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系統識別號 U0026-0209201517410600
論文名稱(中文) 注意力對促發與再認作業中的重複抑制效果之影響
論文名稱(英文) The effects of Attention on Repetition Suppression in Priming and Recognition Tasks
校院名稱 成功大學
系所名稱(中) 心理學系認知科學碩士班
系所名稱(英) MS in Cognitive Science
學年度 103
學期 2
出版年 104
研究生(中文) 賴瀚元
研究生(英文) Han-Yuan Lai
學號 U76981052
學位類別 碩士
語文別 中文
論文頁數 61頁
口試委員 指導教授-林君昱
口試委員-龔俊嘉
口試委員-陳德祐
中文關鍵字 再認  促發  重複抑制  注意力  功能性磁振造影  fMRI 
英文關鍵字 recognition  priming  repetition suppression  attention  fMRI 
學科別分類
中文摘要 重複抑制(repetition suppression,簡稱為RS)是大腦某些區域在重覆看到相同的刺激時,活化程度會減低的一種現象。它被認為可能是行為促發效應(priming effect)的神經基礎,是一種知覺層次、自動化的機制,在不同的作業要求下應該都會出現。且被利用來發展出fMR-Adaptation的研究方法、來檢測大腦各腦區神經細胞的功能特性,並使其空間解析度有可能可超越傳統fMRI的水準(Grill-Spector & Malach, 2001)。但在過去研究中,很少有報告在再認記憶的作業下觀察到重複抑制現象,有一個可能是重複抑制有可能並非如想像的為一低階的機制;而另一種假設則是重複抑制的確為一低階機制,也存在於再認作業中,但在傳統的再認作業中,注意力可能偏向於重複的舊刺激之上,因而得到較多的注意力資源與神經活化的加成,減少了原本的重複抑制的大小。本研究即欲沿續後者的假設,藉由直接比較促發與不同種類的再認作業的方式,探討在再認記憶中不同注意力偏向可能對重複抑制造成的影響。結果發現當受試者只對第一次出現的圖片做反應時,相關腦區有出現較大、較廣的重複抑制現象的趨勢,與我們的研究假設相符,並讓我們在再認作業中也觀察到顯著的重複抑制效果。後續研究應更深入闡明注意力對重複抑制的影響,以及促發與重複抑制之間的關聯與其神經機制。
英文摘要 Repetition suppression (RS) refers to the phenomenon that when seeing repeated stimuli, some brain regions would show decreased neural activations responding to the stimuli. It has been proposed to be the underlying neural mechanism of behavioral priming effect, and it thought to be a perceptual-level and automatic process; therefore, it should exist regardless of task demand or instructions. It has been the basis for developing some tools to study visual systems, such as the fMR-Adaptation method. It has the advantage of overcome some of the limitation of the spatial resolution of fMRI. However, although many studies has found RS using priming paradigms, few has reported RS using recognition memory paradigms, even though they are very similar to each other. One explanation is that repetition suppression is not low-level mechanism. The other one is that RS is automatic, but in a traditional recognition memory task, participants’ attention might be shifted to “finding old/repeated stimuli”. And this may imposed additional attention-related neural activations to the original responses, thus washing out the decreased activations due to RS.
Our research examined the latter hypothesis described above. We conducted a priming and three different versions of recognition memory tasks, and then compared their fMRI RS responses to see how attentional manipulations might affect RS.
The results generally supported our hypothesis. When participants were required to only respond to the new stimuli, certain brain regions produced greater RS than the traditional or respond-to-old-stimuli-only recognition memory tasks. This finding offered some insights for future research on this topic.
論文目次 摘要 I
Extended Abstract II
致謝 VII
目錄 VIII
圖表目錄 X
第一章 序論 1
第一節 促發效應 1
第二節 功能性磁振造影與重複抑制現象 2
第三節 重複抑制現象與行為促發效應之間的關連性存在與否 2
第四節 注意力對重複抑制現象的調變 4
第五節 外顯作業中原本可能也存在重複抑制現象 6
第六節 研究目的與假設 7
第二章 研究方法 11
第一節 促發作業及三種再認作業 11
實驗參與者 11
實驗刺激材料 12
實驗設計 12
程序 14
第二節 功能性腦區定位作業 17
實驗參與者 17
實驗刺激材料 17
實驗設計 17
程序 18
第三節 磁振造影影像之取得 19
第四節 功能性磁振造影影像資料分析方式 19
第三章 結果 23
第一節 行為資料分析 23
第二節 fMRI影像資料分析 27
ROI分析 27
叢集層次(cluster level)的分析 33
全腦影像資料分析 36
第四章 討論 47
第一節 注意力對重複抑制效果的影響 47
第二節 行為促發和重複抑制現象的解離 48
第三節 在普通的再認作業中也發現了重複抑制現象 48
第四節 不同類型的刺激對重複效果之影響 50
第五節 再認作業中指導語對作業本質之影響 50
第六節 頂葉的重複增強現象 52
第七節 總結歸論 53
參考文獻 54
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