The present study examined whether in humans the generalized matching law described the relation between relative responding and relative drug intake by humans under concurrent variable interval variable interval (conc VI VI) schedules of drug reinforcement. Methadone-maintained patients, stabilized on 80 mg per day of methadone, were recruited…

Binge drinking and alcohol-related problems among students at traditional 4-year universities have been well documented. However, little is known about the frequency of their such behaviors and its consequences among community college students, who comprise roughly 44% of all undergraduate students in the United States. The present study examined…

South African pupils performed well below the TIMSS international average in 1995 and 1999 and significantly below all other countries (including the other African countries) in the 1999 study. Path analysis, namely Partial Least Square (PLS) analysis, was applied to the South African TIMSS-R data to explore the effect of contextual factors at…

This longitudinal study examined the relations between multiple risk indexes representing contextual adversity, income-to-needs ratios, and the elementary school adjustment of children from economically disadvantaged families. The results provide evidence for volatility in family circumstances over 2-year intervals from preschool to 5th grade, for…

Does persistent adversity over time have effects on children's behavior beyond the effects of intermittent or concurrent adversity? This study examined the relations between school behavior in 5th grade (mean age = 11 years 0 months) and indexes representing persistent poverty and contextual risk. The indexes described 2-year intervals of family…

The use of racial variables in genetic studies has become a matter of intense public debate, with implications for research design and translation into practice. Using research on smoking as a springboard, the authors examine the history of racial categories, current research practices, and arguments for and against using race variables in genetic…

Recognizing the importance future aspirations play in the developmental outcomes of adolescents, this study illuminates the role that individual and contextual factors play in the formation of future aspirations among urban youth. The data for this study were collected prior to the implementation of an intervention program at an urban high school.…

The paper reports findings from research into the extent to which an on-line course, "Try Science", achieved its objectives compared with a face-to-face course with the same content and objectives. "Try Science" has the dual aims of developing participants' understanding of science content and of teaching science through enquiry. Whilst the…

The goal of this study was to investigate differences in the social context of peer victimization for preschoolers and kindergarteners. Data were collected from 168 children. For preschoolers, neither social acceptance nor friendships were significantly related to peer victimization. Instead, playing with peers and exposure to aggressive peers…

The present study examines the antecedents of burnout and job satisfaction among counselors employed in workplace settings. Workplace counselors face the unique demands of managing dual client relationships (individual and organization) within the counseling setting. Antecedents of the job-related outcomes of burnout and satisfaction are likely to…

This article aims to contribute to an understanding of principalship in Hong Kong through probing the formation and preservation of the deep leadership structures that shape its practice. Deep structures are formed partly through a dynamic relationship between constitution and culture which forms bounded "codes" of understanding, conduct…

This article explores young women's strategies for seeking personal power and resisting gender-based stereotypes in a wealthy, suburban, White community and a working-class, urban, community of color. Semi-structured interviews with 27 young women were used to examine contextual variations in these gender identity negotiation processes. Both…

This paper addresses Lawson's puzzlement about the absence of prediction in William Harvey's and Marcello Malpighi's views on capillaries. In addressing the context of that enquiry, it also addresses historiographic versus philosophical models of science, contexts of discovery versus justification, normative versus descriptive interpretations of…

During the last decades, traditional learning environments have been criticised for not developing the prerequisites for professional expertise (H. Mandl, H. Gruber & A. Renkl, "Interactive minds: Life-span perspectives on the social foundation of cognition," pp. 394-412, Cambridge, UK: Cambridge University Press, 1996; P. Tynjala, "International…

Creating archival descriptions in a digital environment and communicating across the Internet is not the same as traditional paper-based communication. As in other cultural domains, in archival description the medium influences the structure and content of information. The SIASFI Project and the Online Guide to the State Archives of Florence are…