The memory of science: Inflation,myopia, and the knowledge network     

Raj K. Pan  Alexander M. Petersen  Fabio Pammolli  Santo Fortunato 《Journal of Informetrics》2018,12(3):656-678

Scientific production is steadily growing, exhibiting 4% annual growth in publications and 1.8% annual growth in the number of references per publication, together producing a 12-year doubling period in the total supply of references, i.e. links in the science citation network. This growth has far-reaching implications for how academic knowledge is connected, accessed and evaluated. Against this background, we analyzed a citation network comprised of 837 million references produced by 32.6 million publications over the period 1965–2012, allowing for a detailed analysis of the ‘attention economy’ in science. Our results show how growth relates to ‘citation inflation’, increased connectivity in the citation network resulting from decreased levels of uncitedness, and a narrowing range of attention – as both very classic and very recent literature are being cited increasingly less. The decreasing attention to recent literature published within the last 6 years suggests that science has become stifled by a publication deluge destabilizing the balance between production and consumption. To better understand these patterns together, we developed a generative model of the citation network, featuring exponential growth, the redirection of scientific attention via publications’ reference lists, and the crowding out of old literature by the new. We validate our model against several empirical benchmarks, and then use perturbation analysis to measure the impact of shifts in citing behavior on the synthetic system's properties, thereby providing insights into the functionality of the science citation network as an infrastructure supporting the memory of science.  相似文献   

A Preliminary Assessment of the Impact of Counseling on Student Adjustment to College     

Thomas J. DeStefano  Ramona N. Mellott  Jerry D. Petersen 《Journal of College Counseling》2001,4(2):113-121

This study compared adaptation to college for students receiving counseling at a university counseling center with adaptation by control counterparts. Students receiving counseling initially reported lower adaptation scores as measured by the Student Adaptation to College Questionnaire. After counseling, scores no longer differentiated between the 2 groups. Results suggest that counseled students were affected positively by this experience.  相似文献   

Emergence and characterization of sex differences in spatial ability: a meta-analysis   总被引：21，自引：0，他引：21  

M C Linn  A C Petersen 《Child development》1985,56(6):1479-1498

Sex differences in spatial ability are widely acknowledged, yet considerable dispute surrounds the magnitude, nature, and age of first occurrence of these differences. This article focuses on 3 questions about sex differences in spatial ability: What is the magnitude of sex differences in spatial ability? On which aspects of spatial ability are sex differences found? and When, in the life span, are sex differences in spatial ability first detected? Implications for clarifying the linkage between sex differences in spatial ability and other differences between males and females are discussed. We use meta-analysis, a method for synthesizing empirical studies, to investigate these questions. Results of the meta-analysis suggest that sex differences arise on some types of spatial ability but not others, that large sex differences are found only on measures of mental rotation, that smaller sex differences are found on measures of spatial perception, and that, when sex differences are found, they can be detected across the life span.  相似文献   

Ted Brader (2006). Campaigns for Hearts and Minds. How Emotional Appeals in Political Ads Work. Chicago, The University of Chicago Press, 280 pp., ISBN 0-226-06989-3.     

Petersen  Thomas 《Int. Journal of Public Opinion Research》2006,18(2):256-258

Here is a book that makes you want to shout, ‘Finally!’For decades, political scientists and communication researchershave been focusing intensively on the question of how peoplemake their final voting decision and how this decision is influencedby reporting in the mass media and campaign advertising. Nevertheless,even though there is enough literature on this subject to filla library, only very few studies have dealt with the issue ofemotional appeals in election coverage and campaign advertising—andvoters’ emotional, possibly irrational reactions to theseappeals. Although numerous findings in the fields of psychology,neuroscience, and behavioral research suggest that emotionalappeals and reactions play an important role when it comes toall kinds of decisions—which, of course, also includesvoting decisions—social researchers in the United Statesand elsewhere have,  相似文献   

An ethnographic field study of the influence of social interactions during the school day for children diagnosed with ADHD     

