DISCRIMINATIVE CONTROL OF THERAPISTS' PERFORMANCE1

In order to examine therapists' discriminative responding to normal and idiosyncratic patient responses, naive subjects were presented with a simulated “patient” for treatment. The subjects were made to believe they were reinforcing normal verbalizations emitted by this patient In fact, they were listening to a tape on which normal and idiosyncratic verbalizations had been recorded. Different probabilities of normal and idiosyncratic “patient” verbalizations could be presented to the subjects by means of a digital programming unit. In one of a number of conditions, the subjects' accurate reinforcing responses were followed by an increased probability of the patient's normal verbalizations. Accurate reinforcing responses emitted by the subjects were brought under the control of normal and idiosyncratic patient responses, by use of contingent feedback, change in patient responding, and monetary reinforcers. When the patient's normal verbalizations increased in probability, so did the subjects' accurate reinforcing responses following the patient's normal verbalizations, and to a lesser degree, the subjects' inaccurate reinforcing responses following the patient's idiosyncratic verbalizations. When the patient's idiosyncratic verbalizations increased in probability, the subjects' accurate and inaccurate reinforcing responses decreased in probability. The clinical implications of these tendencies are discussed.     

The short-term storage as a buffer memory between long-term storage and the motor system: A simultaneous-processing model

It is assumed that in a free-recall task the short-term store serves as a memory buffer between the long-term store and a final motor stage of word production. Because of this the retrieval process in long-term store is not hindered by the final motor stage of word production since continued output from the long-term store queues in the buffer for motoric processing. Otherwise a time consuming communication between the two processes would be necessary. A stochastic model of this conceptualization is provided to predict the temporal course of free recall as well as a paradigm in which the contribution of the short-term store in free recall can be studied. The experimental results from this paradigm were used to test the model and to estimate short-term storage capacity on the basis of the time course of free recall. The model predictions were in good agreement with the data and the capacity estimate coincides well with estimates found by totally different methods reported in the literature.     

Organizational identification and “currencies of exchange”: integrating social identity and social exchange perspectives

We integrate social exchange and social identity perspectives to propose and test the prediction that depending on their level of organizational identification, people may reciprocate the received organizational support using different “currencies of exchange”—reducing turnover intentions or, instead, engaging in extra‐role behavior. Specifically, the relationship of perceived organizational support (POS) with turnover intentions is proposed to be stronger with lower identification, whereas POS is proposed to be more closely related to extra‐role behavior with higher organizational identification. These predictions were supported in a cross‐sectional survey of N = 1,000 employees of a financial services firm. These results speak to the added value of integrating the social exchange perspective with its roots in applied psychology and the social identity perspective with its roots in social psychology in understanding the employee‐organization relationship.     

How well do ratings of academic performance by mothers and their sons correspond to grades,achievement test scores,and teachers' ratings?

Accurate perceptions of their child's academic performance are pivotal for parents' encouragement of their child's academic efforts. In research studies, parents' reports of their child's academic achievement, as well as the child's own reports, are often used as a proxy for teachers' ratings or grades. However, are parents' reports or their child's reports accurate and unbiased? We investigated whether ratings of academic performance made by mothers and their sons corresponded more closely to final grades and achievement test scores than did similar ratings made by teachers for three large samples of boys. Mothers' ratings correlated with final grades as well or better than teachers' ratings but more poorly with achievement test scores than did teachers' ratings. The seventh-grade boys' ratings correlated more poorly with both final grades and achievement test scores than did teachers' or mothers' ratings. Across all three samples combined, mothers were more likely to over-estimate rather than under-estimate the final grade. The same was true of the seventh grade sample of boys. Once the effect of final grade had been controlled, little evidence of a consistent pattern of associations between maternal demographic, parenting, and child behavior variables and either over- or underestimation was found.     

The perception of limb orientation depends on the center of mass

Three experiments were conducted to test the hypothesis that the perception of limb orientation depends on inertial eigenvectors against the alternative that it depends on the center of mass. In all experiments, each participant pointed at visible targets with his or her occluded right arm while center-of-mass and inertial eigenvectors were manipulated independently. In Experiments 1 and 2, the arm was constrained to rotate exclusively about the shoulder, whereas in Experiment 3, the arm was allowed to rotate freely about both the shoulder and the elbow. The mechanical manipulations were applied either in the horizontal (Experiments 1 and 3) or vertical (Experiment 2) plane. Across experiments, pointing direction was affected by the center of mass and not by the inertial eigenvectors, albeit that simultaneous manipulation of both resulted in a more pronounced pointing bias than the isolated center-of-mass manipulation. These findings challenge the inertial eigenvector hypothesis and suggest that the center of mass plays a generic role in the perception of limb orientation.     

德国哲学对老子的接受——通往“重演”的知识

老子思想在德国哲学几百年的发展史中早已留下印迹,甚至在某些重要哲学家那里,比如谢林、M.布伯和海德格尔等,产生了呼应式的对话。这不得不让我们思考中西思想沟通中的"文化间性"(Interkultualitt)。本文作者艾尔伯菲特站在文化间哲学(interkultuelle Phi-losophie,又译比较哲学)的立场上,一一回顾并且精要点评了老子在几位主要德国思想家那里产生的影响,他对德国哲学自海德格尔以来的新动向的阐发,指出了一条相对清晰可辨的"重演"道路,表明德国哲学家如何运用外来思想革新自身传统,也即:他山之石,可以攻玉。     

Analysis of covariance structures

A general method is presented for estimating variance components when the experimental design has one random way of classification and a possibly unbalanced fixed classification. The procedure operates on a sample covariance matrix in which the fixed classes play the role of variables and the random classes correspond to observations. Cases are considered which assume (i) homogeneous and (ii) nonhomogeneous error variance, and (iii) arbitrary scale factors in the measurements and homogeneous error variance. The results include maximum-likelihood estimations of the variance components and scale factors, likelihood-ratio tests of the goodness-of-fit of the model assumed for the design, and large-sample variances and covariances of the estimates. Applications to mental test data are presented. In these applications the subjects constitute the random dimension of the design, and a classification of the mental tests according to objective features of format or content constitute the fixed dimensions.Preparation of this paper has been supported in part by NSF Grant GB-939 and U. S. P. H. Grant GM-1286-01. Computer time was donated by the Computation Center, University of Chicago.Now at the University of Chicago.Now at the University of Georgia.