拥有关系信息情境模型建构的影响因素

该研究修正了Radvansky1997年的实验设计 ,运用扇效应技术系统地探讨影响建构拥有关系情境模型的因素。共包括 4个实验 ,被试为 180名一年级本科生 ,研究材料是“1人 /多物”与“多人 / 1物”两类表示拥有关系的句型 ,每类句型都有 3种扇水平 ,用计算机逐个呈现句子 ,要求被试迅速再认作出按键反应 ,用MANOVA分析了被试对不同扇水平的两类句型的反应时。实验 1在中文条件下重复了Radvansky1997年的实验 ;实验 2探讨在明确的相同空间条件下 ,对“多人买 1物”拥有行为句式的整合是否表现出扇效应 ;实验 3探讨在信息采用顺向展开的情况下 ,“多人买 1物”拥有行为句式的整合是否表现出扇效应 ;实验 4进一步探讨在具有相同时空状语的条件下 ,“1人有多物”与“多人有 1物”两类拥有状态句式的整合是否表现出扇效应。结果表明 ,当具有明确的时空信息情况下 ,或者当信息顺向展开的情况下 ,“多人买 1物”的拥有行为句式的整合均没有表现出扇效应 ;而在有相同时空状语情况下 ,“1人有多物”的拥有状态句式的整合也没有表现出扇效应 ;说明这些句式可以整合为同一情境模型 ,与Radvansky的研究结果不同。研究结果初步表明 ,享有共同概念的若干事件信息是否整合为同一个情境模型 ,受到动词的动作性程度、是否有相     

Early impact of the BEST intervention for parents stressed by adolescent substance abuse

Youth involvement in substance abuse can be a source of considerable distress for their parents. Unilateral family interventions have been advocated as one means by which concerned family members can be supported to assist substance‐abusing family members. To date there has been little research examining the impact of unilateral family interventions on the directly participating family members. In this study the early impact of an 8‐week parent‐group programme known as Behavioural Exchange Systems Training (BEST) was evaluated using a quasi‐experimental, waiting list control design. The professionally led programme had been developed to support and assist parents in their efforts to cope with adolescent substance abuse. Subjects were 66 parents (48 families) accepted for entry into the programme between 1997 and 1998. Comparison was made between 46 parents offered immediate entry into the programme and 20 parents whose entry to the programme was delayed by an 8‐week waiting list. At the first assessment 87% of parents showed elevated mental health symptoms on the General Health Questionnaire. Evidence suggested exposure to the intervention had a positive impact on parents. Compared to parents on the waiting list, parents entered immediately into the intervention demonstrated greater reductions in mental health symptoms, increased parental satisfaction, and increased use of assertive parenting behaviours. Copyright © 2001 John Wiley & Sons, Ltd.     

Behavioral contrast: Pavlovian effects and anticipatory contrast.

Two sources of behavioral contrast have been identified previously: Pavlovian stimulus-reinforcer relations and component sequence effects (anticipatory contrast). This study sought to isolate these sources of control procedurally in a four-ply multiple schedule composed of two fixed two-component sequences. Different cues were associated with the first component of each sequence, and contrast effects were studied in these target components. In Experiment 1, differential cuing of Component 2 between sequences and availability of reinforcement during target components were varied across three groups of pigeons; the stimulus-reinforcer relation between target-component cues and schedule of reinforcement in Component 2 was varied within subjects. Control by the Pavlovian relation was demonstrated under all conditions, and anticipatory contrast was not observed. In Experiment 2, target-component duration was systematically varied in the three groups of Experiment 1. Control by the Pavlovian relation was reliably obtained only when target-component behavior was unreinforced, and diminished with increases in component duration. Anticipatory contrast emerged in the two groups for which target-component reinforcement was available. These and other data indicate that Pavlovian effects in multiple schedules may be obscured when the requisite conditions for anticipatory contrast are present.     

Resurgence of derived stimulus relations.

Resurgence has been shown in human and nonhuman operant behavior, but not in derived relational responses. The present study examined this issue. Twenty-three undergraduates were trained to make conditional discriminations in a three-choice matching-to-sample paradigm. The training resulted in three equivalence classes, each consisting of four arbitrarily configured visual stimuli. The same 12 stimuli were then reorganized, and the conditional discrimination training was repeated such that three new classes were possible. In a subsequent test of derived relations, most subjects showed response patterns that were consistent with the altered conditional discriminations. Subjects were then exposed to conditional discrimination trials under extinction. Most subjects continued to respond consistently with the most recently reinforced conditional discrimination trials. During the next phase, subjects were exposed to symmetry and equivalence trials. Responses consistent with the most recent training produced feedback saying that the responses were incorrect, whereas other responses produced no feedback. Most subjects showed a resurgence of responding that was consistent with their earlier training. Finally, subjects were exposed to conditional discrimination trials carried out in extinction. Most subjects continued to show a resurgence of responding that was consistent with their early training.     

Speed analyses of stimulus equivalence.

