Preweanling and adult rats treat conditioned light-tone combinations differently

Ontogenetic differences in processing light-tone compounds were discovered in preweanling (17-day-old) and adult (60–80-day-old) rats. Suppression of general activity was used as an index of the magnitude of conditioned fear following a single training session in which a CS+ was paired with mild footshock. In Experiment 1, rats were trained on discriminations in which the CS? consisted of a light and the CS+ was either a tone alone (simple discrimination) or a light-tone compound (simultaneous feature-positive discrimination). Adults and preweanlings given each type of discrimination were then tested for fear of the CS? and a target stimulus (tone alone or light-tone compound). Adults in all groups displayed greater fear of the target than of the CS?. Preweanlings, however, discriminated the CS? from the target only when the target was the same as the original CS+. Experiment 2 revealed that age-related differences in conventional stimulus generalization is not a likely explanation for the pattern of results found in Experiment 1. Experiment 3 revealed age-related differences in expressed fear of a serial feature-positive discrimination; adults, but not preweanlings, showed greater fear of the compound than of the CS?. Alternative interpretations of the results from these experiments are discussed, and the general conclusion is that adults appear more inclined to process elements of a compound stimulus selectively, whereas preweanlings seem more likely to process the compound unselectively, with roughly equivalent processing of each element.     

Zum Problem der Hochschulreform in Spanien: Einige Ausgewählte Daten

Over the past ten years there has been a sweeping reform of the courses taught and qualifications awarded by Spanish universities. For that reason, an investigation was launched in 1996–97 at the University of Santiago de Compostela (in Northwest Spain) into the teaching, research and management entailed in four new degree courses: physics (years one to four), agricultural engineering (first and second years), agricultural food-processing technology (years one to three) and pharmacy. This article reports on students' opinions of the reforms in these courses, revealing dissatisfaction with facilities for practical course work, lack of connection with prospective employment, and a call for more information about courses.     

Differential Influence of Same- and Cross-Ethnic Friends on Ethnic-Racial Identity Development in Early Adolescence

Recent research has shown that peers influence ethnic-racial identity (ERI) development during early adolescence. Arguments based on social identity theory, however, suggest that only same-ethnic but not cross-ethnic friends are important for ERI development. Using longitudinal social network analysis, we examined peer influence of both same- and cross-ethnic friends on ERI attachment and private regard. Data were drawn from six ethnically diverse schools in Western Germany (N = 1,349; M_age = 13.3). Our results provide empirical evidence for early adolescents’ ERI being influenced by same- but less by cross-ethnic friends. Considering peers’ ethnicity therefore is crucial for understanding peer influence on ERI development.     

Finding their way: How public library users wayfind

A multi-method case study research design, guided by Passini's conceptual framework of wayfinding, was employed to investigate library user wayfinding behavior within the entry area of a medium-sized public library facility. The case study research design included document review of the library's wayfinding information system; unobtrusive observation of library user wayfinding behavior; intensive interviews with library users to discuss their views on wayfinding in the library; and an expert review with library staff and a library wayfinding and signage expert to validate research findings. Overall, the study found library users' wayfinding behavior to be generally inconsistent over time, but that there are users who stick to predominant segments (those segments used heavily to connect two particular nodes, or stops). Those segments tend to be the straightest or most direct segments connecting two given nodes. Also, users appear to employ Passini's wayfinding styles more often than his wayfinding strategies, but additional research is needed that delves more deeply into these cognitive processes.     

The potential for scholarly online books: Views from the Columbia University Online Books Evaluation Project

The Columbia University Online Books Evaluation Project sought to understand both user reactions to online books in the scholarly world and the cost profiles of print and online books. Scholars appreciated the opportunity to use the online format to locate a book and to browse it. However, they sought a print copy for extended reading. Incremental costs of online books are small for publishers. Libraries’ life-cycle costs are lower for online books than for print books. Summerfield and Mandel were both members of the Columbia University Libraries staff during the time of this project. Summerfield was a Project Director and Coordinator of this Project and Mandel was Deputy University Librarian and Director of this Project.     

Uses of the Past in Refugee Documentaries in Sweden and Germany

Migration not only entangles people, cultures and societies but also histories and memories of diverse groups across national and cultural boundaries. The article focuses on mediated memory cultures of migration both theoretically and empirically. The first part discusses how cultural memories of migration in cross-medial flows of remediation can entangle ‘mnemonic imaginations’ of diverse groups within societies across time, cultures and media. In response to the conceptual framework of ‘entangled media histories’ this theoretical part explores entangled media histories of migration from the angle of memory studies. The second part of the article gives selected case studies. They reveal how media have historically mediated migratory memories and how they make use of this media history in contemporary productions. The examples are two Swedish documentary films of 2011 and 2015 and two German television documentaries of 2015 and 2016. With this theoretical and empirical approach the article shows how media actively contribute to debates about contemporary migration movements by the help of time-travelling migratory memory and media history.     

Devaluation of Pavlovian conditioning in the 10-day-old rat

This experiment established that for the infant rat, 10 days postpartum, a preference conditioned to an olfactory stimulus (conditioned stimulus) could be substantially-decreased-by subsequently lowering the value of the unconditioned stimulus (heat). This devaluation effect disappeared when a sufficiently long interval elapsed between the devaluation treatment and the test, despite maintained retention of the original conditioned preference over this same interval. This suggests that devaluation in infant rats does not permanently change the animal’s original representation of the unconditioned stimulus, but instead may replace it temporarily with a conflicting representation.