Variable-interval schedule performance in open and closed economies

In two experiments, pigeons obtained food according to variable-interval schedules. In the first experiment, equivalent variable-interval schedules with average interreinforcer intervals ranging between 10 and 80 s in different conditions were studied in both open and closed economies. Response rates increased as reinforcement frequency decreased in the closed economy. By contrast, in the open economy response rates decreased for 1 bird and were variable for the other as reinforcement frequency decreased. The second experiment showed that the differences in the functions between responding and reinforcement frequency in the two types of economies were not due to changes in deprivation level. These results suggest that open and closed economies yield different behavioral effects. This conclusion is supported further by a reconsideration of previous findings that appear counter to the conclusion.     

The economics of the law of effect.

A corollary of the law of effect predicts that the larger the reinforcement, the greater the rate of responding. However, an animal must eat more small portions than large portions to obtain the same daily intake, and one would predict, therefore, that when eating smaller portions an efficient animal would eat less (conserving time and energy) and/or respond faster (conserving time). The latter of these predictions was supported by the present experiments with free-feeding rats for which portion size (pellet size or duration of feeder presentation) and portion price within meals were varied. Response rate was a function of the unit price (responses/g) of food: Rats responded faster when portions were smaller or when prices were higher. Meal size and frequency were relatively unaffected by unit price, but were influenced by the price of meal initiation. The results are discussed in relation to the economic differences between traditional operant and free-feeding paradigms and to both traditional and more recent formulations of the law of effect.     

Responding on concurrent-chains schedules in open and closed economies.

Pigeons' key pecks were reinforced according to concurrent-chains schedules of reinforcement. The programmed average time from the onset of the initial links to a terminal link entry was held constant across conditions while the value of variable-interval schedules in the terminal links was varied. Performance was assessed under two economic conditions: (a) an open economy in which session duration was limited to 1 hr and subjects were maintained at 80% of their free-feeding body weights with postsession food when necessary; and (b) a closed economy in which sessions were 23.5 hr long and no deprivation regimen was in effect. In all cases, the relative rate of responding in the initial links matched the reduction in overall delay to primary reinforcement correlated with entry into one terminal link relative to the reduction in delay correlated with entry into the other terminal link. Although the sum of responses made in the initial links and terminal links was found to increase, then decrease, as the rate of food presentation decreased in the closed economy, there was no consistent effect of overall rate of food presentation on total responding in the open economy. The choice data suggest that relative delay reduction predicts choice accurately, regardless of economic context.     

Idolatry: A Reading Key for the Market Economy?

This article proposes that theology can and must have a significant role in understanding current economic‐social reality. Using examples that portray the frequent use of religious terms among executives, economists, and political and social analysts, it shows that the discourse of the market system assumes a dogmatic faith in the market and that the theological concept of idolatry can be very useful in unveiling the system's fascination and sacrificial character.     

Differentiation of self,religious coping,and subjective well-being

This study examined the relationships between differentiation of self (DoS), religious coping, and subjective well-being in a sample of undergraduate students at a religiously affiliated university. Intrapersonal DoS or the ability to (1) experience emotions, but (2) not be forced to respond to them is an important capacity for self-regulation with important implications for well-being and spiritual maturity. In this study, DoS was a potential method for understanding one’s emotional experience, and perhaps facilitated respondents’ use of a more collaborative religious coping style to manage this experience.     

Exploring the Theory and Paradigm Base for Wraparound

Until recently, family-centered policy and practice used expert models which defined families of children with serious emotional disturbance as dysfunctional A collaborative model, called wraparound, is emerging which engages these families as decision making participants, using naturally occurring strengths to wrap individualized supports around the child and family. However, because wraparound has been defined only through value-based principles, the fidelity of the model is threatened by a developmental paradox. Those who have received training and whose careers have been shaped in more traditional expert models of deficit remediation can interpret these value-based principles as an emergent form of case management methodology. Critical and constructivist paradigms, and ecological systems theory, form a basis for negotiating this paradox to maintain fidelity of wraparound process. Anchored in this base, and derived from wraparound's value-based principles, a single construct with an operative focus is suggested to ensure the integrity of this collaborative model.     

Content and formulation writing argumentative texts in Paris

The article propose a new way of looking at the relationship between content elaboration and formulation during the production of written argumentative texts. It is hypothesized, that younger students elaborate contents by formulating them, whereas in older students both processes are clearly distinguished. 8 pairs of students aged 10 and 14 and adults with academic background produce a text in a collaborative situation. Three aspects of the production of the first and the last sentence are analyzed in looking at the recorded dialogues: elaboration of argumentative plans; the independant elaboration of contents; the variation of linguistic forms. The results gives the hypothesis credit and show a deep reorganisation of the production process of argumentative texts in ontogenesis.     

USE OF A TOKEN ECONOMY TO INCREASE COMPLIANCE DURING HEMODIALYSIS

We report the effects of using a token economy to treat noncompliant behavior in a 10-year-old male hemodialysis patient. The results of an ABAB design indicated that the intervention increased compliant behavior during both treatment phases and that compliance was maintained at 3- and 6-month follow-up observations.     

Why be my colleague’s keeper? Moral justifications for peer review

Justifying ethical practices is no easy task. This paper considers moral justifications for peer review so as to persuade even the sceptical individualist. Two avenues provide a foundation for that justification: self-interest (the right behaviour is that which maximally serves one’s own interests) and social contract theory (the right behaviour is that which best meets obligations set in binding social contracts). A wider notion of “interest” permits the self-interest approach to justify not only submitting one’s own work to peer review but also removing oneself momentarily from the production of primary knowledge to serve as a rigorous, independent, and honest referee. The contract approach offers a non-selfish alternative and relies on four types of binding social contracts: those implicit in accepting funds, those implicit in asserted professional status, those to contribute what is of most value to society, and those to defend the ideals of the Academy. Efforts to restore respect for rigorous, independent, honest peer review should begin in earnest.     

THE EFFECT OF A TOKEN ECONOMY ON DIETARY COMPLIANCE FOR CHILDREN ON HEMODIALYSIS

Adherence to dietary restrictions is a recurring problem for children on hemodialysis. The effect of behavior modification in maintaining dietary control is reported for four patients aged 11 to 18 years. Weight gain, potassium level, and blood urea nitrogen were utilized as criteria measures. A token reinforcement program implemented by the hemodialysis team resulted in significant changes in the dietary pattern of the children. The average weight gain between dialysis sessions for the four subjects during treatment was reduced by 45% and the degree of weight fluctuation was lessened. Potassium levels and BUN were controlled to their appropriate level for subjects who initially exceeded the criterion level. With the withdrawal of weight gain from the contingency system, increase of weight gain between dialysis sessions was noted for all subjects.