Table 4. Skin Conductance (μS) during the Stressful and Neutral Imagery Conditions.
| PTSD Pairs (P+) | Control Pairs (P-) | Mixed-Model Analysis of Variancea | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| Exposed n=9 | Unexposed n=9 | Exposed n=12 | Unexposed n=12 | Diagnosis | Trauma Exposure | Interaction | ||||||||
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| Measure | Mean | SD | Mean | SD | Mean | SD | Mean | SD | F | P | F | p | F | p |
| Stressful Condition | ||||||||||||||
| Baseline SCL | 4.19 | 4.22 | 3.82 | 1.75 | 3.92 | 2.49 | 3.54 | 2.33 | 0.07 | .788 | 0.27 | .609 | 0.00 | .993 |
| Imagery SCL | 4.17 | 4.31 | 3.97 | 1.75 | 4.03 | 2.51 | 3.68 | 2.26 | 0.05 | .831 | 0.15 | .708 | 0.01 | .918 |
| SCR (Imagery-Baseline) | -0.02 | 0.13 | 0.14 | 0.34 | 0.11 | 0.28 | 0.13 | 0.43 | 0.23 | .638 | 1.50 | .235 | 0.92 | .350 |
|
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| Neutral Condition | ||||||||||||||
| Baseline SCL | 3.94 | 4.09 | 3.73 | 1.79 | 3.64 | 2.37 | 3.10 | 2.13 | 0.23 | .637 | 0.30 | .588 | 0.06 | .810 |
| Imagery SCL | 4.08 | 4.17 | 3.78 | 1.77 | 3.81 | 2.59 | 3.33 | 2.26 | 0.13 | .726 | 0.31 | .583 | 0.02 | .900 |
| SCR (Imagery-Baseline) | 0.15 | 0.14 | 0.05 | 0.11 | 0.18 | 0.32 | 0.23 | 0.30 | 1.83 | .192 | 0.12 | .728 | 1.04 | .320 |
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| Difference Score: Stressful SCR-Neutral SCR | -0.16 | 0.11 | 0.10 | 0.27 | -0.07 | 0.42 | -0.10 | 0.38 | 0.16 | .695 | 2.92 | .104 | 4.53 | .047 |
Significant effects in bold
a
df=1,19
Abbreviations: PTSD, posttraumatic stress disorder; SCL, skin conductance level; SCR, skin conductance response