Table 3.
Correlations between measures, means and standard deviations for non-donors and blood donors
| ND | BD | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | M | SD | M | SD | |
| 1. Impure altruism | 0·83 | 0·19 | 0·38** | 0·17 | 0·52** | 0·24* | 0·01 | 0·17 | 0·14 | 41·54 | 5·79 | 43·87 | 5·17 |
| 2. Self−regarding | 0·04 | 0·83 | 0·15 | 0·17 | 0·34** | 0·08 | 0·00 | 0·09 | 0·07 | 20·67 | 8·83 | 20·47 | 8·49 |
| 3. Kinship | 0·38** | 0·13* | 0·89 | 0·32** | 0·41** | 0·03 | 0·07 | 0·23* | 0·12 | 14·88 | 4·70 | 15·05 | 4·87 |
| 4. Reluctant altruism | 0.19** | 0·37** | 0·28** | 0·64 | 0·29** | 0·28** | 0·17 | 0·27** | 0·16 | 10·44 | 3·78 | 11·71 | 4·37 |
| 5. Egalitarian warm glow | 0·55** | 0·21** | 0·35** | 0·28** | 0·75 | 0·14 | 0·18 | 0·18 | −0·01 | 19·27 | 4·86 | 20·02 | 4·66 |
| 6. Intention | 0·27** | −0·00 | 0·12* | 0·10 | 0·25** | 0·97 | 0·31** | 0·65** | 0·46** | 14·99 | 7·12 | 20·04 | 7·80 |
| 7. Attitude | 0·34** | −0·10 | 0.15** | 0·01 | 0·29** | 0·50** | 0·71 | 0·16 | 0·09 | 16·68 | 4·86 | 19·82 | 4·42 |
| 8. Subjective norm | 0·23** | 0·07 | 0.15** | 0·22** | 0·24** | 0·50** | 0·20** | 0·30 | 0·33** | 8·35 | 2·56 | 9·50 | 2·94 |
| 9. PBC | 0·15* | −0·00 | 0·10 | −0·01 | 0·04 | 0·24** | 0·13* | 0·17** | 0·03 | 10·28 | 2·96 | 11·02 | 3·08 |
* P < 0·05, **P < 0·01.
Cronbach's alpha is shown in bold on the diagonal. Zero-order correlations for non-donors (ND: N = 307) are presented below the diagonal, and correlations for blood donors (BD: N = 103)) are presented above the diagonal. For all scales, higher scores indicate greater endorsement on the construct.