighting of performances in the second and third (or final) year of full‐time study; and (b) the number of results that can be ‘dropped’ in determining the degree classification. The analyses indicate that a student's honours degree classification may be affected by the way in which a degree classification is computed. Dropping the ‘worst’ 30 credit points from the normal 240 of the final two years of study might raise one classification in six, and (separately) changing the weightings of Year 2:Year 3 results from 50:50 to 25:75 might change one in ten, the majority of changes being upwards.     

A Model of Maternal and Paternal Ethnic Socialization of Mexican‐American Adolescents’ Self‐Views

Data from a sample of 462 Mexican‐American adolescents (M = 10.4 years, SD = .55; 48.1% girls), mothers, and fathers were used to test an ethnic socialization model of ethnic identity and self‐efficacy that also considered mainstream parenting styles (e.g., authoritative parenting). Findings supported the ethnic socialization model: parents’ endorsement of Mexican‐American values were associated with ethnic socialization at fifth grade and seventh grade; maternal ethnic socialization at fifth grade and paternal ethnic socialization at seventh grade were associated with adolescents’ ethnic identity exploration at 10th grade and, in turn, self‐efficacy at 12th grade. The findings support ethnic socialization conceptions of how self‐views of ethnicity develop from childhood across adolescence in Mexican‐American children.     

Wikipedia and the University,a case study

This article discusses the use of Wikipedia by academics and students for learning and teaching activities at Liverpool Hope University. Hope has distinctive aspects but we consider the findings to be indicative of Wikipedia use at other British universities. First we discuss general issues of Wikipedia use within the university. Second, we examine existing research on Wikipedia use amongst students and academics. Based upon a sample of 133 academics and 1222 students, our principal findings were: (1) 75% of academics and students use Wikipedia; (2) student use is typically confined to the initial stages of assessments; (3) a quarter of academics provide guidance on how to use Wikipedia and (4) 70% of academics use Wikipedia for background information for teaching purposes, something that it is not influenced by whether student use is tolerated or not. Our conclusion is that whilst Wikipedia is now unofficially integrated into universities, it is not ‘the’ information resource as feared by many and that an enlightened minority of academics have attempted to assimilate it into their teaching.     

Socialization and Family Correlates of Mental Health Outcomes among Hispanic and Anglo American Children: Consideration of Cross-Ethnic Scalar Equivalence

Recently there has been concern over the need for developmental research within ethnic minority populations and interest in socialization and family variables within, and variability across, ethnic groups. This study reports analyses designed to: compare several socialization, family, and mental health variables among Hispanic and Anglo American 8–14-year-old children and mothers; examine the regression equations predicting mental health indicators with the socialization and family variables; and evaluate the cross-ethnic scalar equivalence of these socialization and family measures. The findings indicate that there are ethnic differences in several socialization and family variables; several of the socialization and family variables are related to the mental health variables, and these relations are very similar across ethnic groups; and the socialization and family measures appear to have sufficient cross-ethnic scalar equivalence for English-speaking, largely Mexican American Hispanic samples. Further, these findings suggest some caution regarding the use of the Child Depression Inventory in Hispanic samples.