視覺光流在中介個體覺知其環境的機制上，主要強調其連續性。目的：探究：1)個體在自然站立時之身體擺動是否受不同連續性視覺光流影響；2)當個體被要求主動跟隨移動室做同步移動時，是否因爲不同連續性視覺光流的呈現，而有不同的身體移動。方法：16位成人站立於移動室中進行：1)三種燈光照明；2)移動室的移動與否；以及3)自然站立與求主動跟隨，組合共計十二個實驗操弄各兩次。每次連續記錄實驗參加者與移動室之位移數據並計算交叉相關，並以每次試作之標準差代表擺動大小，進行相依樣本二因子變異數分析。結果：1.自然站立的情境，無論是身體擺動的量或相關值在照明與環境變異的操弄上皆不顯著。2.主動跟隨的情境，不同照明的確造成個體追隨動作顯著差異。結論：1.因燈光閃爍造成視覺光流被阻斷，在自然站立的情境中，並不足以對實驗參加者的身體擺動產生影響。2.當實驗參加者主動跟隨移動室做動作時，視覺光流的結構改變會引致不同知覺而產生不同的行動因應。

The perception mechanism mediated by optic flow emphasizes the continuity. But whether the duration of continuity or the separation of the optic flow can influence the perception mechanism is waiting for proofs. Purpose: To investigate the two questions: 1) Is individuals' body sway affected by different continuity of optic flow when standing naturally? 2) Do the relative position between the individual and moving room change when exposing in different continuity of optic flow and being required to follow the room movement? Methods: 16 adult participants stood in the moving-room and randomly faced 12 manipulation conditions twice separately. The conditions composed mutual combinations based on factors: 1) Illumination in normal, quick twinkle, and slow twinkle; 2) Room movements when stationary and in motion; 3) Participants' action requirements in following and non-following the room. The movement data of participants and the room were recorded and computed to conduct the statistic analysis of the cross-correlation and repeated measure ANOVA for verifying the roles of the optic flow in perception mechanisms. Results: In quick twinkled illumination, the participants have more body sway but less cross correlationship with the room when they were required to follow the room in the moving-room stationary condition. Also, the participants move less when the room was moving and following was required. Conclusion: The twinkled illumination do cause that optic flow was transformed into optic array, and block the animal’s perception to induce inappropriate body sway.