本文關(guān)鍵詞：不同刺激物在視覺空間認(rèn)知中的事件相關(guān)電位研究　出處：《上海交通大學(xué)》2009年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 視覺空間認(rèn)知 心理旋轉(zhuǎn) 事件相關(guān)電位 反應(yīng)時間 錯誤率 地形圖 獨立分量分析

【摘要】： 視覺空間認(rèn)知是人類認(rèn)知的重要一部分。視覺空間認(rèn)知有兩個最主要的外在因素,視覺刺激和空間信息編碼。本文對最簡單的二維空間認(rèn)知進(jìn)行研究,并將兩大類文字作為視覺刺激引入視覺空間認(rèn)知的研究中。 本文將正立和鏡像的兩大類文字,即字母和漢字,作為視覺刺激,并將他們編碼在不同的視覺空間角度上,要求被試對不同空間角度下的文字做出正確的判斷。本文記錄了正常被試者在進(jìn)行視覺空間任務(wù)操作時的腦電信號并獲得了事件相關(guān)電位及其地形圖,進(jìn)行了獨立分量分析以提取相關(guān)的事件相關(guān)電位的亞成分,并且比較了兩大類視覺刺激在視覺空間認(rèn)知任務(wù)中的對大腦活動機(jī)制的影響。 實驗結(jié)果表明,空間角度的增加會引起被試的反應(yīng)時和錯誤率的增加,事件相關(guān)電位的P300成分隨著空間角度的增加而逐漸減小,出現(xiàn)了幅度調(diào)制現(xiàn)象。相同的空間角度下,被試對漢字的反應(yīng)時和錯誤率都要比字母的要大,但是旋轉(zhuǎn)速度沒有顯著差異。通過事件相關(guān)電位的地形圖可以看出,大腦的頂區(qū)在不同的空間角度都一直處于活躍狀態(tài)。漢字頂區(qū)的活躍一直表現(xiàn)為半球均勢,字母的大腦活躍則隨著角度的增加逐漸偏向左側(cè)頂區(qū)。對事件相關(guān)電位進(jìn)行獨立分量分析后在180°得到了兩個極性相反的亞成分,表明P300成分中包含一個隨著空間角度的增加而負(fù)向增加的亞成分。 本文詳細(xì)地比較了兩大類刺激對視覺空間認(rèn)知任務(wù)的影響,闡明了視覺空間認(rèn)知的基本機(jī)制以及大腦的活躍區(qū)域,并嘗試用獨立分量分析來獲得兩個極性相反并且相互獨立的亞成分,證明獨立分量分析在獲得P300成分亞成分的可行性,使得對視覺空間認(rèn)知的機(jī)制研究更加透徹。
[Abstract]:Visual spatial cognition is an important part of human cognition. Visual spatial cognition has two main external factors, visual stimulation and spatial information coding. And two kinds of characters as visual stimuli are introduced into the study of visual spatial cognition. In this paper, the orthodox and mirrored characters, letters and Chinese characters, are used as visual stimuli, and they are encoded in different visual spatial angles. The subjects were asked to make a correct judgment on the characters from different spatial angles. In this paper, the EEG signals of the normal subjects were recorded and the event-related potentials and their topographic maps were obtained. Independent component analysis (ICA) was performed to extract the subcomponents of event-related potentials and the effects of two major types of visual stimuli on the mechanism of brain activity in visual spatial cognitive tasks were compared. The experimental results show that the increase of spatial angle will lead to the increase of reaction time and error rate, and the P300 component of event-related potential will gradually decrease with the increase of spatial angle. Under the same spatial angle, the response time and error rate of the subjects to the Chinese characters were higher than that of the letters. However, there is no significant difference in rotation speed. According to the topographic map of event-related potentials, the apical region of the brain has been active in different spatial angles. The activity of the top region of Chinese characters has always been shown as a hemispheric balance. On the other hand, the activity of the alphabetical brain gradually shifted to the left parietal region with the increase of the angle. Two opposite polar subcomponents were obtained at 180 擄by independent component analysis of event-related potentials. It is shown that the P300 component contains a subcomponent that increases negatively with the increase of the spatial angle. In this paper, the effects of two kinds of stimuli on visual spatial cognitive tasks are compared in detail, and the basic mechanism of visual spatial cognition and the active regions of the brain are clarified. The independent component analysis is used to obtain two subcomponents with opposite polarity and independent of each other, which proves the feasibility of independent component analysis in obtaining P300 component subcomponents. It makes the research on the mechanism of visual space cognition more thorough.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2009
【分類號】：R33

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃高明,周穎川,梁秋萍;臨床研究中重復(fù)測量資料的統(tǒng)計分析方法[J];廣西醫(yī)科大學(xué)學(xué)報;2000年02期

2 羅躍嘉,魏景漢;漢字識別的跨感覺通路ERP注意成分研究[J];中國科學(xué)C輯;1998年06期

3 游旭群,晏碧華;視覺空間能力的認(rèn)知加工特性[J];陜西師范大學(xué)學(xué)報(哲學(xué)社會科學(xué)版);2004年02期

4 郭小朝;漢字特征分析與實驗字取樣策略[J];人類工效學(xué);1999年03期

5 管益杰,方富熹;我國漢字識別研究的新進(jìn)展[J];心理學(xué)動態(tài);2000年02期

6 張武田，馮玲;漢字屬性匹配與大腦兩半球協(xié)同活動[J];心理學(xué)報;1998年02期

7 郭可教，，楊奇志;漢字認(rèn)知的“復(fù)腦效應(yīng)”的實驗研究[J];心理學(xué)報;1995年01期

8 宋華，張厚粲，舒華;在中文閱讀中字音、字形的作用及其發(fā)展轉(zhuǎn)換[J];心理學(xué)報;1995年02期

9 彭聃齡,王春茂;漢字加工的基本單元:來自筆畫數(shù)效應(yīng)和部件數(shù)效應(yīng)的證據(jù)[J];心理學(xué)報;1997年01期

10 沈模衛(wèi),朱祖祥;獨體漢字的字形相似性研究[J];心理科學(xué);1997年05期

本文編號：1407400