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srgupta

http://www.ach.lit.ulaval.ca/Gratis/Evans_Electronic.pdf - 0 views

  • What is the effect of online availability ofjournal issues? It is possible that by makingmore research more available, online searchingcould conceivably broaden the work cited andlead researchers, as a collective, away from the“core”journals of their fields and to dispersedbut individually relevant work. I will show,however, that even as deeper journal back is-sues became available online, scientists andscholars cited more recent articles; even asmore total journals became available online,fewer were cited
    • srgupta
       
      Thesis
  • Figure 1 shows the speed of the shift toward commercial and free electronic provision of articles, and how deepening backfiles have made more early science readily available in recent years.
    • srgupta
       
      Clear evidence of increase in accessibility and availability of articles.
  • Panel regression models were used to explore the relation between online article availability and citation activity—average historical depth of citations, number of distinct articles and journals cited, and Herfindahl concentration of citations to particular articles and journals—over time (details on methods are in the Supporting Online Material)
    • srgupta
       
      Methodology
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  • The graphs in Fig. 2 trace the influence of online access, estimated from the entire sample of articles, and illustrated for journals and subfields with the mean number of citations. Figure 2A shows the simultaneous effect of commercial and free online availability on the average age of citations
  • The first question was whether depth of citation—years between articles and the work they reference—is predicted by the depth of journal issues online—how many years back issues were electronically available during the previous year when scientists presumably drafted them into their papers.
  • Collectively, the models presented illustrate that as journal archives came online, either through commercial vendors or freely, citation patterns shifted. As deeper backfiles became available, more recent articles were referenced; as more articles became available, fewer were cited and citations became more concentrated within fewer articles. These changes likely mean that the shift from browsing in print to searching online facilitates avoidance of older and less relevant literature. Moreover, hyperlinking through an online archive puts experts in touch with consensus about what is the most important prior work—what work is broadly discussed and referenced. With both strategies, experts online bypass many of the marginally related articles that print researchers skim. If online researchers can more easily find prevailing opinion, they are more likely to follow it, leading to more citations referencing fewer articles. Research on the extreme inequality of Internet hyperlinks (14), scientific citations (15, 16), and other forms of “preferential attachment” (17, 18) suggests that near-random differences in quality amplify when agents become aware of each other’s choices. Agents view others’ choices as relevant information—a signal of quality—and factor them into their own reading and citation selections. By enabling scientists to quickly reach and converge with prevailing opinion, electronic journals hasten scientific consensus. But haste may cost more than the subscription to an online archive: Findings and ideas that do not become consensus quickly will be forgotten quickly .
    • srgupta
       
      Conclusion and possible explanation
  • This research ironically intimates that one of the chief values of print library research is poor indexing. Poor indexing—indexing by titles and authors, primarily within core journals— likely had unintended consequences that assisted the integration of science and scholarship. By drawing researchers through unrelated articles, print browsing and perusal may have facilitated broader comparisons and led researchers into the past. Modern graduate education parallels this shift in publication—shorter in years, more specialized in scope, culminating less frequently in a true dissertation than an album of articles (19)
    • srgupta
       
      I have a hard time accepting this. A hint of nostalgia for the "old way" of doing things?
  • As 21st-century scientists and scholars use online searching and hyperlinking to frame and publish their arguments more efficiently, they weave them into a more focused—and more narrow—past and present.
    • srgupta
       
      Empirical results are convincing, but this isn't a given. New medium enables new forms of knowledge, and requires new forms of know-how.
    • srgupta
       
      Filter bubble
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    An empirical study of how the shift from print to online publication of journals has changed citation, research, and reading habits. Compelling use of data, though I find the some of the explanations somewhat tenuous.
David McGavock

The Hidden Savant in You | Psychology Today - 0 views

  • Savants can perform extraordinary cognitive feats much like trained experts, but unlike experts they usually cannot describe what makes them so talented, seemingly relying on intuition rather than conscious deliberation to quickly make choices.
  • he consensus among many researchers is that intuitions are judgments made by unconscious processes in the brain.
  • Studies have shown that inhibiting activity in certain areas of the brain can facilitate solving geometric puzzles.
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  • Allan Snyder has used transcranial direct current stimulation (DCS) to alter the activity both in the left and right hemispheres.
  • DCS was applied for only ten minutes, specifically to decrease activity in the left hemisphere and increase activity in the right hemisphere, 40 percent of subjects were able to solve the puzzle.
  • Tasks like solving the nine-dots puzzle are notoriously difficult because of our brains are structured in such a way as to limit creativity.
  • The left hemisphere is thought to govern the role that right-brain activity may play in cognition. Inhibiting activity in the left hemisphere of the brain is thought to remove the predisposition to interpret random elements in meaningful ways, allowing for more creative solutions generated in the right brain to make it into consciousness.
  • Savants thus may have a greater degree of conscious access to judgments of unconscious processes than non-savants.
  • As we become more skilled at manipulating brain processes through psychoactive drugs or electronic devices, we may be able to invoke savant-like skills in neurotypical people. 
Alex Grech

Plug in - but tune in, too - 1 views

  • We can't just drop some new electronic device into education and think our job is done. Quite the contrary, new technology is merely a catalyst for a serious rethinking of higher education for the Information Age.
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    An iPad or Kindle does not magically improve education, says Cathy Davidson
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