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181.
Positive and negative contrast as a function of component duration for key pecking and treadle pressing 总被引:8,自引:8,他引:0 下载免费PDF全文
McSweeney FK 《Journal of the experimental analysis of behavior》1982,37(2):281-293
Pigeons responded on several multiple schedules for food reinforcers. The duration of the components varied from four seconds to 16 minutes. The absolute size of positive (Experiment 1) and negative (Experiment 2) behavioral contrast varied inversely with component duration when key pecks produced the reinforcers. The absolute size of negative contrast varied directly with component duration, when treadle presses produced the reinforcers (Experiment 3). These results conform to theories that suggest that positive and negative contrast are symmetrical when pigeons peck keys. They also conform to theories that suggest that the same principles do not govern contrast when pigeons peck keys as when they press treadles. Finally, the results support the measurement of behavioral contrast by the differences between baseline rates of responding and the rates emitted when contrast is present. 相似文献
182.
Relationship between response rate and reinforcement frequency in variable-interval schedules: III. The effect of d-amphetamine. 总被引:3,自引:3,他引:0 下载免费PDF全文
C M Bradshaw H V Ruddle E Szabadi 《Journal of the experimental analysis of behavior》1981,36(1):29-39
Four rats were exposed to variable-interval schedules specifying a range of different reinforcement frequencies. The effects of two doses of d-amphetamine (1.6 and 3.2 mumol/kg) upon performance maintained under each schedule were examined. In the case of each rat, the response rates observed under control conditions (no injection or injection of the vehicle alone) were increasing, negatively accelerated functions of reinforcement frequency, the data conforming closely to Herrnstein's (1970) equation. In each rat, d-amphetamine (3.2 mumol/kg) significantly reduced the value of the constant Rmax, which expresses the theoretical maximum response rate. In each rat, the value of KH, which expresses the reinforcement frequency needed to obtain the half-maximal response rate, was also reduced, although this only achieved statistical significance in the case of one rat. When the proportional change in response rate in the presence of the drug was plotted against the response rate under control conditions on double logarithmic co-ordinates, linear functions of negative slope were obtained; in each rat the slope was steeper and the value of the control response rate at which d-amphetamine exerted no effect was lower in the case of the higher dose (3.2 mumol/kg) than in the case of the lower dose (1.6 mumol/kg). 相似文献
183.
用回归旋转设计研究倒摄抑制。实验数据最后用二次方程逼近并取得拟合检验的显著性水平(P<0.01)。本实验揭示了(1)影响倒摄抑制的四个因素中,先前材料的学习程度(A)和后继学习材料的长度(C)这两个因素起主要作用。当A足够时,不论C的长短,倒摄抑制相对而言总是最小。这说明A因素起最主要作用;(2)在A足够的前提下,C因素与倒摄抑制成正比函数关系。本研究的成功实验表明,回归旋转设计不仅适用于心理学研究而且能揭示心理现象在多因素共同作用下变化的函数关系。因此,它比心理学研究的传统设计方法又前进了一步。 相似文献
184.
Barry C. Arnold Robert J. Beaver Richard A. Groeneveld William Q. Meeker 《Psychometrika》1993,58(3):471-488
Inference is considered for the marginal distribution ofX, when (X, Y) has a truncated bivariate normal distribution. TheY variable is truncated, but only theX values are observed. The relationship of this distribution to Azzalini's skew-normal distribution is obtained. Method of moments and maximum likelihood estimation are compared for the three-parameter Azzalini distribution. Samples that are uniformative about the skewness of this distribution may occur, even for largen. Profile likelihood methods are employed to describe the uncertainty involved in parameter estimation. A sample of 87 Otis test scores is shown to be well-described by this model. 相似文献
185.
On a given variable-interval schedule, the average obtained rate of reinforcement depends on the average rate of responding. An expression for this feedback effect is derived from the assumptions that free-operant responding occurs in bursts with a constant tempo, alternating with periods of engagement in other activities; that the durations of bursts and other activities are exponentially distributed; and that the rates of initiating and terminating bursts are inversely related. The expression provides a satisfactory account of the data of three experiments. 相似文献
186.
Inhibiting function of reinforcement: magnitude effects on variable-interval schedules 总被引:3,自引:3,他引:0 下载免费PDF全文
Harzem P Lowe CF Priddle-Higson PJ 《Journal of the experimental analysis of behavior》1978,30(1):1-10
In two experiments, the performance of rats under constant-probability and arithmetic variable-interval schedules respectively was compared when the concentration of a liquid reinforcer was varied within sessions; in other sessions, half of the reinforcers were randomly omitted. When the discriminative function of the reinforcer as a signal for a decrease in the probability of reinforcement was attenuated (the constant-probability schedule) the postreinforcement pause duration was nevertheless an increasing function of reinforcer magnitude. This relationship was also present, but more marked, when the temporal discriminative function of the reinforcer was enhanced (the arithmetic schedule). These results suggested that reinforcement has an unconditioned suppressive effect on the reinforced response distinct from any discriminative function it may acquire. The reinforcement-omission effect, where response rate accelerates following omission, was observed when the reinforcer functioned as an effective temporal discriminative stimulus, but not when such temporal control was absent. 相似文献
187.
Felicitas Rost 《Counselling and Psychotherapy Research》2021,21(1):98-106
Q‐methodology offers unique opportunities for counselling and psychotherapy researchers and clinicians. It is an innovative technique capable of bridging the divide between clinical knowledge and the quantitative systematisation of it. It was initially developed by Stephenson as a data collection and data analytic method to empirically study human subjectivity. It was then extended by the British School to study shared viewpoints, thereby adopting a multi‐participant design and a highly unusual form of qualitative analysis. Finally, it was adapted by the Californian School for use as a standardised observer‐rated assessment tool. Its attractiveness stems from its aptitude to produce holistic data as it collects both quantitative and narrative data. This paper will provide an introduction to Q‐statistics and Q‐methodology (person‐centred) by contrasting it to R‐statistics and R‐methodology (variable‐centred). It will then provide an overview of the three schools of Q‐methodology and their various merits demonstrated with an example. 相似文献
188.
结构方程建模中的题目打包策略 总被引:2,自引:0,他引:2
结构方程建模中题目打包法的优缺点包括:指标数据质量变好、模型拟合程度提高; 估计偏差不大, 可校正; 估计稳定, 但降低了敏感性与可证伪性。打包法的前提条件是单维、同质, 适合结构模型分析, 不适合测量模型分析。对于单维测验, 给出了一个打包流程。对于通常的多个子量表(多维结构)测验, 推荐在子量表内打包, 每个子量表打包成1个指标或者3个指标, 用于结构方程建模。 相似文献
189.
Functional analysis of low‐rate aggression was conducted during extended observation periods and showed behavior to be maintained by positive reinforcement. Treatment consisted of variable‐momentary differential reinforcement of other behavior and was successful in reducing problem behavior throughout these extended observation periods. 相似文献
190.