Kim Michéle Feder  Carsten Kronborg Bak  Kirsten Schultz Petersen  Henrik Vardinghus-Nielsen  Tine Mechlenborg Kristiansen 《欧洲特需教育杂志》2017,32(3):406-421

The aim of this ethnographic field study was to investigate the influence of school-day social interactions on the well-being and social inclusion of children diagnosed with ADHD. The empirical data consisted of participant observations and informal interviews over a three-month period at a Danish primary school. Two ADHD-diagnosed 11-year-old boys in the fourth and fifth grades were followed on an alternating basis. The field notes were analysed using a qualitative content analysis that incorporated Etienne Wenger’s concepts of social identity and participation. The results revealed that the effects of school-day social interactions are complex and situation dependent. Medication, friendships and relationships with teachers and other adults strongly influence how children diagnosed with ADHD participate in social interactions and, consequently, how they thrive. We argue that it is important to emphasise the mediation of these children’s participation in the classroom community throughout an entire school day to ensure their social inclusion and well-being.  相似文献   

The ‘good life’ and the ‘rich portfolio’: young women,schooling and neoliberal subjectification     

Gabrielle O'Flynn  Eva Bendix Petersen 《British Journal of Sociology of Education》2007,28(4):459-472

This paper explores the ways two young women, living in Australia, make sense of themselves, their activities, and futures. The two young women come from two different schooling contexts—a prestigious private school and a government school. We analyse their self‐narratives in relation to neoliberal discourse, and consider how, and with what effects, their school contexts privilege and make available neoliberal discourses, and work to produce different subjectivities and notions of ‘worthwhile’ or ‘good’ lives. Conceptualising schools as sites of subjection, we analyse the discourses that their respective schools make available to the young women, and how they have appropriated them. We suggest that the different exposure and access to neoliberal discourses position the women very differently in terms of future possibilities and work‐life scenarios in the neoliberal economy. In that way, the article seeks to make a contribution towards understanding schools as implicated in social (re)production and in the (re)production of classed subjectivities.  相似文献   

“Real World” connections through videoconferencing— we’re closer than you think!     

Ruth Petersen 《TechTrends》2000,44(6):5-11

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Can an immersive virtual reality simulation increase students’ interest and career aspirations in science?     

Guido Makransky  Gustav B. Petersen  Sara Klingenberg 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(6):2079-2097

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Length effects in pseudo-word spelling: stronger in dyslexic than in non-dyslexic students     

Holger Juul  Dorthe Klint Petersen 《Annals of dyslexia》2017,67(3):369-382

It is often discussed whether dyslexics show a deviant pattern of reading and spelling development when compared to typically developing students, or whether they follow the same pattern as other students, only at markedly slower rate. The present cross-sectional study investigated phonological encoding skills in dyslexic Danish students. We compared dyslexic and non-dyslexic students from grades 3, 5, 7, and 9 and examined whether effects of item length were stronger in the dyslexic groups. Mixed between-within subjects analyses of variance revealed significant interactions between dyslexia status and item length as the dyslexics at all grade levels were more affected by item length than their non-dyslexic peers. A marked developmental delay was apparent as the dyslexic group from grade 9 performed on approximately the same level as the non-dyslexic group from grade 3. Although the overall difference between these two groups was not significant, a significant interaction between dyslexia status and item length remained because the grade 9 dyslexics were more affected by item length than the younger non-dyslexic students. This difference in error profiles suggests a difference in the developmental patterns of dyslexic vs. non-dyslexic students.  相似文献   

“Ain't nobody gonna get me down”: An Examination of the Educational Experiences of Four African American Women Labeled With Disabilities     

Amy J. Petersen 《Equity & Excellence in Education》2013,46(4):428-442

This study used qualitative research methods to explore the educational experiences of four African American women with disabilities, revealing how each participant developed a critical consciousness in response to the dominant ideology surrounding the discourses of African American, woman, and disabled. The development of a critical consciousness led participants to counter the oppressive nature of their educational experiences by engaging in acts of resistance. Recommendations are made with regard to how K-18 educators might support and capitalize upon students' critical consciousness to facilitate equitable classroom communities.  相似文献