Social facilitation of pecking and drinking in “satiated” chickens

Pecking in chickens is a ubiquitous response that does not appear to be exclusively linked to any single motivational state. Because of this, certain earlier findings are ambiguous regarding the extent to which socially mediated pecking in chickens extends to theories of social facilitation effects. In the current research, drinking was identified as a possible alternative response for the study of socially mediated consummatory behavior in chickens. Tests of satiated subjects paired with deprived companions (or tested alone) showed that the pattern and relative amount of the social facilitation of drinking conformed exactly to the pattern for pecking. Therefore, it was concluded that socially enhanced consummatory behavior in the chicken can bear on theories of social facilitation.     

Retardation and facilitation of matching acquisition by differential outcomes

Pigeons were trained on many-to-one matching-to-sample with food and no-food outcomes that were either differential or nondifferential with respect to the sample stimuli. In the differential condition, outcomes were correlated with the correct comparison-alternatives-for half of the subjects, and were uncorrelated with those alternatives for the remaining subjects. Relative to non-differential training, matching acquisition was facilitated in the correlated condition but retarded in the uncorrelated condition. These results clearly demonstrate that differential outcomes do not affect conditional discrimination learning merely by enhancing the discriminability or distinctiveness of the samples with which they are associated. Rather, they apparently give rise to another discriminative cue (viz., an outcome expectancy), which can either enhance or interfere with performance, depending on its predictive validity.     

Social facilitation of drinking of a partially satiated duckling

Water-deprived and nondeprived ducklings were reintroduced to a flock companion which had been allowed to partially satiate itself after 3 h of water deprivation. The drinking and sieving behavior of the partially satiated “reactor” bird was immediately increased above that of similar birds left on their own. However, whether or not the introduced “actor” ducklings were deprived had no consequences for the drinking response of the reactor above that obtained by their introduction. The number of companions introduced also failed to have any effect other than that obtained by their introduction. The increase in sieving was greater when deprived, rather than nondeprived, actors were introduced. These results were discussed in relation to the motivational aspects of sieving behavior and the mechanism of social facilitation.     

Passive avoidance in chicks as a function of differential rearing

Chickens were tested, following either communal or isolation rearing, on a passive avoidance task at ages ranging from 12 h to 5 days. Performance was poorer after isolation primarily due to lack of improvement in this group with increased test age. These results confirmed the influence of experience in the development of the maturation-dependent processes underlying passive avoidance. The possible nature of such processes was discussed, and an extension of the generally proposed model based on inhibitory control development was outlined, excessive arousal or stress being implicated in the emergence of such inhibition. The importance of such an analysis for more precise testing of the inhibitory model as previously proposed, and specific predictions from this interpretation based on present results, were discussed.     

Required pecking and refraining from pecking alter judgments of time by pigeons

There is evidence that humans' perception of time is affected by the activity in which they are engaged while they are timing. The more demanding the task, the faster time appears to pass. A similar effect has been found in pigeons. Pigeons trained to discriminate between a short-duration (2-sec) and a long-duration (10-sec) stimulus were required to peck when the stimulus was one color and to refrain from pecking when it was a different color. On probe trials of intermediate durations, the bisection point (50% choice of the stimulus associated with both long and short stimuli) for trials in which the pigeons were required to peck was almost 1 sec longer than on trials in which the pigeons were required to refrain from pecking (Zentall, Friedrich, & Clement, 2006). In the present research, we replicated this effect and determined the relation between this effect and the typical bisection point that occurs when pecking is permitted but not required. Results indicated that the typical procedure results in a bisection point that is between required pecking and refraining from pecking. Furthermore, the rate of pecking when pecking is allowed but not required also falls between the rate of pecking for the required-pecking and refrain-from-pecking conditions. This result suggests that, similar to humans, pigeons underestimate the passage of time when they are active or when attention to time-related cues has to be shared with attention to satisfying the response requirement.     

