Pen-based interactions are becoming widely popular on a variety of devices, including tabletPCs, mobile devices and tabletop systems. The digital pens and tablets have evolved considerably and served users in creative industries. A digital pen can sense various auxiliary inputs, such as tilt, pressure and roll. Researchers have explored properties of each channel in isolation of another. Since the human wrist and fingers can operate multiple input channels simultaneously, a natural progression warrants examination of controllability when these channels are operated simultaneously. In this thesis, I explore a class of interaction techniques, a-coord input, which requires users to control two auxiliary channels simultaneously. Through experiments, I explore the design space of a-coord input and investigate the effect of changing the order in which the channels are combined. Furthermore, I investigate its effectiveness for discrete and continuous selection tasks. Finally, this thesis shows the value of a-coord input through several applications.

Pen-based interactions are becoming widely popular on a variety of devices, including tabletPCs, mobile devices and tabletop systems. The digital pens and tablets have evolved considerably and served users in creative industries. A digital pen can sense various auxiliary inputs, such as tilt, pressure and roll. Researchers have explored properties of each channel in isolation of another. Since the human wrist and fingers can operate multiple input channels simultaneously, a natural progression warrants examination of controllability when these channels are operated simultaneously. In this thesis, I explore a class of interaction techniques, a-coord input, which requires users to control two auxiliary channels simultaneously. Through experiments, I explore the design space of a-coord input and investigate the effect of changing the order in which the channels are combined. Furthermore, I investigate its effectiveness for discrete and continuous selection tasks. Finally, this thesis shows the value of a-coord input through several applications.

書寫行為與書寫者的人格特質關係密切。書寫筆跡並非僅是單純的手部活動的結果， 且係書寫者人格（Personality ）的表現，書寫者的人格各有不同，則筆跡必因之而 異；從書寫行為中，我們可以推知書寫者的人格特質，而在書寫行為中，筆壓（Pen pressure）和書寫速度（Writing speed ）是較不可能被學習、模仿的，因此，在書 寫過程中，具有高度的自然性（Naturalness ）和即興、自發性（Spontaneity ）。 基於上述假設，在本論文中，我們選擇書寫行為中筆壓與時間變項來探討其與書寫者 在內－外向（Extroversion -Introversion）勇猛性（Psychoticism）、神經質（ Neuroticism ）及場地獨立－依賴性（Field independent v.s. depedent ）等四項 人格特質的關係。 本研究收集26名男女大學生及13名精神病人在書寫行為中之筆壓變項，與人格特質變 項一分別以艾氏人格問卷（Eysenck Personality Questionnarire）、藏圖測驗二種 人格測驗測量之一間的關係。所得之主要結論如下： 1.性格愈內向的，筆壓愈重。 2.性格愈外向的，筆壓愈輕。 3.場地獨立性傾向愈高的，筆壓愈輕。 4.場地依賴性傾向愈高的，筆壓愈重。 5.精神病人之筆壓平均高於正常人組。 6.筆壓愈重者，書寫速度愈慢。 7.筆壓愈輕者，書寫速度愈快。