Reasoning and Rehabilitation cognitive skills programme for mentally disordered offenders: Predictors of outcome

Table 2 Differences in the baseline scores of completers and non-completers on the Maudsley Violence Questionnaire, Social Problem-Solving Inventory-Revised Short, Novaco Anger Scale and Provocation Inventory, Locus of Control Scale and: Disruptive Behaviour and Social Problem Scale

	Completers Mean (SD) (n)	Non-completers Mean (SD) (n)	t value (df)	Cohen’s d
MVQ (total)	15.8 (12.2) (76)	17.4 (13.3) (21)	-0.52 (95)	0.05
SPSI-RS	11.8 (3.0) (76)	12.6 (3.3) (21)	-1.15 (95)	0.22
NAS-PI	81.0 (19.9) (76)	80.3 (18.4) (21)	0.14 (95)	0.01
LoC	16.77 (5.4) (52)	13.93 (4.4) (15)	1.85 (65)	0.57
DBSP	35.2 (11.4) (63)	43.1 (14.6) (15)	-2.27 (76)1	0.60

¹P < 0.05. MVQ: Maudsley Violence Questionnaire; DBSP: Disruptive behaviour and social problem scale; NAS-PI: Novaco Anger Scale and Provocation Inventory; LoC: Locus of Control Scale; SPSI-RS: Social problem-solving inventory-revised short.