The projected hand illusion: component structure in a community sample and association with demographics, cognition, and psychotic-like experiences
The projected hand illusion: component structure in a community sample and association with demographics, cognition, and psychotic-like experiences
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DOI：
10.3758/s13414-014-0748-6
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发表时间：
2015-01-01
影响因子：
1.7
通讯作者：
Waters, Flavie A.
中科院分区：
文献类型：
--
作者：
Graham, Kyran T.;Martin-Iverson, Mathew T.;Waters, Flavie A.
投射手错觉（英语：Projected hand illusion，缩写为PHI）是橡胶手错觉（英语：Rubber hand illusion，缩写为RHI）的一种变体，两者都常用于研究自我知觉的机制。Longo等人（2008）开发了一份问卷，以测量RHI的质的变化。尚未对潜在危险指数的问卷进行这种心理测量分析。本研究试图验证Longo等人的问卷的微小修改，以评估社区样本（n = 48）中的PHI，并确定与选定的人口统计学（年龄，性别，教育年限），认知（数字广度）和临床（精神病样经历）变量的相关性。主成分分析的问卷数据提取四个组成部分：“他”手的体现，自己的手，听觉和听觉障碍，在同步和异步PHI条件。评估“体现”和“代理”的问题加载到正交组件上。更大的错觉等级与女性、年轻人和精神病样经历得分较高呈正相关。与认知表现无关。总的来说，这项研究证实，与PHI测量的自我知觉是一个多成分的结构，在许多方面类似的RHI。主要的区别在于将具身性和能动性分离为独立的结构，这可能反映了这样一个事实，即与RHI相比，PHI的“活”图像呈现了实验者的手和抚摸动作的更真实的画面。
The projected hand illusion (PHI) is a variant of the rubber hand illusion (RHI), and both are commonly used to study mechanisms of self-perception. A questionnaire was developed by Longo et al. (2008) to measure qualitative changes in the RHI. Such psychometric analyses have not yet been conducted on the questionnaire for the PHI. The present study is an attempt to validate minor modifications of the questionnaire of Longo et al. to assess the PHI in a community sample (n = 48) and to determine the association with selected demographic (age, sex, years of education), cognitive (Digit Span), and clinical (psychotic-like experiences) variables. Principal components analysis on the questionnaire data extracted four components: Embodiment of "Other" Hand, Disembodiment of Own Hand, Deafference, and Agency-in both synchronous and asynchronous PHI conditions. Questions assessing "Embodiment" and "Agency" loaded onto orthogonal components. Greater illusion ratings were positively associated with being female, being younger, and having higher scores on psychotic-like experiences. There was no association with cognitive performance. Overall, this study confirmed that self-perception as measured with PHI is a multicomponent construct, similar in many respects to the RHI. The main difference lies in the separation of Embodiment and Agency into separate constructs, and this likely reflects the fact that the "live" image of the PHI presents a more realistic picture of the hand and of the stroking movements of the experimenter compared with the RHI.