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Raven’s Coloured Progressive Matrices: A useful tool to
match adults with Down syndrome and controls? Claudio Straccia and Koviljka Barisnikov
Child Clinical Neuropsychology Unit, Department of Psychology, University of Geneva, Switzerland
Corresponding author: Claudio Straccia, Child Clinical Neuropsychology Unit, University of Geneva, Uni Mail – 6164, CH-1211 Geneva 4, Switzerland, Phone +41 22 379 89 93, Fax +41 22 379 93 59 e-mail: [email protected].
Background Studies on behavioural phenotypes often match participants on their cognitive abilities
Since persons with Down syndrome (DS) commonly present relatively preserved non-verbal reasoning
abilities associated to larger difficulties in verbal skills, general IQ is not an adequate matching variable
This cognitive dissociation is better controlled by matching participants on a non-verbal reasoning task and
by statistically controlling the influence of verbal skills (Straccia, et al., 2014)
The Raven’s Coloured Progressive Matrices (CPM, Raven et al., 1998) is often used to match participants with
DS to controls
While several studies suggest that children with DS present a specific error pattern (Gunn & Jarrold, 2004), other
studies find inconsistent results (Facon & Nuchadee, 2010)
Aim Since no studies have analyzed this
topic among adults with DS, we aim to
examine the usefulness of the CPM in
matching adults with and without DS
Participants: 48 adults with DS and 184 adults
with non-specific ID (NS) took part in the study
Material: the CPM is a non-verbal reasoning task
in which participant have to choose the piece
which correctly complete the presented pattern
(36 items, Cf. Figure 1)
Matching: the analyses were firstly conducted on
the two complete group and secondly by
individually matching participants with DS and NS
on the CPM raw score
Results: all participants (I) Results: matched groups (II)
0
10
20
30
40
50
60
70
Error A Error B Error C Error D
% o
f e
rro
rs
Error Analysis (I)
NS
SD
Figure 1. CPM item example
Figure 2. Items analysis formula
0
10
20
30
40
50
60
Error A Error B Error C Error D
% o
f e
rro
rs
Error Analysis (II)
NS
SD
Figure 3. Error analysis of the complete groups Figure 5. Error analysis of the matched groups
Figure 4. Items analysis of the complete groups Figure 6. Items analysis of the matched groups
Results (III) and Discussion
References
Error Analysis: the CPM provides four types of
error. We compared the two groups on the
proportions of each type of error
Items Analysis: this method consists in
computing a delta (Di) score for each item and a
principal axis (y = ax + b, Cf. Figure 2). A
difference greater than 1.5 delta units between
the principal axis and a delta point indicates a
significant differential functioning between the two
groups for a given item
Error A. Difference: The piece has no figure of any kind on it; the
figure shown is quiet irrelevant
Error B. Inadequate Individuation: The figure is contaminated by
irrelevancies or distortions; it combines figures irrelevantly; it is
whole or half the pattern to be completed
Error C. Repetition of the Pattern: Above and to the left,
immediately above or immediately to the left of the space to be
filled
Error D. Incomplete Correlate. The figure is wrongly oriented; it is
incomplete, but correct as far as it goes
Facon, B., & Nuchadee, M.-L. (2010). An item analysis of Raven's Colored Progressive Matrices among participants with Down syndrome. Research in Developmental Disabilities, 31(1), 243-249. doi: 10.1016/j.ridd.2009.09.011
Gunn, D. M., & Jarrold, C. (2004). Raven's matrices performance in Down syndrome: Evidence of unusual errors. Research in Developmental Disabilities, 25(5), 443-457. doi: 10.1016/j.ridd.2003.07.004
Raven, J. C., Court, J. H., & Raven, J. (1998). Progressive matrices - Colour. Oxford, UK: Psychologist Press.
Straccia, C., Baggio, S., & Barisnikov, K. (2014). Mental Illness, Behavior Problems, and Social Behavior in Adults With Down Syndrome. Journal of Mental Health Research in Intellectual Disabilities, 7(1), 74-90.
doi:10.1080/19315864.2012.741660
Comparing means: The adults with NS showed higher scores than the
adults with DS (t(98) = 3.545, p = .001)
Error Analysis: The two groups did not show any difference in the error
pattern, neither in matched nor in no matched conditions (Figures 3 and 5)
Items Analysis: The group with DS showed more difficulties to complete all
items, although this difference was not significant (< 1.5 delta units, Figure 4)
Items Analysis: In the matched conditions, the CPM items were equally
distributed close to the principal axis (Figure 6)
Inconsistent with Gunn & Jarrold (2004) findings, adults with DS presented
the same error pattern as their counter parts with NS
The Items Analysis results were consistent with previous studies (e.g. Facon
& Nuchadee, 2010), confirming that the items difficulty was equal in the two
groups and that it depended on global performance
Thus we can state that the CPM global score can be trustfully used to match
adults with DS and controls