Table 6.
Reliability, convergent and discriminant validity of the research constructs
| Construct | c.r. a | 1. | 2. | 3. | 4 | 5. | 6. | 7. |
|---|---|---|---|---|---|---|---|---|
| 1. Perceived Ease of EMR Use | .81 | .82b | ||||||
| 2. EMR Functional Coverage | - | .31c | - | |||||
| 3. Extended EMR Use | - | .37 | .83 | - | ||||
| 4. EMR User Satisfaction | .87 | .27 | .13 | .16 | .83 | |||
| 5. Perceived Performance Benefits | .95 | .49 | .38 | .40 | .40 | .89 | ||
| 6. Practice’s EMR Experience | 1.0 | -.17 | -.06 | .06 | -.22 | .26 | 1.0 | |
| 7. Physician’s EMR experience | 1.0 | .19 | -.01 | -.13 | .22 | -.27 | -.81 | 1.0 |
aComposite reliability coefficient = (Σλi)2/((Σλi)2 + Σ(1-λi2)) [inappropriate for formative constructs].
bDiagonal: (average variance extracted)1/2 = (Σλi2/n)1/2 [inappropriate for formative constructs].
cSubdiagonals: correlation = (shared variance)1/2.