Effects of d-amphetamine, cocaine, and phencyclidine on the acquisition of response sequences with and without stimulus fading.

In each of three components of a multiple schedule, monkeys were required to emit a different sequence of four responses in a predetermined order on four levers. Sequence completions produced food on a fixed-ratio schedule. Errors produced a brief timeout. One component of the multiple schedule was a repeated-acquisition task where the four-response sequence changed each session (learning). The second component of the multiple schedule was also a repeated-acquisition task, but acquisition was supported through the use of a stimulus-fading procedure (faded learning). In a third component of the multiple schedule, the sequence of responses remained the same from session to session (performance). At higher doses, d-amphetamine, cocaine, and phencyclidine decreased the overall rate of responding and increased the percent errors in all three components. At lower doses, however, the three drugs produced selective effects on errors. Errors were increased in the learning component at lower doses than those required to disrupt the behavior in the faded-learning component. The performance component tended to be the least sensitive to disruptive drug effects. The data are consistent with the view that stimulus fading can modulate the effects of drugs on acquisition.     

Psychometric evaluation of the situation test of heterosocial skill

This study examined various psychometric properties of Forms A and B of the Situation Test, developed by Rehm and Marston (Journal of Consulting and Clinical Psychology, 1968, 37, 565–574) for the assessment of heterosocial skill and anxiety. A third test form composed of heterosocially irrelevant items was also examined for comparison purposes. Split-half, alternate-form, and interresponse consistency was determined for measures of skill, anxiety, response latency, and response duration. Differences across test forms on these measures were also investigated. Subsequently, criterion-related validity was examined relative to three criteria of heterosocial skill. Results indicated that two measures, anxiety and response duration, displayed adequate internal consistency, while that of skill and response latency was marginal. Interresponse consistency was moderately low for all three test forms. Comparisons of mean performances across forms revealed significant differences, with heterosocially irrelevant items appearing easier, in general, than the heterosocial items of Forms A and B. Lastly, significant predictions of peer-reported heterosocial behavior were obtained for all three test forms, but two self-report criteria were not found to be related to test behavior. Various implications of these findings are discussed.Portions of this research were completed while the authors were affiliated with the University of Georgia, Athens, Georgia. The advice and consultation provided by the late William K. Boardman is gratefully acknowledged. Appreciation is also extended to Michael Breakwell, Linda Maertzweller, Steven Ray, and Jan Rockley for their assistance with data collection.Copies of assessment material and specific instructions to subjects are available upon request.     

Do early lexical skills predict language outcome at 3 years? A longitudinal study of French-speaking children

Early language development is considered critical for children’s adjustment in school, for social adaptation and for later educational achievement. Despite the role of children’s receptive skills as a foundation for later productive word use, receptive language skills have received surprisingly little attention. The present research extends recent work on the prediction of preschool language skills by exploring whether a decontextualized measure of lexical comprehension can account for unique variance in preschool language skills above and beyond parent report and how early such a prediction can be made. For this purpose, 65 French-speaking children have been tested at 16, 22, 29 and 36 months.The results of the current study suggest that up to the age of two, although parent reports of lexical comprehension and/or production account for a portion of variance in later receptive, productive or general language outcome, they have less predictive validity than a direct measure of early lexical comprehension. By contrast, after age two, parent reported vocabulary production is the strongest predictor of later language production skills.     

Acquiring variation in an artificial language: Children and adults are sensitive to socially conditioned linguistic variation

Languages exhibit sociolinguistic variation, such that adult native speakers condition the usage of linguistic variants on social context, gender, and ethnicity, among other cues. While the existence of this kind of socially conditioned variation is well-established, less is known about how it is acquired. Studies of naturalistic language use by children provide various examples where children’s production of sociolinguistic variants appears to be conditioned on similar factors to adults’ production, but it is difficult to determine whether this reflects knowledge of sociolinguistic conditioning or systematic differences in the input to children from different social groups. Furthermore, artificial language learning experiments have shown that children have a tendency to eliminate variation, a process which could potentially work against their acquisition of sociolinguistic variation. The current study used a semi-artificial language learning paradigm to investigate learning of the sociolinguistic cue of speaker identity in 6-year-olds and adults. Participants were trained and tested on an artificial language where nouns were obligatorily followed by one of two meaningless particles and were produced by one of two speakers (one male, one female). Particle usage was conditioned deterministically on speaker identity (Experiment 1), probabilistically (Experiment 2), or not at all (Experiment 3). Participants were given tests of production and comprehension. In Experiments 1 and 2, both children and adults successfully acquired the speaker identity cue, although the effect was stronger for adults and in Experiment 1. In addition, in all three experiments, there was evidence of regularization in participants’ productions, although the type of regularization differed with age: children showed regularization by boosting the frequency of one particle at the expense of the other, while adults regularized by conditioning particle usage on lexical items. Overall, results demonstrate that children and adults are sensitive to speaker identity cues, an ability which is fundamental to tracking sociolinguistic variation, and that children’s well-established tendency to regularize does not prevent them from learning sociolinguistically conditioned variation.     

