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. Author manuscript; available in PMC: 2007 May 10.
Published in final edited form as: Psychol Med. 2005 Oct 5;36(1):91–97. doi: 10.1017/S0033291705006124

Table 2.

Visuospatial task measures

Variable OCD (n=20)
Mean (s.d.)		 Trichotillomania (n=17)
Mean (s.d.)		 Controls (n=20)
Mean (s.d.)		 F(2, 54)
Stage 1 (practice stage)
 Novel sequences generated (max. 24) 15·00 (2·50) 15·50 (3·70) 13·50 (4·70) 1·47
 Consecutive perseverations  1·00 (2·50)  1·40 (2·60)  3·20 (6·30) 2·04
Stage 2 (novel sequence generation)
 Baseline span score  8·70 (2·80) 10·60 (6·10)  8·40 (5·50) 0·93
 Novel sequences generated (max. 24) 17·10 (2·00) 17·10 (3·30) 17·20 (3·30) 0·00
 Strategy use (max. 4)  0·20 (0·90)  0·40 (0·70)  0·60 (1·20) 0·79
 Consecutive perseverations  0·30 (0·60)   0·20 (90·60)  0·20 (0·40) 0·16
Stage 3 (strategy training)
 Novel sequences generated (max. 24) 19·50 (2·10) 20·00 (2·20) 20·70 (2·90) 1·09
Stage 4 (novel sequence generation)
 Novel sequences generated (max. 24) 18·10 (3·20) 21·50 (2·80) 21·00 (3·70) 5·09**
 Strategy use (max. 4)  1·10 (1·60)  2·90 (1·40)  2·70 (1·70) 6·74**
 Consecutive perseverations  0·90 (1·00)  0·30 (0·80)  0·40 (0·70) 2·65

Significant group differences overall:

**

p<0·01.