Paleostriatal lesions and instrumental learning in the pigeon

In three experiments, pigeons with lesions of the paleostriatum (experimental subjects) and unoperated control birds were trained on tasks designed to assess their instrumental learning abilities. In Experiment 1, using an orthodox Skinner box, training was given on a variable interval (VI) followed by a fixed interval (FI) schedule of reinforcement and only non-significant differences between the groups emerged. Experiment 2 examined the performance of the same subjects on a VI schedule in which a response-contingent signal accompanied reinforcement. For control subjects the presence of the signal resulted in a low rate of response compared with that found in equivalent conditions with the signal omitted. Experimental subjects showed the same response rate when the signal was present as when it was absent. Experiment 3 employed naive subjects, and a Skinner box modified to facilitate key-pecking in total darkness. In this apparatus, experimental subjects showed a lowered response rate on a VI schedule. These tasks were analyzed in terms of the classical (stimulus-reinforcer) and instrumental (response-reinforcer) learning they involve. The results suggest that pigeons with paleostriatal lesions show a deficit in forming response-reinforcer associations, perhaps because the lesions reduce the salience of response-produced cues.     

Apparent reversal frequencies in squares and trapezia: the effect of invariant and variant information

Three studies of apparent reversals (ARs) in rotating rectangular and trapezoid arrays are reported, together with a mathematical analysis. Study 1 explores the effect of different degrees of outline suppression on the frequency and distribution of ARs in squares and trapezia. Study 2 examines how modifications in both types of array reduce AR frequency, demonstrates a manipulation whereby ARs in rotating squares are eliminated, and suggests that ARs in squares and trapezia are of different origins. In the mathematical analysis, an invariant characteristic of the transformations of rotating rectangles is reported, and from this a numerical index is developed that expresses the extent to which a rotating trapezium may appear to pause just before each point of oscillation. In study 3 it is shown that this measure is a better predictor of AR frequencies than the heuristic proposed by Braunstein.     

Judgements of a 2 × 2 contingency table: Sequential processing and the learning curve

Shanks (1985) has used a video game to investigate how subjects estimate the effect of their behaviour in a task defined by a 2×2 contingency table. The subjects were able to distinguish positive and negative contingencies from zero contingencies. In addition, they showed a learning curve and a bias to rate zero contingencies with a high outcome density higher than low-density zero contingencies. He interpreted these data as being consistent with associative models derived from animal learning. In Experiment 1 we replicated these results using a task and instructions similar to his. In a second experiment we showed that the subjects' tendency to overestimate high-density zero contingencies did not arise because the “game” was so difficult that it interfered with processing the events. In this experiment subjects were given tables of the outcome frequencies that had been determined by the earlier subjects. These subjects were, if anything, less accurate in rating the zero contingencies. We point out several logical problems with Shanks's initial task. The task did not represent a true 2×2 contingency, and aspects of it were physically impossible. In Experiment 3 we modified the task to represent a true 2×2 contingency. Using this task, we found a similar pattern of results, except that there was no evidence of the learning curve predicted by the associative models. We conclude that there is little in our data to rule out a “rule-based” analysis of contingency judgements.     

UN Convention on the Rights of the Child and Global Childhoods: Transdisciplinary Reflections from Nepal

Abstract

Globally, humans face innumerable socioeconomic, cultural, and environmental problems while being threatened by ever more interconnected and complex geopolitical concerns. In this planetary context, unidisciplinary research and related teaching approaches often work to constrain our ability to move beyond institutional and bureaucratic mind-sets to become agents of social change within local systems impacting children. During its 40-year evolution from a sub-discipline of psychology, the international field of child and youth studies has sought common ground for interpreting these pedagogical and professional issues. Many authors now argue for transdisciplinary approaches to address and overcome these tensions in the effort to re-integrate epistemologies of the global South within more dominant global North knowledge production systems. Such approaches have been posited to add new analytical and methodological tools to achieve praxis—the Greek word for translating theory into practice. Transdisciplinary research transcends the usual gap between academia and the broader public by acknowledging the value of knowledge obtained from diverse, nonacademic stakeholders in the community, government, and business. In addition, these approaches in child and youth studies offer us new possibilities for translating and understanding the local and global implications of implementing the 1989 United Nations Convention on the Rights of Child, and the vast differences in the experiences of childhood amongst and between various socioeconomic, cultural, and political contexts in recognizing their own rights in situ. Moving beyond adult-focused and Eurocentric understanding of the childhood literature (and of children’s human rights), this paper reflects our experiences working with young people affiliated with the Lalitpur Metropolitan City Child Clubs in Nepal, and observing their participatory planning processes for annual budgets. In response to increasing complexity throughout all regions of the world, we consider historical, political, and cultural experiences in Nepal through this transdisciplinary approach to child-centered research and activism. Our paper details key learning and transitions from being “academic researchers” and “observers” of a participatory, child- and youth-focused budgeting process to “collaborators” and “co-constructors of knowledge” with key stakeholders—the young people of Lalitpur, Nepal.     

Development or restoration of trust in interpersonal relationships during adolescence and beyond

Individuals low in interpersonal trust have been found to be less confident, less popular with others, and more lonely--all indicators of a need for attitudinal and behavioral change. A student who has reached a point of sufficient discomfort to seek therapeutic assistance can be aided in increasing trust in others through specific tasks cooperatively established by the counselor or other helping professional.