Transfer of performance to new comparison choices following differential outcome matching-to-sample

Four experiments examined transfer of differential outcome performances to new choice responses in pigeons. Experiments 1A and 1B showed that new responses trained off a matching-to-sample baseline readily substituted for the choice alternatives in differential outcome matching, provided that they shared the same outcome associations as the alternatives they replaced. Experiment 2 showed that comparison responses trained on baseline, but in a task in which their different outcomes occurred equally often following each sample (viz., one-to-many matching), substituted for the choices in a standard, differential outcome task. Experiment 3 showed, somewhat surprisingly, that the choices in the latter task were likewise effective substitutes in one-to-many matching. These results pose separate challenges for standard two-process theory and for the bidirectional account of differential outcome performance, and they suggest other cues that pigeons may use to predict outcomes.     

Effect of a conspecific’s presence on deprived rats’ Performance: Social facilitation vs distraction/imitation

The present study investigated effects of (a) conspecific’s “mere presence” and (b) water deprivation on emission of dominant responses by rats. Zajonc (1965) suggests that a conspecific’s presence functions like a physiologically based drive in enhancing performance of dominant responses. Alternative interpretations suggest that a conspecific’s presence impairs performance by distracting the observer or eliciting imitation of “irrelevant” responses. The social facilitation vs distraction/imitation hypotheses were tested in a 2 by 2 design: Barpress-trained rats, deprived of water for 4 or 23 h, barpressed for water in the presence of a naive rat or alone. Results supported social facilitation theory: Performance was significantly higher when the conspecific was present rather than absent and when the responder was 23 h rather than 4 h deprived. In reconciling these data with conflicting results, it was suggested that degree of contact may be important in determining how a conspecific’s presence affects performance of dominant responses.     

Transfer of facilitation in the rat

In two experiments, rats solved two concurrent discrimination problems in which one stimulus (i.e., a facilitator) signaled the reinforcement of another stimulus (i.e., a target). Then a transfer test assessed the capacity of facilitators trained in one problem to promote responding to targets trained in the other. Experiment 1 found that a facilitator promoted as much responding to such a transfer target as to the target with which it was originally trained. Transfer was not obtained with a pseudofacilitator that was uninformative, in training, about the reinforcement of its target. Experiment 2 manipulated the stimulus modality of the targets and facilitators. Its results indicated that transfer performance was not due to generalization between training and transfer targets or facilitators. These results parallel those from comparable autoshaping paradigms with pigeons, and they agree with the view that facilitators promote responding by lowering the threshold for activation of the US representation.     

Social persistence following failure in boys and girls with LD

The response of boys and girls with or without learning disabilities to social failure was examined. Children participated in two dyadic interactions with experimental confederates: an unfriendly interaction and a friendly one. The children's behavior was videotaped, and they answered questions following each interaction. The children with learning disabilities were found to be hyperresponsive to both interactions: They felt significantly worse following the unfriendly one and significantly better following the friendly interaction. Limited evidence was found to suggest that girls with learning disabilities were more adversely affected by the unfriendly interaction. Several of the findings were consistent with the hypothesis that children with learning disabilities show a learned helplessness response to social failure. The implications of these findings for understanding the social behavior of children with learning disabilities are discussed.     

Modification of chicks’ pecking preferences: Food imprinting or instrumental conditioning?

Using Hess’ technique, 35 small groups of chicks of age 2–3 days or beyond were reinforced in training with food for pecking at one visual stimulus (S+) and nonreinforced for pecking at another (S?) and subsequently tested in extinction. In training, pecking was strongly conditioned to S+, but in testing, both number of pecks to and preference for S+ declined as in instrumental conditioning, contrary to Hess’ original report. Results are discussed relative to studies exposing chicks to actual food objects, where an imprinting-like phenomenon has been found.     

