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1.
Recently, several theories of decision making and probability judgment have been proposed that take into account ambiguity (Einhorn and Hogarth, 1985; Gardenfors and Sahlin, 1982). However, none of these theories explains exactly what the psychological causes of ambiguity are or addresses the issue of whether ambiguity effects are rational. In this paper, we define ambiguity as the subjective experience of missing information relevant to a prediction. We show how this definition can explain why ambiguity affects decisions in the ways it does. We argue that there are a variety of rational reasons ambiguity affects probability judgments and choices in the ways it does. However, we argue that the ambiguity effect does not cast doubt on the claim that utility theory is a standard of rational choice. Rather, we suggest that the effect of ambiguity on decisions highlights the fact that utility theory, like any normative model of decision making only prescribes the optimal decision, given what one knows. 相似文献
2.
Zajonc's (1965) drive theory explanation argues that greater arousal tends to impair performance on difficult tasks. The hypothesis that arousal generated by “pressure situations” during major league baseball games would hinder batting performance—a difficult task—was tested by examining such performance during the 1989 season. Six “pressure situations” were identified, some occurring during the late innings of close games and others occurring throughout the game when there were two outs. Two measures of batting performance (batting average and slugging average) were employed. Results indicated broad support for the hypothesis. Reasons for this pattern are discussed, as are possible alternative explanations for these findings. 相似文献
3.
This paper explores the notion of truthfulness in research on conversational remembering. It argues that people's accounts of past events, before they can be taken as data on the cognitive workings of memory, need to be examined as contextualized and variable productions that perform pragmatic and rhetorical work; no one version can be taken as a person's real memory. The consequences of this discourse-analytical perspective are examined first through a critical discussion of Ulric Neisser's study of John Dean's testimony to the senate ‘Watergate’ committee. The issues are then explored more deeply in an analysis of reportings of a different event, in which similar (Watergate-like) issues of memory, truth and accuracy are also at issue. It is argued that: (a) all of Neisser's three kinds of memory–verbatim, gist and ‘repisodic’–involve problematical assumptions concerning their relation to some true, original event; and (b) that Dean's accounts of his memory and his displays of memory should be approached as occasioned productions oriented pragmatically to the assignment of guilt and avoidance of scapegoating. Through an analysis of newspaper reports (based on memory) of a controversial briefing given by the then British Chancellor of the Exchequer, Nigel Lawson, we then examine: (a) how discourse about what could be used as an arbiter of truth was rhetorically organized; (b) how participants' versions of events were constructed rhetorically, as parts of arguments; (c) that both sides in the dispute maintained the coherence of their positions by a form of error accounting similar to that used by Neisser with respect to Dean. It is suggested that cognitive psychologists, whether working in the laboratory or attempting to do real-world studies of everyday remembering, need to avoid simplistic notions of true original events, and can do so by addressing the rhetorical organization of participants' memory accounts. 相似文献
4.
Jonathan Grainger J. Kevin O’Regan Arthur M. Jacobs Juan Segui 《Attention, perception & psychophysics》1992,51(1):49-56
Two experiments are described that measured lexical decision latencies and errors to five-letter French words with a single higher frequency orthographic neighbor and control words with no higher frequency neighbors. The higher frequency neighbor differed from the stimulus word by either the second letter (e.g.,astre-autre) or the fourth letter (chope-chose). Neighborhood frequency effects were found to interact with this factor, and significant interference was observed only tochope-type words. The effects of neighborhood frequency were also found to interact with the position of initial fixation in the stimulus word (either the second letter or the fourth letter). Interference was greatly reduced when the initial fixation was on the critical disambiguating letter (i.e., the letterp inchope). Moreover, word recognition was improved when subjects initially fixated the second letter relative to when they initially fixated the fourth letter of a five-letter word, but this second-letter advantage practically disappeared when the stimulus differed from a more frequent word by its fourth letter. The results are interpreted in terms of the interaction between visual and lexical factors in visual word recognition. 相似文献
5.
Elizabeth F. Loftus Karen Donders Hunter G. Hoffman Jonathan W. Schooler 《Memory & cognition》1989,17(5):607-616
In two experiments involving a total of 542 subjects, a series of slides depicting a burglary was shown. After the initial event, subjects were exposed to one or more narratives about the event that contained some misinformation or neutral information about four critical details. Finally, subjects were tested on their memories of what they saw, and their reaction times and confidence levels were measured. When subjects took a standard test in which the misinformation item was a possible response option, they responded very quickly and confidently when making this incorrect choice. Misled subjects responded as quickly and confidently to these "unreal" memories as they did to their genuine memories. It does not seem, then, that the misinformation effect arises from a large proportion of subjects who must resolve a conflict between two memories when they are tested, a conflict that would be expected to take time. When subjects took a modified test in which the misinformation item was not a possible response, misled subjects were as accurate as were controls, but they responded more slowly, regardless of whether they ultimately chose the right or wrong option. These findings indicate that misinformation does introduce some form of interference not detected by a simple test of accuracy. 相似文献
6.
7.
Elizabeth F. Loftus Jonathan W. Schooler Stanley M. Boone Donald Kline 《Applied cognitive psychology》1987,1(1):3-13
In three experiments, 469 subjects watched a short videotape of a bank robbery and later estimated the duration of the tape. Subjects invariably overestimated the durations. Accuracy of time estimation was unrelated to amount of free recall (Experiment 1) or accuracy of memory (Experiment 2). Females overestimated to a greater degree than males (Experiments 2 and 3). A more stressful version of the event produced greater overestimates than a less stressful version (Experiment 3). The relationship between induced arousal and time estimation appears to be different for men and women. 相似文献
8.
Jonathan Sinclair Carey 《The Journal of medical humanities》1987,8(1):19-25
This paper argues that the expert witness who offers empathic testimony may significantly assist the trial lawyer in defending certain personal injury cases. The author considers his own congenital deformity from a subjective and objective analysis of experience. He then uses this deformity and the analysis to illustrate empathic testimony. A courtroom example is given. The conclusion argues the importance of permitting the experience of psychic trauma to speak for itself. It is also concluded that such experience and its analysis cannot be easily refuted as psychological projection. Trial lawyers could find the use of empathic testimony and its analysis of experience an effective tactic. 相似文献
9.
The role of factor analysis in the development and evaluation of personality scales 总被引:20,自引:0,他引:20
The purpose of this paper is to examine the usefulness of factor analysis in developing and evaluating personality scales that measure limited domain constructs The approach advocated follows from several assumptions that a single scale ought to measure a single construct, that factor analysis ought to be applied routinely to new personality scales, and that the factors of a scale are important if it can be demonstrated that they are differentially related to other measures A detailed study of the Self-Monitoring Scale illustrates how factor analysis can help us to understand what a scale measures A second example uses the self-esteem literature to illustrate how factor analysis can clarify the proliferation of scales within a single content domain Both examples show how factor analysis can be used to identify important conceptual distinctions Confirmatory techniques are also introduced as a means for testing specific hypotheses It is concluded that factor analysis can make an important contribution to programmatic research in personality psychology 相似文献
10.