From: A puzzle form of a non-verbal intelligence test gives significantly higher performance measures in children with severe intellectual disability
Group
N
Age (years) (SD)
RCPM score (SD)
Total
76
8.6 (2.1)
25.6 (6.1)
Book form
38
8.7 (2.1)
25.5 (5.7)
Puzzle form
8.4 (2.1)
25.8 (6.7)