perceived usefulness, perceived ease of use, and user acceptance of information technology

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指指指指 指指指指指 指指指 指指指 指指指指 : 100/01/04 Perceived Usefulness, Perceived Ease of Use, and User Acceptance of Information Technology Davis, F.D. MIS Quarterly, 13(3), 1989

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Perceived Usefulness, Perceived Ease of Use, and User Acceptance of Information Technology. 指導教授:任維廉老師 報告人:陳思淵 報告日期 : 100/01/04. Davis, F.D. MIS Quarterly, 13(3), 1989. 自我介紹. 陳思淵 高雄人 興趣 : 聽音樂、看電影、游泳 求學經歷:東吳大學資科系肄業      逢甲大學運管系畢業      交通大學運管所在學 - PowerPoint PPT Presentation

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Page 1: Perceived Usefulness, Perceived Ease of Use,  and User Acceptance of Information Technology

指導教授:任維廉老師 報告人:陳思淵 報告日期 : 100/01/04

Perceived Usefulness, Perceived Ease of Use, and User Acceptance of Information Technology

Davis, F.D. MIS Quarterly, 13(3), 1989

Page 2: Perceived Usefulness, Perceived Ease of Use,  and User Acceptance of Information Technology

自我介紹

陳思淵高雄人興趣 : 聽音樂、看電影、游泳求學經歷:東吳大學資科系肄業     逢甲大學運管系畢業     交通大學運管所在學王晉元教授 lab

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簡報大綱

前言理論基礎量表的發展與前測研究一研究二討論

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前言

如何解釋以及使用者對資訊科技的接受度,一直是MIS 研究及軟體銷售者的重要議題

以往預測使用者滿意度的有效量表並不多,實務上所使用的主觀量測方式並不具效度;以往研究量測大多未與系統使用情形具高度相關

研究目的 : 發展一份新量表並驗證其效度

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使用者接受度

知覺有用性 (Perceived Usefulness, PU) : 使用某系統,將有助於增進工作績效的程度。 當認知系統的有用性程度愈高,對系統的態度愈正向。

知覺易用性 (Perceived Ease of Use, PEOU) : 使用某系統的容易程度。 當認知系統愈容易學習,則對系統的態度愈正向。

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理論基礎

PU 與 PEOU 為使用者行為的決定因素(Schultz and Slevin , 1975; Robey, 1979)

自我效能理論 (Self-efficacy theory) : 判斷是否有能力或動機去執行某件任務 (Bandura 1982)

Self-efficacy → PEOU Outcome → PU

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理論基礎

成本效益典範 (Cost-benefit Paradigm) 行為決定理論中的成本效益典範亦和 PU 與 PEOU 有關。

(Beach and Mitchell, 1978)

創新的採用 (Adoption of Innovations) 創新的採用中 PEOU 扮演重要的角色。

(Tornatzky and Klein, 1982)

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理論基礎

通道配置模式 (Channel disposition model) Value (important ,relevant,useful,valuable) → PU Accessibility (convenient,controllable,easy,unburdensome) →PEOU

(Swanson 1987)

資料報告的評估 (Evaluation of information reports)) Perceived Importance →PU Perceived Usableness → PEOU

(Larcker & Lessig1980)

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理論基礎 ( 其他領域研究 )

使用者知覺選擇通訊科技產品,有二項基本的影響構面: Ease of use → PEOU Effectiveness → PU (Hauser & Simmie1981)

HCI (human-computer interaction) : 此類研究大都將研究焦點放在 EOU 設計考量

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量表的發展與前測

依據文獻產生 PU 與 PEOU 各 14 個候選問項利用前測將問項刪減至 10 項,以增加效度

判斷準則:優先順序與分群 知覺有用性的初始問項

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知覺易用性的初始問項

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知覺有用性前測結果

A :工作效率 B :生產力與時間的節省 C :學習系統對工作的重要性

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知覺易用性前測結果

A :身體的勞力 B :心理的勞力 C :易於學習的程度13

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研究一

針對 10 個問項分析信度、收斂效度、區別效度及因素效度

樣本來源 : 120 位 IBM 研發實驗室人員

有用性及易用性調查 : PROFS 電子郵件系統及 XEDIT 編輯軟體 2 項軟體

回收問卷 112 份 (93%)

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Cronbach α 知覺有用性 =0.97 ;知覺易用性 =0.91多重特質多方法 (MTMM) :

收斂效度 (monotrait-) 相同方法量測相同構面之結果應具高度相關 MTMM

不同方法量測相同構面之結果應具次高相關 MTHM

區辨效度 (heterotrait-) 相同方法量測不同構面之結果應具低度相關 HTMM 不同方法量測不同構面之結果應具最低度相關 HTHM

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Construct

Perceived Usefulness Perceived Ease of Use

Same Trait/Diff. Method

DifferentTrait

Same Trait/Diff. Method

DifferentTrait

CorrelationSize

Elec. Mail

XEDIT Same Meth.

Diff. Meth.

Elec. Mail XEDIT Same Meth.

Diff. Meth.

-.20 to -.11 -.10 to -.01 .00 to .09 .10 to .19 .20 to .29 .30 to .39 .40 to .49 .50 to .59 .60 to .69 .70 to .79 .80 to .89 .90 to .99

41420 7

41126 4

325

6252725 7

2 2 914 9 3 3 3

2 91113 8 2

11512

1 5324011 1

# Correlations 45 45 10 90 45 45 10 90

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因素效度 (主成份法 , 斜交轉軸法 ) :

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研究二

樣本來源 : Boston 大學 40 位 MBA 學生。軟體: Chart-Master 與 Pendraw(繪圖軟體 )

Cronbach α 知覺有用性 =0.98 ;知覺易用性 =0.94

因素效度 因素抽取 - 主成份分析法 斜交轉軸法

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因素分析表

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討論

新量表發展步驟相關性 : 有用性 / 使用程度 > 易用性 / 使用程度?易用性為有用性的前因,非直接 (平行於有用性 ) 影

響使用程度 (usage) 。 易用性 -> 有用性 (mediated) -> 使用程度

使用程度的量測是採用自我認知方式。無法得知自我認知方式對於反應實際行為的精確度為何。

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Thank you~