Table 2.
Participant characteristics and results of comparisons of Interpersonal Reactivity Index (IRI) results (M = mean and range, SD = standard deviation) between patients with BPD and healthy controls (HC). T-test statistics (t, p, and Cohen’s d) are reported. For the comparison of handedness, Fisher’s exact test was calculated and the p-value (two-sided exact test value) is reported.
| BPD | HC | Test statistics | |||||
|---|---|---|---|---|---|---|---|
| M (range) | SD | M (range) | SD | t | p | Cohen’s d | |
| Age | 26.1 (18–39) | 6.4 | 23.4 (18–48) | 6.2 | 1.28 | 0.207 | 0.41 |
| IQ | 106.6 | 19.6 | 108.6 | 15.5 | −0.36 | 0.722 | 0.11 |
| Handedness (right/left/ambidextrous) | 17/2/1 | 18/1/0 | 1.000 | ||||
| IRI perspective taking | 15.2 | 5.6 | 18.7 | 4.5 | −2.12 | 0.041 | 0.69 |
| IRI fantasy | 20.4 | 5.6 | 19.1 | 4.5 | 0.77 | 0.446 | 0.25 |
| IRI empathic concern | 20.3 | 4.1 | 18.9 | 4.6 | 0.92 | 0.362 | 0.30 |
| IRI personal distress | 21.0 | 5.4 | 10.6 | 3.8 | 6.80 | 0.001 | 2.25 |