Family rearing antecedents of pubertal timing

Two general evolutionary hypotheses were tested on 756 White children (397 girls) studied longitudinally: (1) rearing experiences would predict pubertal timing; and (2) children would prove differentially susceptible to rearing. Analysis of pubertal measurements, including some based on repeated physical assessments, showed that mothering and fathering, earlier and later in childhood, predicted pubertal development, but only for girls, with negative parenting appearing most influential; maternal harsh control predicted earlier menarche. Rearing effects varied by infant negative emotionality, proving stronger (and opposite) for girls who in infancy were lower rather than higher in negativity. Maternal menarche, controlled in all analyses, was a stronger predictor than rearing. Findings are discussed in terms of theory development, genetic and nutritional influences, and sample restrictions.     

The facilitation of selective attention in preschoolers

Allocation of attention was examined on a selective attention task in which some items were relevant (i.e., their locations should be remembered) and some were irrelevant. 100 4- and 5-year-olds formed 4 experimental conditions and 1 control group. 3 experimental groups had 1 added feature to aid selectivity (fewer stimuli, increased perceptual salience of the difference between relevant and irrelevant stimuli, or extra reminders of the locations of relevant and irrelevant stimuli). The fourth experimental condition included all features. A story and explicit instructions identified which objects were relevant. During study times, children opened doors (marked with cages or houses) of a box to reveal animals or household objects. Selectivity (opening mainly relevant doors) was high, compared to previous studies using no story with 6-year-olds, even in the control condition. Selectivity increased significantly beyond the level in the control condition only when all facilitative features were combined. Selectivity was not significantly related to recall. This outcome, in conjunction with previous research, suggests a lag between the production of a strategy and its facilitative effect on recall.     

Reconceptualizing the pedagogical value of student facilitation

Sustained discourse is critical to the learning potential of online courses. And, while research has surfaced many factors that mediate interaction, it further suggests that sustained interaction remains elusive. In this paper, I propose that student facilitation may have an impact on the quality of facilitators' interactions following a week of moderating a course discussion. Through a survey of students in two post-secondary online courses, the results suggest that moderation fosters understanding of online learning processes and enhances interaction with others and content. I therefore suggest that moderation acts to inculcate students into the social fabric of an online course, prior to which their role and performance is ill-defined.     

中学生人际交往中的情感教育--一项调查引起的思考

一、中学生的情感饥渴人际交往是健康的心理得以维持和发展的必要途径 ,也是当代中学生最感困惑的三大问题之一。有些中学生由于不能处理好与同学之间的关系 ,使其原本认同于同辈群体的心理不能找到认同的对象而感到孤独、失落 ,严重地影响了他们身心的健康发展。人际交往的根本在于满足人的需要。研究中学生人际交往中的需要问题能使我们理解中学生的交往行为 ,更好地帮助他们处理人际关系 ,这对促进他们身心健康发展是极其有利的。为此 ,我们对初、高中学生人际交往动机进行了开放性问卷调查。结果见表 1:表 1　中学生人际交往需要的类型…     

Leader noticing of facilitation in videocases of mathematics professional development

In this article, we report on Researching Mathematics Leader Learning (RMLL), a project designed to support leaders in learning how to facilitate robust opportunities for teachers’ mathematical learning. Our two-phase research design allowed us to construct a set of videocase seminars, enact the seminar design with leaders, analyze these data, refine our seminar design, and implement a second set of seminars with a new group of leaders. We drew on the noticing literature to examine leaders’ pedagogical reasoning as they discussed videocases of professional development. In this article, we demonstrate how changes in our framework for leader development and the resulting changes in the prompts and tasks shaped leader noticing in three ways: (a) accounting for the mathematical work of the facilitator and teachers in the videocase; (b) linking the mathematical work to goals for teacher learning; and (c) reasoning around the facilitator’s work in advancing those learning goals. Analysis indicates that in Phase II, leader discussions were more focused on the mathematical and pedagogical work needed to advance teacher learning. Based on our research and development work with over 70 leaders, we offer a set of design principles for leader professional development.