TABLE 1.
The Effect of Key Experimental Manipulations on Willingness to Participate (OLS Regression).
| Model 1 |
Model 2 |
|||
|---|---|---|---|---|
| Coefficient | (std. err.) | Coefficient | (std. err.) | |
| Intercept | 8.37*** | (0.16) | 4.98*** | (0.15) |
| Topic | *** | *** | ||
| Sex | −0.99*** | (0.090) | −0.59*** | (0.069) |
| Money | −0.29** | (0.091) | −0.19** | (0.069) |
| Leisure | 0.34*** | (0.090) | 0.26*** | (0.069) |
| Work | – | – | – | – |
| Confidentiality assurance | ||||
| Except as required | −0.0029 | (0.078) | 0.016 | (0.060) |
| Fullest extent | 0.13 | (0.078) | 0.13 | (0.060) |
| Chance of disclosure | – | – | – | – |
| Mention of experience (yes) | −0.034 | (0.064) | −0.012 | (0.049) |
| Age | −0.012*** | (0.0021) | −0.0058*** | (0.0016) |
| Education | ||||
| HS or less | −0.020 | (0.089) | −0.051 | (0.068) |
| Some college | 0.014 | (0.076) | −0.10 | (0.058) |
| College graduate | – | – | – | – |
| Income | * | |||
| <$25K | 0.20* | (0.085) | 0.024 | 0.065 |
| $25K–$49K | 0.21** | (0.076) | 0.038 | 0.058 |
| $50K+ | – | – | – | – |
| Gender (male) | 0.025 | (0.065) | 0.086 | (0.050) |
| Hispanic (yes) | 0.50** | (0.15) | 0.17 | (0.12) |
| Race | ** | |||
| White | – | – | – | – |
| Black | 0.31** | (0.122) | 0.042 | (0.093) |
| Other | −0.22 | (0.134) | −0.13 | (0.10) |
| Perceived risk | −0.023** | (0.0079) | ||
| Personal benefit | 1.40*** | (0.061) | ||
| Societal benefit | 0.42*** | (0.011) | ||
| Risk/benefit ratio | −1.58*** | (0.061) | ||
| Observations | 8,881 | 8,705 | ||
| Model adjusted R2 | 0.034 | 0.443 | ||
*
p < .05
**
p < .01
***
p < .0001