Conditioned inhibition of analgesia     

Eric P. Wiertelak  Linda R. Watkins  Steven F. Maier 《Learning & behavior》1992,20(4):339-349

Stimuli that predict the occurrence of aversive events come to elicit conditioned analgesia. Experiments 1A and 1B examined the possibility that conditioning can inhibit analgesia when stimuli are paired in a backward fashion with a shock US (Pavlovian CS- s). Analgesia conditioned in response to shock context exposure was reversed during the CS- (light) presentation after four sessions. The ability of the CS- to function as a conditioned inhibitor of analgesia was then evaluated in both summation (Experiment 1A) and retardation-of-acquisition testing (Experiments 1A and 1B). The results support the conclusion that a stimulus presented after shock in a backward fashion comes to be a conditioned inhibitor of analgesia. Experiments 2A and 2B examined the assumption that the results obtained with our pain sensitivity measure (tailflicking in response to radiant heat) reflect changes in responsiveness to painful input, rather than a general motor inhibition or general insensitivity to sensory input. In Experiment 2A, tailflick responding to painful and nonpainful input was compared in animals receiving either morphine or saline. In Experiment 2B, tailflick responding to painful and nonpainful input to the tail was compared in both the shock and a neutral context. In both experiments, only the painful input yielded changes in responsivity. The results support the conclusion that the alterations in pain sensitivity produced by the CS- for shock represents a conditioned inhibition specific to pain.  相似文献   

Contextual cues and the retrieval of competing memories of goal events     

Steven J. Haggbloom  Kelly M. Morris 《Learning & behavior》1994,22(2):165-172

In Experiment 1, four groups of rats were initially trained on a discrimination which established a stimulus as a signal for reinforcement. That signal was then presented during subsequent partial reinforcement training in a way that could potentially interfere with retrieval of the memory of nonreinforcement (S^N) on the preceding trial either because (1) thestorage and retrieval contexts for S^N were different (retrieval failure hypothesis), or (2) the memory of reinforcement produced by the signal acted as a competing memory (competing memory hypothesis). Experiment 1 supported the competing memory hypothesis. In Experiment 2, we investigated the effect of stimulus change on the capacity of the context to retrieve a competing memory of a temporally remote reinforcement event with which the context was strongly associated. Retrieval of a competing memory was impaired by differences between the storage and retrieval contexts in a manner analogous to the effect of context on retrieval of a reinforcement event memory from an immediately preceding trial.  相似文献   

Family of origin environments in two clinical samples of survivors of intra-familial, extra-familial, and both types of sexual abuse     

Gold SN  Hyman SM  Andrés-Hyman RC 《Child abuse & neglect》2004,28(11):1199-1212

OBJECTIVE: It has been suggested that survivors of ongoing childhood sexual abuse (CSA) tend to have been reared in ineffective family environments that render them particularly vulnerable to maltreatment and which foster psychological difficulties beyond those accounted for solely by their abuse. If this conjecture is valid, one would expect that the family of origin environments of CSA survivors would be disturbed whether their abuser was intra-familial or extra-familial. To assess this hypothesis, two studies compared the childhood family of origin environments and supportive parenting characteristics of a clinical sample of women sexually abused by family members only (the intra-familial group), by non-family members only (the extra-familial group), and by both family and non-family members (the "both" group). METHOD: Study 1 compared the three groups (total N = 213) using the Family Environment Scale (FES). Study 2 compared groups (total N = 86) on the positive parenting scales of the Exposure to Abusive and Supportive Environments Parenting Inventory (EASE-PI). RESULTS: In Study 1, multivariate analyses indicated significant differences on the independence, cohesion, and conflict subscales of the FES. Pairwise comparisons revealed that the extra-familial group reported significantly higher levels of family independence and lower levels of conflict than the other two groups. In addition, the extra-familial group reported higher levels of cohesion than the intra-familial group. However, the effect sizes of these comparisons were extremely small. In Study 2, multivariate analyses revealed no group differences on the EASE-PI scales. CONCLUSIONS: Low effect sizes on the three significant FES scales, non-significance on the remaining seven FES scales, and non-significance on the EASE-PI scales suggest that there is considerable similarity in the family of origin environments of adult female CSA survivors seeking therapy regardless of whether their perpetrators were family members, non-family members, or both family and non-family members.  相似文献   

