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排序方式: 共有105条查询结果,搜索用时 15 毫秒
1.
Roger T. Kelleher William C. Riddle Leonard Cook 《Journal of the experimental analysis of behavior》1963,6(4):507-517
Squirrel monkeys were trained on a multiple schedule in which 10-min periods on a continuous shock avoidance schedule, indicated by a yellow light, alternated with 10-min periods on a 1.5-min variable interval schedule of food reinforcement (VI 1.5). A white light indicated that VI 1.5 was in effect, except for the middle 2 min of the period on VI 1.5, in which a blue light appeared and terminated with the delivery of a 0.5-sec unavoidable shock. Stable response rates developed in the avoidance and VI 1.5 components. However, the highest response rates occurred in the blue, preshock stimulus. A series of experiments showed that responding in the blue stimulus persisted even when responding had been extinguished on both the VI schedule of food reinforcement and the shock avoidance schedule. Responding in the blue stimulus ceased when the blue stimulus terminated without shock or when it terminated with a response-contingent shock. Each time responding ceased, it was restored by terminating the blue stimulus with an unavoidable shock. When the blue stimulus was on throughout each session and unavoidable shocks were delivered at regular 10-min intervals, responding was well maintained. These results show that in monkeys that have been trained on a continuous avoidance schedule, unavoidable shocks can maintain responding even under conditions where responses have no programmed consequences. 相似文献
2.
James L. Rae William R. Riddle William C. Law Norman T. Welford 《Behavior research methods》1977,9(4):341-344
A simple synchronizer clock circuit is described that aids in the rejection of 60-Hz noise from evoked potential measurements. 相似文献
3.
Effects of environmental enrichment on spatial memory and neurochemistry in middle-aged mice 总被引:7,自引:0,他引:7 下载免费PDF全文
Frick KM Stearns NA Pan JY Berger-Sweeney J 《Learning & memory (Cold Spring Harbor, N.Y.)》2003,10(3):187-198
The present study compared the effects of environmental enrichment on spatial memory, glutamic acid decarboxylase (GAD) activity, and synaptophysin levels in middle-aged male and female mice. Prior to testing, a subset of 18-month-old male and female C57BL/6 mice was housed with two to three toys and a running wheel in the home cage for up to 29 d. Adult mice (7 mo) of both sexes and the remaining middle-aged mice were group (social) housed, but not exposed to enriching objects. After the enrichment period, all mice were tested in a 1-day version of the Morris water maze, in which both spatial and nonspatial memory were assessed. Immediately after testing, the hippocampus and frontoparietal cortex were dissected, and GAD activity and synaptophysin levels were measured. Environmental enrichment reduced the age-related impairment in spatial acquisition and retention; relative to adult social controls, middle-aged enriched mice were unimpaired, whereas middle-aged social controls were impaired. This reduction was similar in middle-aged males and females. Enrichment did not affect cued memory in either sex. Although hippocampal GAD activity was increased by enrichment in males, all other neurochemical measurements were unaffected by enrichment or aging in either sex. These data suggest that environmental enrichment initiated at middle age can reduce age-related impairments in spatial memory in males and females, although the underlying neurobiological mechanisms of this effect remain unknown. 相似文献
4.
Heller MA Kennedy JM Clark A Mccarthy M Borgert A Wemple L Fulkerson E Kaffel N Duncan A Riddle T 《Perception》2006,35(10):1397-1420
In the first three experiments, subjects felt solid geometrical forms and matched raised-line pictures to the objects. Performance was best in experiment 1 for top views, with shorter response latencies than for side views, front views, or 3-D views with foreshortening. In a second experiment with blind participants, matching accuracy was not significantly affected by prior visual experience, but speed advantages were found for top views, with 3-D views also yielding better matching accuracy than side views. There were no performance advantages for pictures of objects with a constant cross section in the vertical axis. The early-blind participants had lower performance for side and frontal views. The objects were rotated to oblique orientations in experiment 3. Early-blind subjects performed worse than the other subjects given object rotation. Visual experience with pictures of objects at many angles could facilitate identification at oblique orientations. In experiment 5 with blindfolded sighted subjects, tangible pictures were used as targets and as choices. The results yielded superior overall performance for 3-D views (mean, M = 74% correct) and much lower matching accuracy for top views as targets (M = 58% correct). Performance was highest when the target and matching viewpoint were identical, but 3-D views (M = 96% correct) were still far better than top views. The accuracy advantage of the top views also disappeared when more complex objects were tested in experiment 6. Alternative theoretical implications of the results are discussed. 相似文献
5.