幼儿的游戏行为及其与社会技能、学习行为的典型相关分析

对4～6岁儿童的游戏行为、社会技能和学习行为进行问卷调查.结果发现,幼儿的游戏行为发展存在显著的年龄和性别差异.典型相关分析结果表明,游戏行为对幼儿社会技能的影响作用大于社会技能对游戏行为的影响作用,同时,游戏中的亲社会行为对幼儿的学习能力、学习动机有显著的促进作用,而破坏、退缩行为对学习能力和学习动机的形成有阻碍作用.     

The Relationship between Workplace Incivility and Helping Behavior: Roles of Job Dissatisfaction and Political Skill

This article investigates the mediating role of job dissatisfaction in the relationship between employees’ perceptions of workplace incivility and their helping behavior, as well as the buffering role of political skill in this process. Three-wave, time-lagged data collected from employees and their supervisors revealed that employees’ exposure to workplace incivility diminished their helping behavior through their sense of job dissatisfaction. This mediating role of job dissatisfaction was less salient, however, to the extent that employees were equipped with political skill. For organizations, this study accordingly pinpoints a key mechanism—namely, unhappiness about their job situation—through which rude coworker treatment links to lower voluntary workplace behaviors among employees, and it reveals how this mechanism can be better contained in the presence of political skill.     

与领导关系好就能获得职业成功吗？一项调节的中介效应研究

采用结构化问卷, 在2个时点进行2轮问卷调查, 共收集到206份问卷。根据Edwards和Lambert (2007)推荐的程序, 检验了领导-部属交换与下属职业成功间的调节的中介效应模型。结果表明：(1)网络能力、人际影响、社会机敏性、外显真诚4种政治技能调节了领导-部属交换对下属职业成功的直接效应和总效应; (2)在上述4种政治技能的调节下, 心理授权在领导-部属交换与下属职业成功之间起着部分中介作用或完全中介作用; (3)人际影响调节了领导-部属交换对下属心理授权的作用, 外显真诚调节了心理授权对职业成功的作用。     

基于服务场景的中国医务社工角色探讨

明确定义中国医务社工的角色内涵与工作职责十分必要。基于入院前、急诊、门诊、住院、出院与安宁疗护六个不同医疗服务场景,仔细梳理并描述医务社工的角色与职责,体现医务社工的角色价值,推动社会、患者及其家属、医生与护士,乃至医务社工自身对该职业的理解与认同。此外,对应不同场景下医务社工的角色与职责,提出该群体需具备的知识与技能,并就如何确保此类知识与技能被中国医务社工牢固掌握提出有关教育与培训的建议。     

Acquisition and maintenance of autoshaped key pecking as a function of food stimulus and key stimulus similarity.

The results of a number of recent studies suggest that acquisitions of autoshaped key pecking in pigeons is affected by the similarity of the grain-hopper stimulus and response-key stimulus. In Experiment 1 this hypothesis was tested by training independent groups of pigeons to key peck under six different hopper-stimulus and key-stimulus similarity conditions, and three procedures containing either immediate reinforcement, variable delay of reinforcement, or omission of reinforcement for key pecking. Number of trials to acquisition was found to be related to the similarity variable. Maintained responding was affected by the response-reinforcer contingency. This effect was found both within and between subjects. Under two of the contingencies (automaintenance and omission), maintained responding continued to be affected by the similarity of the hopper stimulus and key stimulus. In Experiment 2 pigeons were given omission training with a hopper light on or off. Both acquisition and maintenance of key pecking were facilitated by the presence of the hopper light. The present findings suggest that much of the responding reported in various automatic shaping and training procedures may reflect the effects of key stimulus/food stimulus similarity.