Teaching self-instruction to high school students     

Jack Martin  Steven Norris 《International journal for the advancement of counseling》1985,8(4):341-353

In an attempt to demonstrate the effectiveness of instructional programming in counseling, an experimental evaluation of a ten-week program aimed at teaching skills and strategies of self-instruction to high school students was conducted. Thirty-two grade ten students were assigned randomly to an experimental self-instruction group and a control group. Dependent variables included Rotter's (1966) Control of Reinforcement Questionnaire, Rosenbaum's (1980) Self-control Schedule, a curriculum-specific test of self-instruction concepts, and a transfer test. Results revealed that students in the experimental, self-instruction program outperformed students in the control group on all dependent variables except for the Self-control Schedule. Content analysis of student responses to the transfer test showed a distinct pattern of skill development in the experimental group from pretest to posttest. Implications for the development and offering of instructional counseling programs are drawn.Many students of counseling have argued that counseling is essentially a kind of teaching (Carkhuff and Berenson, 1976; Ellis, 1977; Katz and Ivey, 1977; Krumboltz and Thoresen, 1976; Sorenson, 1967). More recently, Martin and his colleagues have developed an approach to counseling that employs models of instruction as a basis for the development and implementation of a broad range of counseling interventions and programs (Hiebert et al., 1981; Martin and Hiebert, 1982; Martin et al., 1981; Martin et al., 1980). Martin (1983) also has suggested that counselors in schools and elsewhere can make use of systematic teaching programs to help clients/students acquire functional skills in a variety of areas such as anxiety management, decision making, interpersonal skills, and so forth. In the development and offering of such programs, counselors act as curriculum developers and instructors. Initial evidence for the viability of this type of instructional counseling in schools was provided by Haynes et al. (1983), and Leal, Baxter, Martin, and Marx (1981) who developed programs based on cognitive and behavioral counseling methods that were successful in alleviating the test anxieties experienced by high school students. The experiment reported here extends the work of Martin and others in instructional counseling by evaluating an instructional program designed to teach a series of integrated skills of self-instruction to high school students. [Note that the term self-instruction is used here to refer to the activities of people engaged in systematic self-change, and is not intended to connote the system of self-instruction training developed by Donald Meichenbaum (1977).]Nearly all teachers and curriculum specialists share at least one goal: to help students acquire the capacity to engage in self-directed learning. Most often, it is assumed that school students will acquire skills in areas such as self-instruction and critical thinking (skills often seen as necessary requisites to self-directed learning) as a result of stimulating interactions with traditional school curricula. A frequently voiced alternative is to attempt to teach such skills directly (cf. Beyers, 1984a, 1984b), more or less as a curriculum in their own right. Many attempts have been made to do this, but few have received detailed empirical, experimental analysis. In a recent meta-analysis of primary prevention studies conducted in schools, Baker, Swisher, Nadenichek, and Popowicz (1984) found 40 such studies that had been conducted since 1970. Most of the experimental programs in the studies reviewed were targeted at improving students' communication skills, decision making and problem solving skills, and self-awareness. None of the studies reviewed by Baker et al. included instructional interventions that attempted to teach a broad range of skills and strategies that would permit students to plan, implement, and evaluate programs of personal change and development. Teaching school pupils to engage in systematic self-instruction for purposes of personal change simply has not been attempted, to date, in the context of an experimentally controlled investigation. Given an increasing number of pleas for exactly this kind of broad-based school programming (Martin, 1983; Sprinthall, 1984), the need for controlled experimental studies in this area is acute.Self-introduction or learning to learn has been the subject of considerable theorizing by both cognitive and instructional psychologists (Gagné, 1977; Bransford, 1979). Experimental work by Ann Brown and her colleagues (Brown, 1978; Brown et al., 1979) has highlighted the difficulty of teaching various metacognitive strategies that would seem basic to the capacity to self-instruct so as to ensure the transfer of such strategies to tasks other than those employed during strategy acquisition. At the same time, Brown's research also shows that the teaching of generalizable metacognitive strategies such as self-testing is possible, even with educable retarded children (Brown, et al., 1979). Other research concerned with differences between expert and novice knowledge has highlighted the importance of the ability to access declarative knowledge stores and the availability of relevant procedural knowledge in attempting to explain these differences (Chi et al., 1982; Leinhardt, 1983). [See Anderson, (1980) for formal definitions and discussions of declarative and procedural knowledge.] The greater ability of experts to function as independent learners or self-instructors in their areas of expertise likely is related to such differences. While it sometimes is unclear as to whether self-instructional competence resides in procedural knowledge stores or cognitive and/or metacognitive strategies, it seems clear that learning to learn involves more than simply acquiring necessary declarative knowledge in relevant substantive areas (Glaser, 1984). Thus, explicit, direct instruction in skills and strategies of self-instruction probably is necessary if students in schools are to learn to direct their own learning and development.The experiment reported here was conducted to supply initial experimental data about the possible effectiveness of a program designed to teach skills and strategies of self-instruction to high school students. It is a study of a ten-week instructional counseling program developed to teach self-instruction skills in areas such as decision making, gathering information, self-assessment, framing objectives, planning, and self-evaluation. As such, it is a more comprehensive program than other programs of primary prevention in schools that have been studied experimentally. While a variety of school and extracurricular situations were employed as illustrative contexts for presenting information about these skills to the students, the goal of the experimental program was to teach the self-instruction skills as detached skills that could be applied to a variety of situations and life circumstances. This approach was viewed as contrasting with traditional approaches in which such skills are thought to be acquired indirectly as a result of working through a series of tasks in defined substantive areas such as mathematics, history, or physics. In this latter method, it is likely that such skills, if they are acquired, become embedded in specific substantive contexts and are therefore less likely to generalize to situations or contexts other than those in which they were acquired (see Rigney, 1978 for the distinction between detached and embedded strategies). Dependent variables employed in the study were selected to test for the acquisition and transfer of targeted skills as well as for the acquisition of underlying beliefs about one's ability to control or influence external and internal events. The latter type of learning is thought by many counselors to be of great importance, particularly if attitudes and beliefs are learned that affect clients' attributional styles and/or tendencies (Strong and Claiborn, 1982).The overall purpose of the experiment was to determine whether instructional counseling curricula could be developed that would succeed in teaching detached strategies/skills of self-instruction to high school students. Should such instruction be possible, additional support would be provided for the notions of instructional counseling and counselors as curriculum developers and instructors. After all, a major part of counseling typically is associated with assisting clients to make decisions, gather information, frame goals and objectives, assess their situations and capabilities, plan actions, and evaluate the effects of their actions—all components of the self-instruction program taught to the experimental students in this study.The specific hypotheses investigated were that participation in the experimental instructional counseling program would increase: 1) students' knowledge of self-instruction skills (acquisition learning), 2) students' abilities to apply this knowledge to everyday events (transfer learning), and 3) students' attitudes consistent with higher levels of self-control and internal attributional processes (general attitudinal learning).The research reported here was supported by a grant from the Chairpersons' Research Fund, Simon Fraser University.The authors gratefully acknowledge the assistance of Bruce Dallin, Louise Bourassa, Olwyn Irving, David Langton and the Abbotsford School District (British Columbia, Canada) in completing this work.  相似文献   

