How (far) can rationality be naturalized?

The paper shows why and how an empirical study of fast-and-frugal heuristics can provide norms of good reasoning, and thus how (and how far) rationality can be naturalized. We explain the heuristics that humans often rely on in solving problems, for example, choosing investment strategies or apartments, placing bets in sports, or making library searches. We then show that heuristics can lead to judgments that are as accurate as or even more accurate than strategies that use more information and computation, including optimization methods. A standard way to defend the use of heuristics is by reference to accuracy-effort trade-offs. We take a different route, emphasizing ecological rationality (the relationship between cognitive heuristics and environment), and argue that in uncertain environments, more information and computation are not always better (the ??less-can-be-more?? doctrine). The resulting naturalism about rationality is thus normative because it not only describes what heuristics people use, but also in which specific environments one should rely on a heuristic in order to make better inferences. While we desist from claiming that the scope of ecological rationality is unlimited, we think it is of wide practical use.     

Opfer-überzeugungen

The public interest in ??new?? clinical symptoms is described exemplified by burnout, mobbing and trauma. In the background self-explanations by patients as well as interests of therapists can be recognized. Both can be understood as an expression of subconsciously reflected contemporary convictions. Post-traumatic stress syndrome and the sequelae of abuse, which are probably diagnosed too often in guideline correct psychotherapy, throw up questions on the appropriate therapy and possible injurious side effects. The social background to the psychotherapeutic fascination with trauma will be discussed.     

The hot hand exists in volleyball and is used for allocation decisions

The "hot hand" belief in sports refers to the conviction that a player has a higher chance of making a shot after two or three successful shots than after two or three misses (resulting in "streaks"). This belief is usually considered a cognitive fallacy, although it has been conjectured that in basketball the defense will attack a "hot" player and prevent streaks from occurring. To address this argument, we provide the first study on the hot hand in volleyball, where the net limits direct defensive counterstrategies, meaning that streaks can more likely emerge if a player is hot. We first establish that athletes believe in the hot hand in volleyball (Study 1A). Analyzing the top 26 first-division players, we then show that streaks do exist for half of the players (Study 1B). Coaches can detect players' performance variability and use it to make strategic decisions (Study 2A). Playmakers are also sensitive to streaks and rely on them when deciding to whom to allocate the ball (Study 2B). We conclude that for volleyball the hot hand exists, coaches and playmakers are able to detect it, and playmakers tend to use it "adaptively," which results in more hits for a team.     

Children can solve Bayesian problems: the role of representation in mental computation

Can children reason the Bayesian way? We argue that the answer to this question depends on how numbers are represented, because a representation can do part of the computation. We test, for the first time, whether Bayesian reasoning can be elicited in children by means of natural frequencies. We show that when information was presented to fourth, fifth, and sixth graders in terms of probabilities, their ability to estimate the Bayesian posterior probability was zero. Yet when the same information was presented in natural frequencies, Bayesian reasoning showed a steady increase from fourth to sixth grade, reaching an average level of 19, 39, and 53%, respectively, in two studies. Sixth graders' performance with natural frequencies matched the performance of adults with probabilities. But this general increase was accompanied by striking individual differences. More than half of the sixth graders solved most or all problems, whereas one third could not solve a single one. An analysis of the children's responses provides evidence for the use of three non-Bayesian strategies. These follow an overlapping wave model of development and continue to be observed in the minds of adults. More so than adults' probabilistic reasoning, children's reasoning depends on a proper representation of information.     

Resistance in group psychotherapy

The authors view resistance generally as healthy and a sign of a more or less intact ego. A brief review of the psychoanalytic literature and the group therapy literature presents resistance as a mechanism that closes off aspects of the internal and external world seen as potentially dangerous. Patient resistances are identified as coming from cultural values, fear of strangers, fear of regression, and resentment toward the therapist. Clinical vignettes of group patients and group interaction are presented. Finally, resistance of therapists and indications of such resistance are also explored.     

Attitudes toward older adults: The perceived value of grandparent as a social role

The present study examined the discrepancy between young and middle-aged adults' persistently negative attitudes toward older adults in general and their consistently positive attitudes toward grandparents. Two hundred-twenty young and middle-aged college students completed the Aging Semantic Differential and indicated or estimated (where appropriate) the average age for three categories of older adults: old people in general, typical (i.e., hypothetical, prototypical) grandparents, and their own grandparents. A pattern of results emerged in which students viewed older adults less positively than typical grandparents, who generally were viewed less positively than known grandparents. Because older people in general and typical grandparents were estimated as being similar in age, the positive attitudes expressed toward typical grandparents may be attributed to the social role of grandparent over and above any bias against increased age. Because students were most positive about their own grandparents, aspects of their individual grandparental relationships appear to have an additional, additive effect.     

Asking Difficult Questions: Task Complexity Increases the Impact of Response Alternatives

In providing behavioural frequency reports, respondents use the range of the response alternatives as a frame of reference, resulting in higher estimates on scales that offer high rather than low values. The present study demonstrates that the size of this effect increases with increasing question difficulty.     

Response scales as frames of reference: The impact of frequency range on diagnostic judgements

In social and psychological research, respondents are often asked to report the frequency of a behaviour by checking the appropriate alternative from a list of response categories provided to them. Previous research indicated that respondents extract comparison information from the range of the response alternatives, assuming that the average respondent is represented by values in the middle range of the scale, and that the extremes of the scale represent the extremes of the distribution. Extending this line of research, the present studies demonstrate that the users of a respondent's report are also likely to use the range of the response alternatives as a frame of reference in evaluating the implications of the report. Specifically, subjects are found to draw different conclusions about the respondent's personality (Experiment l ), or the severity of his or her medical condition (Experiment 21, from the same absolute frequency report, depending upon the range of the response scale on which the frequency was checked. Moreover, experienced medical doctors were as likely to be influenced by scale range as first-year medical students, suggesting that the phenomenon is of considerable applied importance. Implications for the use of response alternatives in psychological research and diagnostic judgement are discussed.