Delay discounting occurs when the subjective value of an outcome decreases because its delivery is delayed. Previous research has suggested that the rate at which some, but not all, outcomes are discounted varies as a function of regular church attendance. In the present study, 509 participants completed measures of intrinsic religiousness, extrinsic religiousness, religious fundamentalism, and whether they regularly attended church services. They then completed a delay-discounting task involving five outcomes. Although religiousness was not a significant predictor of discounting for all outcomes, participants scoring high in intrinsic religiousness tended to display less delay discounting than participants scoring low. Likewise, participants scoring high in religious fundamentalism tended to display more delay discounting than participants scoring low. These results partially replicate previous ones in showing that the process of discounting may vary as a function of religiousness. The results also provide some direction for those interested in altering how individuals discount. 相似文献
6.
Jennifer L. Lapum Jennifer Martin Karyn Kennedy Catherine Turcotte Heather Gregory 《Journal of aggression, maltreatment & trauma》2013,22(5):566-580
The primary treatment for individuals who have encountered violence and/or abuse is trauma-focused cognitive and behavioral modalities. However, these therapeutic approaches are not always effective for youth who have encountered this type of trauma. Trauma is often communicated through the body via physical ailments, particularly when words are insufficient to capture an individual’s experience or when adequate processing of the trauma is not possible due to profound stress. Dance offers an alternative form of therapy that can address “where” the trauma is held, relieve tension, and restore a sense of ownership with one’s body and mind. In this article, we discuss the development of Sole Expression, a trauma-informed hip-hop dance program for youth who have experienced abuse and/or exposure to violence. We provide an overview of establishing the team, securing funding, trauma training, program curriculum, and the related research. We conclude with recommendations for best practices that benefit both practitioners and the young people served. 相似文献
7.
8.
Howard W. Stone David R. Cross Karyn B. Purvis Melissa J. Young 《Pastoral Psychology》2003,51(4):327-340
A majority of Americans participate in religious services and identify themselves as members of a faith community. Understanding the role that religion plays in people's lives is essential to developing a comprehensive model of social support during times of crisis. The purpose of the current study was to identify the resources of social support that are helpful for church members during times of crisis. Although research on the impact of social support has identified several types of support—and the function of such support—to people undergoing difficult times, researchers have not looked at the impact of religious beliefs and participation in religious communities on social support to any significant extent. The current study collected questionnaire data from 23 members of one congregation who experienced a personal crisis. Analysis of the data shows that religious beliefs and the support provided by the religious community were seen as extremely helpful in times of crisis. Implications for incorporating people's religious beliefs and participation in religious communities into future investigations of social support are discussed. 相似文献
9.
Louisa M Slowiaczek Emily G Soltano Shani J Wieting Karyn L Bishop 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2003,56(2):233-262
The possible influence of initial phonological and/or orthographic information on spoken-word processing was examined in six experiments modelled after and extending the work Jakimik, Cole, and Rudnicky (1985). Following Jakimik et al., Experiment 1 used polysyllabic primes with monosyllabic targets (e.g., BUCKLE-BUCK/[symbol: see text]; MYSTERY-MISS,/[symbol: see text]). Experiments 2, 3, and 4 used polysyllabic primes and polysyllabic targets whose initial syllables shared phonological information (e.g., NUISANCE-NOODLE,/[symbol: see text]), orthographic information (e.g., RATIO-RATIFY,/[symbol: see text]), both (e.g., FUNNEL-FUNNY,/[symbol: see text]), or were unrelated (e.g., SERMON-NOODLE,/[symbol: see text]). Participants engaged in a lexical decision (Experiments 1, 3, and 4) or a shadowing (Experiment 2) task with a single-trial (Experiments 2 and 3) or subsequent-trial (Experiments 1 and 4) priming procedure. Experiment 5 tested primes and targets that varied in the number of shared graphemes while holding shared phonemes constant at one. Experiment 6 used the procedures of Experiment 2 but a low proportion of related trials. Results revealed that response times were facilitated for prime-target pairs that shared initial phonological and orthographic information. These results were confirmed under conditions when strategic processing was greatly reduced suggesting that phonological and orthographic information is automatically activated during spoken-word processing. 相似文献
10.