Conditioned and unconditioned stress-induced analgesia: Stimulus preexposure and stimulus change     

Steven F. Maier  Linda R. Watkins 《Learning & behavior》1991,19(4):295-304

Aversive events such as electric shock lead to analgesia. There have been differing views with regard to whether the aversive event itself can lead to analgesia as a direct unconditioned reaction, or whether the analgesia is instead a reaction to fear conditioned to cues present during shock or to other associative processes initiated by the aversive event. Maier (1989, 1990) has argued that aversive events such as shock lead to both types of analgesia, with the type observed depending on test conditions. Unconditioned analgesia was argued to be present soon after shock, with conditioned analgesia replacing the unconditioned form if the subject is allowed to remain in the shock environment. Consistent with this argument, the experiments reported here show that (1) preexposure to the environment in which shock later occurs has no effect on the analgesia soon after shock, but eliminates the later analgesia; (2) the initial postshock analgesia is unaffected by removing the subject from the shock environment to a different environment, but the later reaction is prevented by such a change; (3) returning the subject to the shock environment after confinement in a nonshock environment rearouses an analgesic reaction; and (4) this rearousal does not occur if the subject has first been confined to the shock environment without shock.  相似文献   

Mapping the development of a new MA programme in higher education: comparing privately held perceptions of a public endeavour     

