Design Objective

-

The Design Myth of Visual Layout and Operational Workflow for

Touch-based User Interfaces-

A Case Study of Digital Memo Application

1* 2 3

*,*

* **

2

15

****.*******@*****.***

(Touch)

(Think Aloud Protocol)

Z

Abstract

The interface design of TOUCH application is a new challenge for UI designers. Due to the lack of

related cases and guidelines, designers rely more on their subjective experiences than objective tested

knowledge. This might results in potential cognitive gaps between designers and users, and causes usability

problems. Hence, we adopt Think Aloud Protocol, a popular cognitive approach for design study, to tackle

this issue. In this research, we invite three subjects and conduct experiments focusing on issues of visual

layouts and operational flows. After coding and analyzing, we figure out that this cognitive approach did

effectively identify cognitive gaps. These gaps are 1) the designed layout representing flattened system

structure did achieve high accuracy and low learning curve, 2) Z type operational flow didn t effectively

reach designers original goals. Eventually, these research results could not only be reflection for this

specific design but also preliminary references for further investigation.

Keywords Touch based User Interface, Design Cognition, User Experience Gap, Think Aloud

Protocol

1 .

(Touch)

(Icon) (

(Fat Finger Problem), 2004;, 2005)

(, 2000)

(Touch Gestures) (, 2007)

2.2

(, 1988;, 1994;

(Intuitive), 1994)

(Think

Aloud Protocol) Ericsson Simon(1984)

(, 2005)

(, 2004) (Carroll, 1985)

(System Image) (Nielsen, 1983)

(Norman, 1988)

3.

(Design Cognition)

3.1

(Designer as User)

(Clinic

Research)

2.

2.1

Norman 1998 :

(ASUS Eee PC T91)

3.1.2 Z

(Flow Design)

(Intuitive)

Norman

(Mental Loading)

(Perceive) (Action) (Feedback)

(Disorientation)

Z

Z

B

3.1.1

A 3.2

C

D

Z

Nielsen(1983)

B

A B C

B

(Think Aloud

Protocol)

3.2.1

3 5

3.3.1

16 60 (Tool-Task-Preview)

3.2.2

(Think Aloud

Protocol)

(Digital Memo)

1.

2.

3.3.2

(Edit Tool Task Preview)

(Flow) Z

3.3

3.1

3.2

4.1.2

2

(Task Pattern)

4.1.3

A

D

4.

4.1

4.1.1

A D

2

(83%) 4.2 Z

1 14 4.2.1

13

3.3.2

(93%) 15

15 (100%)

Z

A

Z 4.2.2 Z

1. Carroll, J.M., Mack, R.L., 1985, Metaphor,

computing systems and active learning,

Z

International jour al of Man-Machine Studies,

22, 39-97.

Z 2. Ericsson, K.A., Simon, H.A., 1984, Protocol

Analysis: Verbal reports as data, Cambridge,

MA:MIT Press.

3. Nielsen, J., 1993, Usability Engineering, San

Francisco: Academic. man, D.A., 1983,

Design role based on analyses of human error,

Communication of AC.

4. Norman, D.A., 1988, The Design of Everyday

Things, New York: Currency.

5.

2004

6.

1988

7. (Donald A. Norman)

2005 P44~46

8.

1994

9.

2005

Z 10. 2004

2004 P117-124

5. 11.

1994

12.

-

2007 P377-384

13.

2000

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