文章基本信息

标题：Pseudodiagnosticity: The Role of the Rarity Factor in the Perception of the Informativeness of Data
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作者：Marco D’Addario ; Laura Macchi
期刊名称：Psychology
印刷版ISSN：2152-7180
电子版ISSN：2152-7199
出版年度：2012
卷号：3
期号：6
页码：489-493
DOI：10.4236/psych.2012.36069
出版社：Scientific Research Publishing
摘要：This paper presents the results of a study designed to investigate the pseudodiagnosticity bias as a failure to identify and select diagnostically relevant information. The reported experiment (N = 240) aims to deepen understanding of the role played by the rarity of evidential features in a classical pseudodiagnosticity task. The problem used for the experiment was a classical pseudodiagnosticity task. Six experimental versions were constructed: they differed in the rarity of features proposed and in the percentages (high or low) associated with them. The results show that people’s responses appear to be influenced by the percentage values associated with explicit information more than by a rarity factor. When an initial piece of evidence is associated with a low percentage, the percentage of normatively diagnostic answers is greater than when this percentage is high. Furthermore, rarity is not, in itself, a crucial factor in the occurrence of pseudodiagnosticity bias. Rather, the perception of the difference between two evidential features in terms of informative value influences people’s responses when orienting a diagnostic evaluation. When people perceive an initial piece of evidence as having greater informative value than a second piece of evidence, they tend to (correctly) move their attention from the focal hypothesis to the alternative one.
关键词：Pseudodiagnosticity; Rarity; Informativeness of Data