Ian Kinchin  Anesa Hosein  Emma Medland  Simon Lygo-Baker  Steven Warburton  Darren Gash 《Journal of Further & Higher Education》2017,41(2):155-171

After spending a year working on the development of a new online Master’s programme in higher education, members of the development team were interviewed to reveal their thoughts about the nature of the programme. The dialogue of each interview was summarised as a concept map. Analysis of the resulting maps included a modified Bernsteinian analysis of the focus of the concepts included in terms of their semantic gravity (i.e. closeness to context) and the degree of resonance with the underpinning regulative discourse of the programme. Data highlight a number of potential issues for programme delivery that centre around the use of appropriate language to manage student expectations in relation to the process of learning and the emotional responses this can stimulate, as well as the tensions that can be foregrounded between the demands of teaching and research within a university environment.  相似文献   

Adult education,vocational education and economic policy: theory illuminates understanding     

Steven Hodge  Marcella Milana  Richard Waller  Susan Webb 《International Journal of Lifelong Education》2020,39(2):133-138

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Transforming an Introductory Programming Course: From Lectures to Active Learning via Wireless Laptops     

Miri Barak  Judson Harward  George Kocur  Steven Lerman 《Journal of Science Education and Technology》2007,16(4):325-336

Within the framework of MIT’s course 1.00: Introduction to Computers and Engineering Problem Solving, this paper describes an innovative project entitled: Studio 1.00 that integrates lectures with in-class demonstrations, active learning sessions, and on-task feedback, through the use of wireless laptop computers. This paper also describes a related evaluation study that investigated the effectiveness of different instructional strategies, comparing traditional teaching with two models of the studio format. Students’ learning outcomes, specifically, their final grades and conceptual understanding of computational methods and programming, were examined. Findings indicated that Studio-1.00, in both its extensive- and partial-active learning modes, enhanced students’ learning outcomes in Java programming. Comparing to the traditional courses, more students in the studio courses received “A” as their final grade and less failed. Moreover, students who regularly attended the active learning sessions were able to conceptualize programming principles better than their peers. We have also found two weaknesses in the teaching format of Studio-1.00 that can guide future versions of the course.  相似文献   

Understanding kiosk navigation: Using log files to capture hypermedia searches     

Sasha A. Barab  Bruce E. Bowdish  Michael F. Young  Steven V. Owen 《Instructional Science》1996,24(5):377-395

The purposes of these studies were to investigate: a) the role of different intentions for constraining kiosk searches; b) whether selected variables related to reading comprehension (e.g., prior content knowledge) were also related to document search; and c) the potential of log files (timed-stamped records of students' navigational choices in the kiosk) as a non-intrusive tool for seamlessly capturing navigational performance. In Study 1, 64 college students were recruited and randomly assigned to one of two conditions. Both groups used an identical computer kiosk. However, one condition used the kiosk to address a specific problem, while the other condition used the kiosk based on their own interests-no specific task was provided. A discriminant function analysis was able to improve prediction about the group membership by 79% (adjusted with Cohen's Kappa) over and above chance. In Study 2, 54 participants were randomly assigned a simple or complex task. Participants were pretested on prior topic knowledge and solutions were rated based on a composite of navigational scores. Although prior content knowledge and the interaction were not significant, the type of task assigned was related to the quality of solution. These results provide further reason to distinguish between document search and reading comprehension. Further, they suggest new tools for assessment (log files) that have implications for many computerized applications, including hypertext, hypermedia, and the World Wide Web.University of Connecticut at Storrs  相似文献   

The influence of a peer-tutoring training model for implementing cooperative groupings with elementary students     

Leslie R. Nath  Steven M. Ross 《Educational technology research and development : ETR & D》2001,49(2):41-56

This study examined the effects of peer-tutoring training on elementary school student communication and collaboration skills when used in conjunction with cooperative learning. Within six classes (grades 2–6) in an inner-city school, cooperative learning pairs were randomly assigned to two groups (control and training). Multivariate analyses of variance (MANOVA) of quantitative data from a systematic observation instrument used over an entire year showed that, in general, the training group surpassed the control group in both communication and collaborative skills. Students in grades 2–3 showed substantially more improvement than students in grades 4–6; also, students with average or below-average reading levels required more time to acquire these skills than did above-average students. The qualitative data further substantiated these findings while revealing a large variation among teachers in implementing cooperative learning. and is Editor of the Research section of this journal.  相似文献