作業範圍大小對視覺注意力之影響

Abstract

本研究之目的是探討視覺作業範圍（視角）大小對注意力之影響。我們採用視覺搜尋作業，包括平行搜尋與序列搜尋兩組情況，以三種大小倍增的視角範圍呈現不同數量刺激物，測量受試者反應之時間。並為確保各視角所得之數據不會因距離因素影響，另增設一距離控制組以相同視角不同距離狀況下施測。實驗結果顯示：在序列搜尋中，反應時間會隨刺激物數量增加而呈現線性提升，並且在視角越大情況下，單位項目所需的搜尋時間也愈長；而在平行搜尋中，反應時間並未隨視角與刺激物數量不同而有影響。且由距離控制組結果得知，距離遠近因素在相同視角下對反應時間與刺激物數量並不會造成影響。就以上實驗結果顯示，於序列搜尋時，作業範圍大小確實會影響所需反應時間。

Attention plays an important role in designing various human-machine interfaces. However, our current knowledge about attention is largely based on data obtained with devices of moderate display sizes. As the display technology advances, the need for understanding the behavior of attention in wider range of viewing sizes increases accordingly. We studied the effect of display size on the observer's performance of visual search. The participants were required to do two types of visual search task, parallel and serial search, under three display size conditions (16°, 32°, and 60°). To rule out the possibility that the difference in viewing distances might contaminate the results, a control experiment was conducted to evaluate the effect of viewing distance. Our results show that serial, but not parallel search, is affected by the display size. The reaction time for detecting a target increases with the display size.