Generalized linear model analyses examining the effect of mode of item administration. The analysis is treating the mode effect as a main effect, after the potential effect of administration order (Time 1 vs Time 2) and form (Form A vs Form B) has been taken into account. The estimates show the mean differences that can be expected on a scale with standard deviation of 10 units. All differences are less than 10% of a standard deviation.
| Estimate (Units) | Standard Error | 95% CI | |
|---|---|---|---|
| Internet | 0 | ||
| Paper and pencil | 0.30 | 0.33 | −0.34 to 0.94 |
| Interactive voice recognition | 0.01 | 0.32 | −0.56 to 0.71 |
| Time 1 | 0 | ||
| Time 2 | 0.06 | 0.02 | 0.40 to 0.52 |
| Form A | 0 | ||
| Form B | −0.68 | 0.30 | −0.26 to −0.10 |