The primary purpose of the present study was to assess the ontogeny of nonassociative learning and memory in 16-, 30-, and 75-day-old rats. In each of three experiments, habituation of the orienting response to a novel auditory stimulus was measured. The orienting response is an unconditioned reaction elicited by innocuous environmental stimulation that habituates with repeated stimulus presentations. Both an autonomic component (heart-rate deceleration) and a behavioral index (head jerk) of the orienting response were recorded in this study. Although no age differences in rate of habituation (i.e., rate of nonassociative learning) were found (see Experiment 1), a marked effect of age on retention of habituation was observed. Preweanling rats retained habituation of the orienting response to an auditory stimulus for less than 4 h (Experiment 2), whereas adult animals exhibited no forgetting even after a 1-week interval (Experiment 3). These results are discussed in terms of (1) demonstrations of age-related differences in associative memory, (2) the persistence of nonassociative memories in adults, and (3) the significance of the orienting response as a measure of retention of nonassociative learning. 相似文献
OBJECTIVE: A cross-sectional study of gender specific relationships between self-reported child sexual abuse and suicidality in a community sample of adolescents. METHOD: Students aged 14 years on average (N = 2,485) from 27 schools in South Australia completed a questionnaire including items on sexual abuse and suicidality, and measures of depression (Centre for Epidemiological Studies Depression Scale), hopelessness (Beck Hopelessness Scale), and family functioning (McMaster Family Assessment Device General Functioning Subscale). Data analysis included logistic regression. RESULTS: In boys, self-report sexual abuse is strongly and independently associated with suicidal thoughts, plans, threats, deliberate self-injury, and suicide attempts, after controlling for current levels of depression, hopelessness, and family dysfunction. In girls, the relationship between sexual abuse and suicidality is mediated fully by depression, hopelessness, and family dysfunction. Girls who report current high distress about sexual abuse, however, have a threefold increased risk of suicidal thoughts and plans, compared to non-abused girls. Boys who report current high distress about sexual abuse have 10-fold increased risk for suicidal plans and threats, and 15-fold increased risk for suicide attempts, compared to non-abused boys. Fifty-five percent (n = 15) of sexually abused boys attempted suicide versus 29% (n = 17) girls. CONCLUSIONS: A history of sexual abuse should alert clinicians, professionals and carers in contact with adolescents, to greatly increased risks of suicidal behavior and attempts in boys, even in the absence of depression and hopelessness. Distress following sexual abuse, along with depression and hopelessness indicate increased risk of suicidal behavior in girls, as well as boys. 相似文献
A 60-item questionnaire on conceptions of learning was mailed to students taking preparatory courses by distance learning
with The Open University in the United Kingdom. Complete data were provided by 372 respondents. Their scores on six factor-based
scales showed satisfactory internal consistency, cluster analysis identified five groups of students with distinct patterns
of scores, and discriminant analysis identified the scales that served to distinguish among the clusters. Three groups had
conceptions of learning based on critical thinking, personal development, and personal change, but the other groups had conceptions
that were defined in largely negative terms. Adult learners embarking on distance education seem to hold distinctive conceptions
of learning, which suggests that conceptions of learning are culturally and contextually dependent. 相似文献
In this article I elaborate a theoretical framework for examining teacher professionalism as an enacted discourse of power. Central to this framework is an understanding of professionalism as a process that relates to the ways teachers attempt to influence the quality and character of their work. For subject teaching associations this process connects to issues of power such as teacher participation in educational policy‐making, and the advocacy of subject interests. In this article I theorise professionalism as enacted by subject teaching associations, arguing that the enacted form is shaped by changing structural, cultural and agential variables. Finally, I explore the interactive relationship between structure, culture and agency in the work of subject teaching associations, and present a working model through which enacted professionalism may be analysed and interpreted. 相似文献
This article reports on the findings of a research project (Exploring the Field) carried out with two Year 6 classes during the period of the FIFA World Cup in 2006. Drawing on Elaine Millard’s concept of ‘fusion literacy’ the pupils’ contributions to individual journals and a class blog are analysed. Key findings relate to ways in which the content of the project, which accorded with many of the pupils’ interests, combined powerfully with the communicative channels offered by the journals and blog. This combination gave some pupils new opportunities to find a writing voice and, given the global status of the tournament, raised particular issues about identity. 相似文献
Seven- and eight-year-old deaf children and hearing children of equivalent reading age were presented with a number of tasks designed to assess reading, spelling, productive vocabulary, speechreading, phonological awareness, short-term memory, and nonverbal intelligence. The two groups were compared for similarities and differences in the levels of performance and in the predictors of literacy. Multiple regressions showed that both productive vocabulary and speechreading were significant predictors of reading for the deaf children after hearing loss and nonverbal intelligence had been accounted for. However, spelling ability was not associated with any of the other measures apart from reading. For hearing children, age was the main determinant of reading and spelling ability (due to selection criterion). Possible explanations for the role of speechreading and productive vocabulary in deaf children's reading and the differences between the correlates of literacy for deaf and hearing children are discussed. 相似文献
Primary objective. To examine perceptions of academic quality and approaches to studying in students taking six technology courses by distance education.
Research design. Students taking four courses received an end-of-course questionnaire. The following year, students taking all six courses received a mid-course questionnaire.
Method. The Course Experience Questionnaire and the Revised Approaches to Studying Inventory were administered in a postal survey to 3539 students of the UK Open University.
Outcomes and results. Across successive levels of study, students were progressively less likely to adopt a deep approach, were more likely to adopt a surface approach and rated their courses less favourably, especially with regard to the workload and materials. Between the middle and end of a course, students were more likely to adopt a deep approach and gave more positive ratings with regard to the materials and amount of choice.
Conclusions. The survey instruments can be recommended as useful tools for monitoring the experiences of engineering and technology students. 相似文献
Editors of 10 North American Family Medicine journals simultaneously published a Joint Call for Action to address systemic racism and encourage diversity, equity, inclusion and accessibility/antiracism (DEIA) initiatives in medicine and medical publishing in January 2021.
The efforts of the journals since publication of the joint editorial are summarized and include working to diversify editorial teams, editorial boards and authors; enhanced content about DEIA topics; mentoring of authors who are underrepresented in medicine (URM); and presenting content related to DEIA in Family Medicine publishing at national meetings.
Editors had a follow up meeting in November 2022 to continue working toward a common goal of reducing racism and increasing DEIA initiatives in Family Medicine publications.