Department of Cognitive and Clinical Neuroscience, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Square J5, 68159, Mannheim, Germany.
Sci Rep. 2020 Aug 26;10(1):14203. doi: 10.1038/s41598-020-70828-y.
Prostheses are used to at least partly restore the body after limb amputation. Making the user accepting the prosthetic device as part of his or her body, i.e., inducing prosthesis embodiment, has been identified as major aim of prosthetic treatment. However, up to now, there is no consensus about the psychometric nature of prosthesis embodiment in limb amputees. In the present study, 118 unilateral lower limb amputees using a prosthesis were asked to complete an online questionnaire targeting prosthesis embodiment. Principal axis factoring revealed the factor structure of prosthesis embodiment, i.e., Ownership/Integrity, Agency, and Anatomical Plausibility, which resembles the embodiment structure previously identified for normally-limbed participants. The majority of amputees achieved prosthesis embodiment as assessed with the final version of the newly developed Prosthesis Embodiment Scale. Internal consistency was excellent, and test-retest reliability was satisfying, while the instrument was also sensitive for new prosthetic equipment. Validation on the basis of relationships to prosthesis satisfaction and adjustment to prosthesis use was performed. The Prosthesis Embodiment Scale could be a valuable tool for the assessment of perceptual correlates of successful body-prosthesis interaction in rehabilitative and research contexts, the latter which might further benefit from the comparability of psychometrically evaluated data.
假肢被用于在肢体截肢后至少部分恢复身体功能。使使用者接受假肢作为其身体的一部分，即诱导假肢体现，已被确定为假肢治疗的主要目标。然而，到目前为止，对于肢体截肢者的假肢体现的心理测量性质还没有共识。在本研究中，118 名使用假肢的单侧下肢截肢者被要求完成一项针对假肢体现的在线问卷调查。主成分因子分析揭示了假肢体现的因子结构，即所有权/完整性、代理权和解剖合理性，这与之前为正常肢体参与者确定的体现结构相似。大多数截肢者在使用新开发的假肢体现量表的最终版本时实现了假肢体现。内部一致性非常好，重测信度令人满意，同时该工具对新的假肢设备也很敏感。基于与假肢满意度和对假肢使用的调整的关系进行了验证。假肢体现量表可以成为评估康复和研究背景下成功的身体-假肢交互的感知相关性的有用工具，后者可能会从心理测量评估数据的可比性中受益。
