Table 1.
Correlation between pupil dilation and BDI-II items.
| BDI-II Item | r-value | BF10 |
|---|---|---|
| Sadness | -0.19 | 1.1 |
| Pessimism | -0.16 | 0.5 |
| Feelings of failure | -0.18 | 0.8 |
| Loss of pleasure | -0.26 | 5.9 |
| Feelings of guilt | -0.03 | 0.1 |
| Feelings of punishment | -0.04 | 0.1 |
| Self-dislike | -0.16 | 0.6 |
| Self-criticism | -0.15 | 0.4 |
| Suicidal thoughts | -0.15 | 0.4 |
| Crying | -0.12 | 0.3 |
| Agitation | -0.09 | 0.2 |
| Loss of interest | -0.15 | 0.4 |
| Indecisiveness | -0.17 | 0.6 |
| Worthlessness | -0.08 | 0.2 |
| Loss of energy | -0.27 | 9.0 |
| Changes in sleeping pattern | -0.11 | 0.2 |
| Irritability | -0.21 | 1.6 |
| Changes in appetite | -0.02 | 0.1 |
| Concentration difficulty | -0.20 | 1.3 |
| Fatigue | -0.19 | 1.0 |
| Loss of sexual interest | -0.25 | 4.9 |
| BDI Anhedonia Score (BDI04, BDI12, BDI21) | -0.26 | 5.9 |
Correlation between pupil dilation and all 21 individual BDI-II items including the commonly computed anhedonia score consisting of the three BDI-II items: loss of pleasure, loss of interest and loss of sexual interest30. Items that show moderate evidence for a correlation, i.e., BF10 > 3 highlighted in bold.