. Author manuscript; available in PMC: 2010 Apr 30.

Published in final edited form as: Psychiatry Res. 2009 Mar 10;166(2-3):260–268. doi: 10.1016/j.psychres.2008.02.008

Table 3.

Changes in affect from before to after self-injury

Type of Affect	Cohen’s d^a	Correlation with Frequency of Skin-Cutting^b
Individual Affect-States Showing Greatest Change
Relieved	2.25	.31
Calm	1.39	.10
Satisfied	1.24	.47
Relaxed	1.21	.33
Overwhelmed	−0.89	−.39
Changes in Affect-States
Grouped by Valence and Arousal^c
Negative Valence, High Arousal	−0.36	−.43
Negative Valence, Low Arousal	−0.19	−.21
Positive Valence, High Arousal	0.55	.07
Positive Valence, Low Arousal	1.92	.40

Cohen’s d values indicate the magnitude of change in affect-states from before to after self-injury. Negative values indicate that the affect-state decreased from before to after self-injury. All Cohen’s d values in this table are statistically significant at an alpha level of .001, except for the value of −0.19 which has a p-value of .02. Cohen’s d values above 0.8 are generally considered large, between 0.2 and 0.8 moderate, and below 0.2 small.

Correlations were computed between changes in affect and lifetime number of skin-cutting episodes. The number of lifetime cutting episodes was rank-transformed for these calculations because this variable was not distributed normally. Correlations of .31 and .40 were statistically significant at alpha levels of .05 and .01, respectively.