Unpacking, repacking, and anchoring: Advances in support theory
Unpacking, repacking, and anchoring: Advances in support theory
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DOI：
10.1037/0033-295x.104.2.406
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发表时间：
1997-04-01
影响因子：
5.4
通讯作者：
Tversky, A
中科院分区：
文献类型：
--
作者：
Rottenstreich, Y;Tversky, A
支持理论代表了根据焦点相对于备择假设的支持或证据强度的概率判断。它假设当事件的描述被分解为不相交的组件（隐式子可加性）时，事件的判断概率通常会增加。本文提出了该理论的一个重要扩展，其中显式析取的判断概率小于或等于其不相交分量的判断概率之和（显式次可加性）。一些关于概率和频率判断的研究证明了隐式和显式的次可加性。前者归因于可用性的增强，而后者归因于重新包装和锚定。
Support theory represents probability judgment in terms of the support, or strength of evidence, of the focal relative to the alternative hypothesis. It assumes that the judged probability of an event generally increases when its description is unpacked into disjoint components (implicit subadditivity). This article presents a significant extension of the theory in which the judged probability of an explicit disjunction is less than or equal to the sum of the judged probabilities of its disjoint components (explicit subadditivity). Several studies of probability and frequency judgment demonstrate both implicit and explicit subadditivity. The former is attributed to enhanced availability, whereas the latter is attributed to repacking and anchoring.