Table 1.
Multilevel Models Predicting Pupil Dilation from Category, Time of Assessment and Treatment
| Model 1 Category * Time |
Model 2 Category * Time * Treatment |
|||
|---|---|---|---|---|
| Coefficients (± SD) | Coefficients (± SD) | |||
| Random effects | ||||
| Intercept | .43 | .41 | ||
| Assessment | .18 (−.17) | .17 (−.18) | ||
| Treatment | .08 (−.32) | |||
| Coefficients (± SEM) | t-value (df) | Coefficients (± SEM) | t-value (df) | |
| Fixed effects | ||||
| Intercept | 4.53 (.24) | 18.53 (15635) ** | 4.43 (.24) | 18.63 (15629)** |
| Category Bonding | .27 (.01) | 41.76 (15635)** | .29 (.01) | 32.27 (15629)** |
| Category Sexual | .45 (.01) | 68.28 (15635)** | .46 (.01) | 51.25 (15629)** |
| Treatment | .06 (.03) | 2.12 (15629)* | ||
| Assessment | −.04 (.02) | −2.36 (15635)* | .10 (.07) | 1.47 (15629) |
| Stimulus Duration | .00 (.00) | 23.66 (15635)** | .00 (00) | 23.62 (15629)** |
| Gender | −.03 (.09) | −.28 (82) | −.01 (.09) | −.06 (82) |
| Age | −.02 (.01) | −2.36 (82)* | −.02 (.01) | −2.18 (82)* |
| Category Bonding * Assessment | −.06 (.01) | −6.33 (15635)** | −.05 (.01) | −4.02 (15629)** |
| Category Sexual * Assessment | −.68(.01) | −7.74 (15635)** | −.07 (.01) | −5.85 (15629)** |
| Category Bonding * Treatment | −.04 (.01) | −3.22 (15629)** | ||
| Category Sexual * Treatment | −.03 (.01) | −2.57 (15629)** | ||
| Treatment * Assessment | −.28 (.13) | −2.17 (15629)* | ||
| Category Bonding * Treatment * Assessment | −.01 (.02) | −.70 (15629) | ||
| Category Sexual * Treatment * Assessment | .01 (.02) | 0.53 (15629) | ||
| Model fit AIC | 9,035 | 9,031 | ||
| Pseudo R-squared | .733 | .734 | ||
*
p < .05;
**
p < .01.
All estimates calculated by full maximum likelihood. Parameter estimates were calculated with category neutral serving as reference for the other categories; for assessment, 1st session serves as reference; for treatment, placebo serves as reference and for gender, female serves as reference.