觀賞電影時視覺改變對調節個體間大腦血液動力反應的相關系數

Abstract

本研究利用功能性磁共振成像（fMRI）獲取在觀賞電影時的大腦血流動力反應，所呈現的電影素材拍攝成第一視角和第三視角，以研究視覺改變對個體的角色代入和情感代入程度的影響。研究使用個體間相關性（ISC）作為分析工具，使用觀後問卷和人際反應指數（IRI）用作行為測量工具。為了區分與角色代入和情感代入相關的神經基質，分析採用了分組 ISC 分析和 Mantel 檢測去處理大腦血液動力數據和行為數據。兩項分析結果在頂葉及顳枕區之間的腦區有相似的形態，這提出觀賞電影時的，第三人稱視角的影片會加強觀眾的角色代入，而第一人稱視角的影片會加強觀眾的情感代入。這項研究結果有助於理解角色代入和情感代入相關的神經反應機制，並期望對未來的社會認知研究有參考作用。

Function Magnetic Resonance Imaging (fMRI) was used to obtain the hemodynamic brain responses during perspective modulated naturalistic movie presentations to find the influence of perception to individual’s cognitive (perspective-taking) and affective (empathy) reactions. Inter-subject correlation (ISC) was used as the analysis tool. A post-movie survey and Interpersonal Reactivity Index (IRI) was used as the behavioral measurement tool. To distinguish the neural substrates related to perspective-taking and empathy, selected group ISC analysis and Mantel test were applied on the hemodynamic data and behavioral data. Two analysis deprive a common pattern of regions of interest around parietal-temporal-occipital area, which suggest the perception of movie imposed a stronger perspective taking with a third person’s perspective and imposed a stronger empathy with a first person’s perspective. The finding helps understanding the neural mechanism of perspective taking and would be a useful for future social cognition studies.