由於行動技術快速發展,近年來行動商務大幅成長,使用行動裝置瀏覽網頁、購物乃現今使用者經常使用之功能。然而使用行動裝置進行購物時,受限於螢幕尺寸較小的限制,頁面呈現資訊量無法比擬網頁型購物網站。在此限制下,如何設計適當的資訊架構,讓使用者能順利、有效率地瀏覽及完成購物資訊收集,已成為行動裝置介面設計上的挑戰。本研究探討不同廣度、深度之資訊架構呈現方式對介面使用性的影響,並檢驗當使用者執行不同複雜度之任務時,資訊架構及使用者之多工偏好是否會影響使用者的任務績效表現。
本研究使用3 x 3三因子混合實驗設計,探討資訊架構、任務複雜度對使用智慧手機之瀏覽表現及操作滿意度的影響。資訊架構呈現方式分為:淺廣、中庸、深窄三種類型;任務複雜度分為:簡單、中等、困難三種不同難度之任務。本研究發現:
1.越深的資訊架構,會增加使用者的迷失感與心智負荷。
2.資訊架構設計,中庸型資訊架構之任務表現最佳,而主觀迷失感與心智負荷則以淺廣型資訊架構評價最好。
3.任務複雜度與任務表現績效成反比。
研究結果顯示存在與資訊架構有關的認知處理,增加資訊架構的深度會使得困難任務更難以執行。本研究成果可做為評估行動商務介面設計之依據。
Smart phones have become an integrated content delivery platform for communications. Given the small display interfaces, how to navigate to access information in an efficient way is critical. The study investigated the task complexity, information structure of the smart phones and their interaction effects on usability and navigation performance.
The research findings provide research and practical implications. First, using medium (vs. shallow-wide and deep-narrow) information structure yielded faster task response time, at the expense of higher perceived disorientation and task load, however. Second, while there was no difference between medium and deep-narrow structures in terms of the number of taps for both middle and complex tasks, the corresponding response times differed dramatically. These findings suggest the existence of implicit cognitive processing that is more intrinsically structure related. Finally, task complexity moderates the effect of information structure on navigation performance.
The results indicated that increasing the levels of information structure can make complex tasks even more difficult to execute.