Response strength and temporal control in fixed-interval schedules

Pigeons responded in a two-component peak procedure in which the components differed in terms of reinforcement magnitude (Experiment 1), immediacy (Experiment 2), or probability (Experiment 3). The prediction of behavioral momentum theory that responding in the relatively richer component should be more resistant to change was tested by (1) presenting response-independent food in the intervals between components according to a variable-time (VT) schedule, (2) prefeeding, and (3) extinction. In all the experiments, peak location in baseline occurred earlier, relative to the schedule value in the richer component. Peak response rate was more resistant to change in the richer component during the VT and prefeeding tests, and change in peak rate was more sensitive to differential reinforcement than change in overall response rate. Changes in measures of performance on peak trials during the disruptor tests were partially consistent with predictions of the behavioral theory of timing. The results suggest that peak response rate provides a more sensitive index of resistance to change for fixed-interval schedules than does overall response rate and that reinforcement strengthens both peak responding and temporal control.     

Murky waters: thoughts on desire, utility, and the "sea of modem science"

Historians of science in modern China have tried to challenge misconceptions that late nineteenth- and early twentieth-century Chinese were slow to master science or, worse, that they missed the point of science altogether. In so doing, we have often put aside basic questions-like why Chinese were interested in modern science in the first place or how they found modern science useful for their own purposes-in order to demonstrate the quality and advancement of scientific work in China. But overlooking these underlying issues not only strengthens the myth of science as an obvious and inevitable step in development; it also limits the relevance of the Chinese case to the history of science more broadly. If, instead, the spread of science is reconceptualized as a problem of desire and utility, the Chinese example may suggest interesting new avenues for the study of cultural innovation across geographic and disciplinary frameworks.     

Untangling the Links among Athletic Involvement, Gender, Race, and Adolescent Academic Outcomes

Although previous research has established that high school sports participation may be associated with positive academic outcomes, the parameters of the relationship remain unclear. Using a longitudinal sample of nearly 600 Western New York adolescents, this study examined gender- and race-specific differences in the impact of two dimensions of adolescent athletic involvement ("jock" identity and athlete status) on changes in school grades and school misconduct over a two-year interval. Female and black adolescents who identified themselves as "jocks" reported lower grades than those who did not, whereas female athletes reported higher grades than female nonathletes. Jocks also reported significantly more misconduct (including skipping school, cutting classes, having someone from home called to the school for disciplinary purposes, and being sent to the principal's office) than nonjocks. Gender moderated the relationship between athlete status and school misconduct; athletic participation had a less salutary effect on misconduct for girls than for boys.     

Assessing the 21st Century After-School Program and the Educational Gains of LEP Participants: A Contextual Approach

This study examines math and English standardized test score progress of students who participated in the 21st century program across 2 years of involvement with a focus on the learning trajectories of limited English proficiency (LEP) students. We find that math and English scores are highly associated with the school and program type—even within a single school district. LEP participants are the furthest behind but have the highest gains compared to other participants. Results vary based on the type of outcome (math or reading), the type of activity (academic or enrichment), and the grade level (elementary or middle school).     

Is Social Media Too Social for Class? A Case Study of Twitter Use

This qualitative case study examined Twitter use by undergraduate and graduate students in three classes. Previous studies have shown that while some faculty use Twitter, few are incorporating it into classes despite many recommendations for such use. This study examined how students perceived Twitter as a classroom tool. As an optional activity, many started with Twitter but fewer continued through the semester. The study reports on content and counts of tweets as well as student self-reports on usage and interest. The researchers found students enjoyed being consumers of tweets but seldom retweeted or replied. Incorporating Twitter in courses will require careful consideration of scaffolding, modeling, privacy and course design. Questions remain as to whether the informal social focus of Twitter may overwhelm attempts to use it in more structured educational settings.     

“Hello,How May I Offend You Today?” NBC's Outsourced and the Discourse of Cultural Authenticity

Cultural authenticity is a fluid construct in an era in which globalization is celebrated and vilified. The author examines how cultural authenticity is discursively ascribed, legitimized, and negotiated among creators and viewers of the short-lived NBC series Outsourced within the overlapping contexts of globalization, outsourcing, and fake Indian accents. Findings indicate that authenticity materialized around country of origin, and the author explores whether cultural artifacts conformed to iconic signifiers. The implications are contextualized within Arjun Appadurai's globalization framework.