Imprinting in older ducklings: Some tests of a reinforcement model

Ducklings (Anas Platyrhynchos domesticus) older than the so-called critical period (Days 1 and 2 posthatch) were exposed to an imprinting stimulus after various experimental histories. The first study found that in previously isolated 10-day-old subjects the stimulus exhibited the same capacity to reinforce an operant response and to generate a burst-like pattern of responding as in ducklings imprinted to it on Day 1. In Experiment 2, an imprinting stimulas exhibited reinforcing capacities in 5 to 10-day-old ducklings that had previously been imprinted to a different stimulus. Most of these ducklings came to prefer the second imprinting stimulus over the first. Experiment 3 revealed that in 5-day-old ducklings with a prior history of imprinting to a different stimulus, the otherwise neutral features of a new imprinting stimulus acquired the same kind of persistent control over distress vocalization that they acquire in younger, naive subjects. In all these studies, the only difference between imprinting in older vs. younger subjects was that in older subjects a novel imprinting stimulus initially evoked fear reactions rather than filial behavior. These findings contradict the traditional view of imprinting as an irreversible process that occurs only during a brief critical period, but are entirely consistent with a reinforcement model of imprinting.     

Differentiation and its Problems: the views of primary teachers and curriculum support staff in Northern Ireland

This paper identifies a range of problems associated with putting differentiation into practice. The opinions of head teachers, subject co‐ordinators, and teachers were sought, as well as those of the curriculum support staff in the Education and Library Boards on the extent to which these problems affected primary schools in Northern Ireland, and case‐studies illuminated these views. The results showed that the curriculum support staff regarded most problems in differentiation in a more serious light than the schools themselves did, but there was agreement on the acute lack of time to deliver a differentiated curriculum, on the shortage of human resources and on the difficulties with new assessment methods.     

‘Reflective co-education’ or male-oriented physical education? Teachers' views about activities in co-educational PE classes at German secondary schools

As much as the principle of co-education may appear to make sense in physical education (PE) lessons, trends in its development have emerged over the past years, especially in secondary schools, which were certainly not intended by the pedagogical programme of ‘reflective co-education’, which stands for respect for equality and difference in co-educational PE classes. Although this programme has been anchored in the curricula of various federal states in Germany for around 15 years, the prevailing practice even today, and documented in many empirical studies, is that so-called ‘male-oriented’ activities (e.g. games) predominate in PE classes while ‘female-oriented’ activities (e.g. dance, aerobics, gymnastics or health-related exercises) are scarcely ever taught. The purpose of this contribution is to examine (1) the extent to which male (as well as female) PE teachers actually make such a one-sided selection of activities; (2) the reasons they give for this practice and the way they perceive and judge it; and (3) how they communicate this selection to each other and to their pupils. Seventy-one PE teachers (of both sexes) were asked about these questions in problem-centred interviews. The main result of the study is that both male and female PE teachers almost exclusively do ‘male-oriented’ activities (like games and other competitive activities) in mixed-gender classes, although they give different reasons for doing so. By contrast, so-called ‘female activities’ are avoided. The observable implications are that PE lessons have increasingly become dominated by male patterns of physical activity and that a hierarchy is constructed between so-called ‘male activities’ and ‘female activities’ in PE. As a result, a key objective of ‘reflective co-education’ has not been achieved. Female PE teachers suffer considerably under these conditions. It can be observed that many of them are either planning to reduce their hours in, or even give up, teaching PE (or have already done so).     

Preparing preservice teachers to use computers effectively in elementary schools

Abstract

Computers and computer software have become integral components of the elementary school curriculum. Classroom teachers often express concern about the inadequate training they receive in the use of technology in the classroom. To meet the needs of future teachers, three university professors added issues related to using technology with young children to existing courses for elementary education majors. In addition, they introduced criteria for evaluating software and gave students opportunities to select software for instruction. After completing the courses, students were more comfortable with using computers, felt more competent about reviewing software, and were more aware of the issues related to using technology for instruction.     

The Role of Practicality in the Choice of Instructor Rating Methods

Behavioral Expectation Scales (BES) were compared to summated and trait-oriented scales as measures of teaching performance. The scales were developed in a college setting; the ratees were college professors and their raters were college students. Both the psychometric properties and the practicality criterion were examined. Overall, the psychometric evidence suggests that the summated format is slightly superior. When the issue of practicality is examined in terms of the raters’ perceptions of which method is easiest, most difficult, most defensible, and most accurate, the summated scale is definitely superior. Surprisingly, even the students who participated in the development of the BES format preferred the summated form. Given the inconclusive psychometric evidence reported in the literature, and until better tests are formulated, it appears that the deciding factor will ultimately depend on what we believe is the neglected criterion of practicality.