The functional substitutability of stimuli in equivalence classes was examined through analyses of the speed of college students'' accurate responding. After training subjects to respond to 18 conditional relations, subjects'' accuracy and speed of accurate responding were compared across trial types (baseline, symmetry, transitivity, and combined transitivity and symmetry) and nodal distance (one- through five-node transitive and combined transitive and symmetric relations). Differences in accuracy across nodal distance and trial type were significant only on the first tests of equivalence, whereas differences in speed were significant even after extended testing. Response speed was inversely related to the number of nodes on which the tested relations were based. Significant differences in response speed were also found across trial types, except between transitivity and combined trials. To determine the generality of these comparisons, three groups of subjects were included: An instructed group was given an instruction that specified the interchangeability of stimuli related through training; a queried group was queried about the basis for test-trial responding: and a standard group was neither instructed nor queried. There were no significant differences among groups. These results suggest the use of response speed and response accuracy to measure the strength of matching relations.     

Valuational semantics of rule derivability

If a certain semantic relation (which we call local consequence) is allowed to guide expectations about which rules are derivable from other rules, these expectations will not always be fulfilled, as we illustrate. An alternative semantic criterion (based on a relation we call global consequence), suggested by work of J.W. Garson, turns out to provide a much better — indeed a perfectly accurate — guide to derivability.     

Destructive and reparative transference in multiple levels of group psychotherapy

Group members are challenged to form psychologically meaningful relationships with therapists, other members, and the group as a whole. The way in which individuals perceive this challenge is based on their past experiences. Early relationships establish a perceptual frame in which fears of being hurt and concern about hurting others coexist. Balance between these two ways of generating meaning enables individuals to form relatively healthy relationships. Imbalance in this perceptual frame results in distorted perceptions and maladaptive patterns emerging as transference manifestations. Working through involves repeatedly addressing distortions as members relate to therapists, others and the group as a whole.     

Trust and Missed Opportunities in International Relations

With the end of the Cold War, we must wonder whether there were missed opportunities to regulate the arms race and global competition, which nearly bankrupted the United States and contributed to the collapse of the Soviet Union. A missed opportunity for agreement is a situation where there was at least one alternative that the parties to a conflict preferred or would have preferred to nonagreement. Hard-core Realists argue that states compete for territory, arms, and influence because they have conflicting national interests. Soft-core Realists maintain that such conflicts are effects of international anarchy and uncertainty, and that states can cooperate contingent on reciprocity. I argue that states often fail to cooperate even when they have compatible preferences because policy-makers make incorrect inferences about the opponent's motives and intentions, a process that can be illuminated by social psychology. I present three alternative explanations of trust and distrust in international relations—rational choice, domestic structures, and social psychology. If policy-makers are prudent, they will assess the other's interests in observing an agreement as well as its reputation. Often, domestic political structures encourage leaders to promote distrust of an external enemy to legitimize their internal rule or foreign policy. Finally, distrust may lead policy-makers to dismiss the other side's cooperative signals or proposals. Distrust can be overcome by making a series of step-by-step agreements in which each side can test the other's good faith at limited cost, or through unilateral concessions as part of a consistent policy.     

The effects of nodality on the formation of equivalence classes

A four-member equivalence class (A → B → C → D) can be formed by training AB, BC, and CD. The nodal stimuli, B and C, mediate all of the derivative (transitive and equivalence) relations in the class. The derivative relations AC, CA, BD, and DB are separated by one node, whereas AD and DA are separated by two nodes. How do the number of nodes that separate the stimuli in a derivative relation influence the induction of stimulus control exerted by that relation? Seven college students learned two four-member classes made up of nonsense syllables. After training, all derivative relations were presented repeatedly without informative feedback. Stimulus control exerted by each derivative relation was assessed concurrently. For the 7 subjects, control exerted by the derivative relations increased gradually with repeated presentations. With 6 of the 7 subjects, the one-node relations exerted more control than the two-node relations during the process. However, the disparity between the one- and two-node relations decreased with repeated presentations. Eventually, all derivative relations exerted complete control. The control exerted by derivative relations during induction was inversely related to the number of nodes separating the terms in the derivative relations. These results demonstrate that nodal distance is a determinant of the relatedness of stimuli in equivalence classes. The findings are discussed in terms of remote association, semantic memory networks, and the study of transitive inference.     

Interpersonal contingencies: Performance differences and cost-effectiveness

Three reinforcement contingencies were compared with regard to performance differences and cost-effectiveness (i.e., responses per unit reinforcer). Pairs of college students were studied under individual, cooperative, or competitive contingencies using a concurrent setting that included one of these three contingencies as one alternative and a lower paying individual contingency as the other alternative. With the individual and the cooperative contingencies, overall response rates were typically high; under competitive contingencies the overall response rates were substantially lower. Subjects responded at very high rates when competing, but chose not to compete most of the time. Competition and cooperation produced the most cost-effective responding, assessed as the number of responses made per $.01 of reinforcer. High overall rates of competitive responding were obtained when the contests were longer and the lower paying alternative contingency was not available.