Table 1.
Expectancy and feedback ratings mixed-effects models
| Dependent variable: expectancy ratings | ||||||
|---|---|---|---|---|---|---|
| Model 1a | Model 2a | Model 3a | ||||
| Fixed effects | b | S.E. | b | S.E. | b | S.E. |
| (Intercept) | −0.11 | 0.05 | −0.17 | 0.07 | −0.1 | 0.05 |
| Placebo cue | 0.63*** | 0.04 | 0.63*** | 0.04 | 0.63*** | 0.04 |
| Previous mood rating | 0.01* | 0.02 | −0.01 | 0.03 | 0.02* | 0.02 |
| Placebo cue × previous mood rating | 0.06 | 0.03 | 0.06 | 0.03 | 0.05 | 0.03 |
| vlPFC/dlPFC | 0.01 | 0.05 | ||||
| vlPFC × placebo cue | 0.06 | 0.04 | ||||
| vlPFC × previous mood rating | 0.05* | 0.02 | ||||
| Anhedonia | 0.17* | 0.04 | ||||
| Anhedonia × placebo cue | −0.15*** | 0.04 | ||||
| Anhedonia × previous mood rating | −0.01 | 0.02 | ||||
| Observations | 1218 | 1218 | 1218 | |||
| Akaike Inf. Crit. | 2583.2 | 2578 | 2566 | |||
| Df. | 1221 | 1209 | 1209 | |||
| Dependent variable: mood ratings | ||||||
| Model 1b | Model 2b | Model 3b | ||||
| Fixed effects | b | S.E. | b | S.E. | b | S.E. |
| (Intercept) | −0.03 | 0.04 | −0.02 | 0.04 | −0.02 | 0.04 |
| Placebo cue | 0.12* | 0.06 | 0.11* | 0.05 | 0.11* | 0.06 |
| Expectancy ratings | 0.22*** | 0.04 | 0.23*** | 0.04 | 0.22*** | 0.04 |
| Feedback cue | 0.32*** | 0.02 | 0.32*** | 0.02 | 0.32*** | 0.02 |
| Feedback cue × expectancy ratings | 0.07*** | 0.02 | 0.06*** | 0.02 | 0.06*** | 0.02 |
| vlPFC/dlPFC | 0.05 | 0.03 | ||||
| vlPFC/dlPFC × expectancy ratings | −0.07* | 0.03 | ||||
| vlPFC/dlPFC × feedback cue | 0.2*** | 0.01 | ||||
| Anhedonia | −0.04* | 0.04 | ||||
| Anhedonia × placebo cue | 0.001 | 0.06 | ||||
| Anhedonia × expectancy ratings | −0.07* | 0.03 | ||||
| Anhedonia × feedback cue | 0.05*** | 0.02 | ||||
| Df. | 1228 | 1226 | 1225 | |||
| Observations | 1236 | 1236 | 1236 | |||
| Akaike Inf. Crit. | 3232.6 | 3103.5 | 3222.5 | |||
b estimate, S.E. standard error, Df. degrees of freedom of the residual, vlPFC/dlPFC ventrolateral/dorsolateral prefrontal cortex
*p < 0.05; **p < 0.01; ***p < 0.001