Comparison of retention and extinction of a visual discrimination as an index of forgetting in mice     

Béatrice Alescio-Lautier  Bernard Soumireu-Mourat 《Learning & behavior》1986,14(2):197-204

The retention and extinction of a visual discrimination was examined in BALB/c mice. The mice were trained to perform a go/no-go discrimination task in parallel runways. Initial training resulted in an intermediate level of performance. Testing consisted of an additional session using either retention (Experiment 1) or extinction (Experiment 2) at one of five time intervals between 1 and 30 days. It was found in Experiment 1 that forgetting progressively increased over intervals of between 14 and 30 days. In Experiment 2, extinction testing induced more impairment of performance, so that forgetting occurred earlier relative to retention testing in Experiment 1. However, in both experiments, the measure of performance by a discrimination ratio revealed the same amount of forgetting when the training-test interval was 30 days. These results define the forgetting curve for such a discrimination by mice. They are discussed in terms of possible factors involved in forgetting.  相似文献   

Adjunctive drinking during variable and random-interval food reinforcement schedules     

J. R. Millenson  Robert B. Allen  Steven Pinker 《Learning & behavior》1977,5(3):285-290

Rats were trained to leverpress for food and subsequently exposed to either arithmetic series or random variable-interval reinforcement schedules. Adjunctive drinking developed in all subjects exposed to arithmetic variable-interval reinforcement, but did not develop in six of the eight animals trained on the random schedule. The results suggest that adjunctive drinking is the result of an interaction between the tendency of rats to drink after eating and the ability of locally low probabilities of reinforcement within schedules to induce conditioned behavioral states.  相似文献   

Practicum Placement in a Counseling-Employment Agency for Disadvantaged Youth     

Paul A. Payne  Robert B. Mills 《Counselor Education & Supervision》1970,9(3):189-193

In order to emphasize the development of skills in helping the culturally disadvantaged, graduate students were given practicum placement in a Department of Labor-financed agency which gave counseling and employment training to disadvantaged youth. Students attended staff meetings, interviewed staff members concerning the work they performed, and discussed client contacts with caseworkers, in addition to interviewing agency clients. Increased awareness of problems, broadened conceptualizations, and expansion of interpersonal skills were seen as advantages of the practicum. Limitations included some lack of goal clarity and inefficiency of time use in dealing with this clientele.  相似文献   

Modeling problem solving inquiry processes     

Paul B. Otto 《Journal of Science Teacher Education》1991,2(2):37-39

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A causal model of students' achievement in a college physics course     

Audrey B. Champagne  Leopold E. Klopfer 《科学教学研究杂志》1982,19(4):299-309

To explain students' achievement in the mechanics segment of a college physics course, a causal model is proposed whose variables are the three constructs: Newtonian physics, math ability, and science experience. Each variable specifies several variates, whose numerical values were measured and intercorrelations computed. The Factorial Modeling (FaM) procedure is applied to the data to estimate the coefficients of the proposed model's structural equations. The FaM results indicate that the model is plausible and that its first two variables account for approximately 34% of the variance in the criterion variate, students' mechanics achievement. The implications of the findings for physics instruction are discussed.  相似文献   

Effects of thematic‐based,hands‐on science teaching versus a textbook approach for students with disabilities     

Cheryl B. McCarthy 《科学教学研究杂志》2005,42(3):245-263

Institutions of higher education, states, and local K–12 districts have been challenged to improve math and science education for our nation's students. In the past few years, there has been renewed interest in inquiry‐based, activity‐oriented instruction in science for students with disabilities. Yet, there still exists the need for further empirical evidence to support instructional improvements for students with more involved emotional and behavioral disabilities. This study describes a program in which 18 middle school students with serious emotional disturbances were instructed, over the course of 8 weeks, on “Matter” by two different instructional approaches. Students in one classroom received a traditional textbook approach to science content, whereas students in another classroom received science instruction by a hands‐on, thematic approach. Over the course of instruction, data were collected regarding students' behavior and achievement. Results indicate that, overall, students in the hands‐on instructional program performed significantly better than the students in the textbook program on two of three measures of science achievement, a hands‐on assessment and a short‐answer test. The students did not differ on a multiple‐choice format test. With regard to behavior, there were no significant differences in behavioral problems found between the two groups of students over the course of the study. Findings are discussed in relation to instructional implications for students with disabilities in the science classroom. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 245–263, 2005  相似文献   

A Second Dystopia in Education: Validity Issues in Authentic Assessment Practices     

John D. Hathcoat  Jeremy D. Penn  Laura L. B. Barnes  Johnathan C. Comer 《Research in higher education》2016,57(7):892-912

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Motor activity, anticipated motor activity, and young children's associative learning.     

B G Bender  J R Levin 《Child development》1976,47(2):560-562

The purpose of this study was to determine whether motor activity, previously assumed necessary to induce imagery in young children's associative learning, actually has to be executed. The results of our experiment with kindergartners clearly suggest not: In conditions where subjects simply planned to the potential motor activity (without executing it), learning was enhanced. Further, the temporal proximity of the planning to the potential motor activity did not prove to be important. These results, combined with those from 2 follow-up experiments, give rise to the speculation--among others--that young children can be "tricked" into imagery generation through appropriately worded instructions.  相似文献   

Early Identification and Intervention: Head Start's Response to Mental Health Challenges     

Michael L. Lopez  Louisa B. Tarullo  Steven R. Forness  Cheryl A. Boyce 《Early education and development》2000,11(3):265-282

Serving low-income children from birth to age five and their families, Head Start is a primary venue for identification and intervention in the area of child mental health. However, recent research has demonstrated that the knowledge base regarding prevalence, developmental course, and predictive power of child mental health problems is lacking for young children in general and low-income, diverse populations in particular. Head Start's agency-level data is often discrepant from both national estimates and small, intensive studies of similar populations, perhaps for reasons related to availability of community services and professional staff, as well as concerns about stigmatization. Following on recent expert recommendations, new collaborative Federal initiatives are underway to increase our understanding of the types, trajectories, and treatments of mental health problems affecting the vulnerable children served by Head Start. The paper concludes with a call to action for the field in the area of young children's mental health.  相似文献   

What they're reading—The campus' new shared responsibility     

David B. Spano 《About Campus》2005,10(4):30-32

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