Table 3.
Weighted Mean Intercorrelations, Confidence Intervals, and Q Statistics
| Variable | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 1. Future behavior | — | |||||||
| 2. Intention | r. = .4455 | — | ||||||
| CI = .4277/.4630 | ||||||||
| k = 41 | ||||||||
| N = 8,049 | ||||||||
| Q = 419.39 | ||||||||
| 3. Attitude | r. = .3750 | r. = .5763 | — | |||||
| CI = .3557/.3939 | CI = .5659/.5864 | |||||||
| k = 42 | k = 65 | |||||||
| N = 7,906 | N = 16,421 | |||||||
| Q = 161.38 | Q = 571.04 | |||||||
| 4. Norm | r. = .2524 | r. = .3891 | r. = .4372 | — | ||||
| CI = .2312/.2734 | CI = .3754/.4027 | CI = .4241/.4501 | ||||||
| k = 40 | k = 58 | k = 59 | ||||||
| N = 7,663 | N = 15,102 | N = 14,993 | ||||||
| Q = 156.06 | Q = 512.24 | Q = 232.72 | ||||||
| 5. Σ biei | r. = .3121 | r. = .4132 | r. = .5638 | r. = .3870 | — | |||
| CI = .2893/.3346 | CI = .3995/.4268 | CI = .5530/.5743 | CI = .3726/.4012 | |||||
| k = 23 | k = 40 | k = 55 | k = 34 | |||||
| N = 6,162 | N = 14,226 | N = 15,954 | N = 13,693 | |||||
| Q = 69.29 | Q = 230.50 | Q = 567.78 | Q = 231.30 | |||||
| 6. Σ nbjmj | r. = .2691 | r. = .4075 | r. = .4272 | r. = .4579 | r. = .4267 | — | ||
| CI = .2460/.2920 | CI = .3918/.4229 | CI = .4118/.4425 | CI = .4441/.4715 | CI = .4110/.4422 | ||||
| k = 25 | k = 37 | k = 38 | k = 53 | k = 35 | ||||
| N = 6,307 | N = 11,174 | N = 11,000 | N = 12,895 | N = 10,710 | ||||
| Q = 121.85 | Q = 230.27 | Q = 216.05 | Q = 471.45 | Q = 177.28 | ||||
| 7. Perceived behavioral control | r. = .2450 | r. = .4479 | r. = .4310 | r. = .2691 | r. = .3829 | r. = .2735 | — | |
| CI = .2221/.2676 | CI = .4341/.4615 | CI = .4169/.4450 | CI = .2530/.2851 | CI = .3654/.4002 | CI = .2545/.2923 | |||
| k = 23 | k = 42 | k = 40 | k = 40 | k = 24 | k = 24 | |||
| N = 6,628 | N = 13,991 | N = 12,959 | N = 12,959 | N = 9,315 | N = 9,315 | |||
| Q = 78.65 | Q = 470.23 | Q = 409.27 | Q = 86.81 | Q = 148.32 | Q = 83.63 | |||
| 8. Past behavior | r. = .3392 | r. = .5707 | r. = .4108 | r. = .3111 | r. = .3373 | r. = .3120 | r. = .3426 | — |
| CI = .3174/.3606 | CI = .5595/.5816 | CI = .3956/.4259 | CI = .2947/.3273 | CI = .3210/.3533 | CI = .2951/.3287 | CI = .3262/.3587 | ||
| k = 25 | k = 30 | k = 34 | k = 32 | k = 18 | k = 15 | k = 30 | ||
| N = 6,524 | N = 14,397 | N = 11,652 | N = 11,910 | N = 11,600 | N = 11,081 | N = 11,393 | ||
| Q = 133.74 | Q = 1094.26 | Q = 280.75 | Q = 201.26 | Q = 124.24 | Q = 125.30 | Q = 146.61 |
Note. r. = weighted mean correlation; CI = 95% confidence interval (lower/upper); k = number of studies in each cell; N = total observations of individuals; Q = homogeneity statistic with k − 1 degrees of freedom; Σ biei = sum of Beliefs × Evaluations (indirect attitude); Σ nbjmj = sum of Normative Beliefs × Motivation to Comply (indirect norm). Each mean correlation and Q is statistically significant, p < .0001. We entered unities on the diagonal.