Information Technology Reference
In-Depth Information
Table 3. Reliability and discriminant validity
(revised model at time 1)
Cr
ave
piit
.
.
sF
.0
.
Cse
.
.
eou
.
.
pu
.
.
pbC
.
.
aFF
.
.0
int
.
.
CR = Composite
Reliability
AVE = Average Variance
Extracted
piit
sF
Cse
eou
pu
pbC
aFF
int
piit
0.77
sF
0.
0.66
Cse
0.
0.
0.79
eou
0.
-0.0
0.
0.82
pu
0.
0.
0.
0.
0.85
pbC
0.
0.
0.
0.
0.
0.83
aFF
0.
0.
0.
0.
0.
0.
0.89
int
0.
0.
0.
0.
0.
0.
0.
0.85
PIIT - personal innovativeness in the domain of IT; SF - social factors; CSE
- computer self-efficacy; EOU - ease of use; PU - perceived usefulness; PBC
- perceived behavioral control; AFF - affect; INT - future intentions
Diagonal elements represent the square root of the average variance extracted.
Off diagonal elements represent correlations. For discriminant validity, the
diagonal elements should be higher than the off-diagonal elements, indicating
that the variance shared between a construct and its measures is higher than
the variance shared between construct pairs.
The magnitude of the path (β = 0.17), however,
still suggests a smaller effect than that of affect
or perceived usefulness. No direct effect of social
factors on intentions was found, although the total
effects in Time 1 were substantive.
With respect to the hypotheses directly tested
in this study, PBC was found to exert a moderate
influence on perceived ease of use at Time 1, and a
strong influence at Time 2 (H1). General computer
self-efficacy exerted moderate but significant
influences on both EOU and affect at both time
periods (H3, H4). The influence on perceived
usefulness was significant at Time 1 but not at
Time 2 (H2). Interestingly, the effect on perceived
ease of use was stronger at Time 2, resulting in
an increased indirect effect of self-efficacy on
perceived usefulness, partly compensating for
the reduced direct effect. Thus, it appears that
with direct experience, people can separate the
potential of the software from their ability to
realize that potential.
Search WWH ::
Custom Search