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臺大管理論叢
第
26
卷第
2
期
55
Construct
Measurement item
Factor
loading
Cronbach’s
α
Reference
Knowledge
sharing
behavior
I frequently participate in knowledge sharing
activities and share my knowledge with my
friends on Facebook.
.76
.79
Lin et al.
(2009)
I usually spend a lot of time conducting
knowledge sharing activities on Facebook.
.84
When discussing a complicated issue, I am
usually involved in the subsequent interactions.
.63
Table 2 Results of CFA
Construct
Number
of items
Composite
reliability
AVE
Correlation between latent constructs
1.
2.
3.
4.
5.
6.
1. Structural social capital
2
.80
.80 .90
2. Cognitive social capital
2
.79
.79 .76 .89
3. Relational social capital
3
.86
.69 .60 .76 .83
4. Psychological safety
3
.85
.65 .44 .50 .46 .81
5. Knowledge sharing
self-efficacy
3
.88
.71 .45 .58 .49 .38 .84
6. Knowledge sharing
behavior
3
.79
.56 .46 .66 .48 .41 .68 .75
4.3 Model Fit and Hypothesis Testing
Regarding the hypothesized structural equation model, the resulting chi-square value
divided by degrees of freedom does not exceed 3 (
χ
2
(90) = 233.56), and all the fit indices
(GFI = .94, AGFI = .91, RMR = .05, RMSEA = .06, NFI = .97, NNFI = .98, CFI = .98, PNFI
= .73) were within the acceptable range, indicating a relatively good model fit to the data.
Table 3 provides the estimated parameters and results of the hypotheses testing. The
standardized path coefficients indicate that H1, H3, H4, H5, H8, and H11 are supported. For
H1, psychological safety has a significant, positive effect (
β
= .11,
p
< .01) on knowledge
sharing self-efficacy. As Table 3 shows, of the three facets of social capital, cognitive social
capital has the greatest impact. Cognitive social capital has a significant influence on all
three endogenous latent variables: psychological safety (H3;
γ
= .25,
p
< .05), knowledge
sharing self-efficacy (H5;
γ
= .46,
p
< .001) and knowledge sharing behavior (H8;
γ
= .54,
p
< .001). In contrast, relational social capital has only limited influences on the endogenous
latent variables because it only significantly affects psychological safety (H4;
γ
= .19,
p
<