Table 2.
Estimates From the Influence-Probability Models
| Variable | Reference model | Reference model + first donation | Reference model + delta | Reference model + response variance | Reference model (social-influence trials only) + computer influence |
|---|---|---|---|---|---|
| Intercept | −0.26 (0.2) | −0.28 (0.2) | −0.24 (0.2) | −1.6*** (0.23) | −0.51** (0.18) |
| Age group | |||||
| Midadolescents | −0.65* (0.25) | −0.65* (0.25) | −0.69** (0.26) | −0.36 (0.24) | −0.26 (0.23) |
| Adults | −1.05*** (0.27) | −1.1*** (0.27) | −1.19*** (0.27) | −0.72** (0.25) | −0.69** (0.24) |
| Source | |||||
| Adults | −0.05 (0.07) | −0.05 (0.07) | −0.05 (0.08) | −0.05 (0.07) | −0.05 (0.07) |
| Computer | −0.48*** (0.08) | −0.48*** (0.08) | −0.49*** (0.08) | −0.49*** (0.08) | |
| Direction of influence: selfish | −0.02 (0.28) | 0.04 (0.28) | −0.04 (0.29) | −0.02 (0.27) | −0.03 (0.27) |
| Midadolescents × Selfish Influence | 0.03 (0.37) | 0.05 (0.37) | 0.02 (0.38) | 0.04 (0.36) | 0.06 (0.36) |
| Adults × Selfish Influence | 0.77† (0.4) | 0.77† (0.4) | 1.06* (0.41) | 0.67† (0.38) | 0.61 (0.38) |
| First donation | −0.07 (0.06) | ||||
| Delta | 0.3*** (0.03) | ||||
| Response variance | 3.18*** (0.34) | ||||
| Computer influence | 0.76*** (0.06) |
Note: Values in parentheses are standard errors. For all control models, see Table S12 in the Supplemental Material available online.
†
p < .10. *p < .05. **p < .01. ***p < .001.