Erik J. Olsson

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The focus in this study is on social competence and behavioural problems in a group (n=57) of hearing-impaired 7- to 12-year-old children. Results were related to hearing status, school placement, and gender. Parent and teacher questionnaires were used to measure two aspects of social competence, prosocial orientation and social initiative, and three(More)
The paper presents and defends a Bayesian theory of trust in social networks. In the first part of the paper, we provide justifications for the basic assumptions behind the model, and we give reasons for thinking that the model has plausible consequences for certain kinds of communication. In the second part of the paper we investigate the phenomenon of(More)
There has been much interest in group judgment and the so-called 'wisdom of crowds'. In many real world contexts, members of groups not only share a dependence on external sources of information, but they also communicate with one another, thus introducing correlations among their responses that can diminish collective accuracy. This has long been known,(More)
A webmaster’s decision to link to a webpage can be interpreted as a “vote” for that webpage. But how far does the parallel between linking and voting extend? In this paper, we prove several “linking theorems” showing that link-based ranking tracks importance on the web in the limit as the number of webpages grows, given independence and minimal linking(More)