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發言或緘默：心理安全與自我效能在社會資本影響社群網站使用者知識分享行為上所扮演的中介角色
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Table 1 Statistics of Measurement Model
Construct
Measurement item
Factor
loading
Cronbach’s
α
Reference
Structural
social capital
I know some friends on Facebook on a personal
level.
.90
.75
Lin (2011)
Chiu et al.
(2006)
I have frequent online contact with some friends
on Facebook.
.90
Obst and
White
(2005)
Cognitive
social capital
In Facebook communication, my friends and I
both share interesting narratives.
.89
.73
Lin (2011)
Chiu et al.
(2006)
In Facebook communication, my friends and I
both share life events.
.89
Obst and
White
(2005)
Relational
social capital
In Facebook communication, my friends and I
have a common view regarding appropriate
behavioral norms.
.82
.87
Lin (2011)
Nahapiet
and Ghoshal
(1998)
In Facebook communication, my friends and I
both have obligations to support each other.
.78
In Facebook communication, my friends and I
both identify with each other.
.88
Psychological
safety
I am not afraid to be myself on Facebook.
.89
.84
May et al.
(2004)
I am not afraid to express my opinions on
Facebook.
.88
There is no threatening environment on
Facebook.
.63
Knowledge
sharing self-
efficacy
I have confidence in my ability to provide
knowledge that my friends on Facebook
consider valuable.
.88
.87
Constant et
al. (1996)
Kalman
(1999)
I have the expertise, experiences, and insights
needed to provide knowledge that is valuable
for my friends on Facebook.
.93
I have confidence in responding or adding
comments to messages or articles posted by my
friends on Facebook.
.69