Concurrent variable‐interval variable‐ratio schedules in a dynamic choice environment

Most studies of operant choice have focused on presenting subjects with a fixed pair of schedules across many experimental sessions. Using these methods, studies of concurrent variable‐ interval variable‐ratio schedules helped to evaluate theories of choice. More recently, a growing literature has focused on dynamic choice behavior. Those dynamic choice studies have analyzed behavior on a number of different time scales using concurrent variable‐interval schedules. Following the dynamic choice approach, the present experiment examined performance on concurrent variable‐interval variable‐ratio schedules in a rapidly changing environment. Our objectives were to compare performance on concurrent variable‐interval variable‐ratio schedules with extant data on concurrent variable‐interval variable‐interval schedules using a dynamic choice procedure and to extend earlier work on concurrent variable‐interval variable‐ratio schedules. We analyzed performances at different time scales, finding strong similarities between concurrent variable‐interval variable‐interval and concurrent variable‐interval variable‐ ratio performance within dynamic choice procedures. Time‐based measures revealed almost identical performance in the two procedures compared with response‐based measures, supporting the view that choice is best understood as time allocation. Performance at the smaller time scale of visits accorded with the tendency seen in earlier research toward developing a pattern of strong preference for and long visits to the richer alternative paired with brief “samples” at the leaner alternative (“fix and sample”).     

Does Media Type Matter? The Role of Identification in Adolescent Girls�� Media Consumption and the Impact of Different Thin-Ideal Media on Body Image

Previous research on media exposure and body image focuses on TV and magazines, rather than the under researched types of media heavily consumed by adolescents, such as music videos. The present research, involving 199 adolescent girls (aged 14?C16) from South-East England, examines girls?? media consumption (types and genres) and identification with media models, then uses an exposure experiment to investigate whether the different media formats in which ??body perfect?? ideals are presented affects their impact on body image. ??Study 1?? showed that neither type nor amount of media use was related to body dissatisfaction, however media model identification was. ??Study 2?? demonstrated that regardless of media type, experimental exposure to the body perfect led to significantly higher body and appearance dissatisfaction, compared to control images, but primarily amongst those girls who strongly identified with media models. Theoretical and intervention implications are discussed.     

Family Functioning,Family Structure,and Differentiation of Self in Heterosexual Spanish Couples: An Actor–Partner Analysis

This study used an actor–partner interdependence model to assess the relationship between differentiation of self and family functioning in a sample of 118 heterosexual Spanish couples, with additional attention to family structural correlates, including age of the children, number of children in the household, and educational level. Results showed a significant actor effect, with greater differentiation of self levels predicting better family functioning within individuals. Implications for mental health professionals regarding differentiation are provided.     

Storywork in STEM-Art: Making,Materiality and Robotics within Everyday Acts of Indigenous Presence and Resurgence

Abstract

This article presents findings from TechTales, a participatory design research (PDR) project where learning scientists, public library staff members, informal science educators, and staff members from Native-American-serving organizations collaborated to design a family-based robotics workshop that was grounded in storytelling. We approach this by engaging Indigenous ways of knowing and being from a sociocultural learning theory perspective. Through analyzing families-in-interaction as they constructed dioramas with robotics that told their family stories, we explore how cultivating consequential learning environments in STEM is intimately intertwined with historicity, knowledge systems, and the agentic positioning of learners to design new technologies. We find that using storywork as the design focus of building dioramas created learning environments where computer programing and robotics became dynamic tools toward family-making, collaboration, and the active presencing of Indigenous knowledge systems and cultural practices. Living and interrelating with story and its knowledge systems through making were enactments of Indigenous resurgence in everyday ways. From a structure of social practices perspective, this opens up learning spaces for engagement in STEM-Art practices and in relation to other social practices of consequence, such as cultural flourishing and affiliation, collaboration and family-making, and societal repositioning.     

Specific- and partial-source memory: effects of aging

Normal aging can be associated with impairments in source memory (recollecting an event's context). This study examined the effects of aging on specific-source memory (e.g., remembering which of 4 people spoke a word) and partial-source memory (e.g., remembering the gender of the person who spoke the word). When young and older adults were matched in terms of old-new recognition, age-related deficits were observed on both specific- and partial-source recollection. When the groups were matched on partial-source performance, no disproportionate specific-source impairment was seen. The results suggest that aging does not differentially affect specific- versus partial-source memory.     

Soldiers at risk for individual readiness or morale problems during a six-month peacekeeping deployment to the Sinai

Longitudinal data were examined to predict soldiers' morale, satisfaction with Army life, and the effects of family issues on performance of duties during an overseas deployment (Sinai peacekeeping force during the spring of 1995). Few variables were significant predictors of the outcome measures; however, rank, leaders' support for families, prior satisfaction with Army life and with information released about the deployment appeared to predict better outcomes during the deployment. Rank and leaders' support for families appeared to be more important for married soldiers while satisfaction with predeployment information seemed to be more important for single soldiers. Those who were worried about the effects of the deployment on their families also tended to report interference with their duty performance because of family concerns, but that effect was offset by perceived leaders' concern for families. In conclusion, it appears to the authors that the pre-existing factors studied had much less to do with deployment outcomes than did leadership success before and during the deployment. That's good news for Army leaders about their power to have a positive effect on soldiers' morale during overseas deployments but may be bad news for anyone hoping to find a "magic bullet" for pre-identification of soldiers most likely to retain high morale, regardless of their leadership's competence during an overseas deployment.     

A Truly Early Starter Model of Antisocial Behavior Revisited

This paper revisits a developmental model of the origins of early conduct problems. Several of the model's primary tenets have now been validated in two samples of at-risk children followed prospectively from infancy to school-age. In both cohorts, child, family, and sociodemographic factors all play a significant role in the development of early conduct problems. In particular, the quality of the caregiving environment during the child's second year differentiates clinical impairment according to both parent and teacher report 6 years later. We conclude by making recommendations for future studies. Research that utilizes a developmental framework, incorporates more sophisticated measurement of infant negative emotionality, and addresses the influences of neighborhood and culture, is suggested.     

The social reality of the imaginary audience: a grounded theory approach

Traditional approaches to understanding the imaginary audience are challenged in this study. Three hundred sixty-one British schoolchildren (aged 14 and 15 years) were asked to express their worries and concerns, using grounded theory methodology. Qualitative responses were collated and coded according to emerging categories, with "what other people think" identified as the central concern. In particular, the findings are used to critique Elkind's (1967) theory of adolescent egocentrism. Data presented in this study suggest that adolescents worry about what other people think because there are real personal and social consequences. Such concerns are seen as being based in social reality and are not imaginary as Elkind suggested. In conclusion, new methodologies which place young people at the center of the analysis are advocated.