The neuropsychology of facial identity and facial expression in children with mental retardation.
Familiar faces speed up identity but not emotion recognition in kids with mild ID, so teach the two skills separately.
01Research in Context
What this study did
Lennox et al. (2005) tested the kids with mild intellectual disability.
Each child matched photos by identity (same face) or by expression (same feeling).
Half the faces were familiar staff; half were strangers.
The team timed how fast kids made each match.
What they found
Kids were quicker at identity when the face was familiar.
Familiarity gave no speed boost for expression matches.
The pattern matches typical kids—identity and emotion run on separate tracks.
How this fits with other research
Repp et al. (1992) saw worse emotion scores in ID than in mental-age peers.
Hetzroni et al. (2002) also found lower accuracy for fear and anger.
Those papers look like a clash—why did N find normal separation?
The difference is the task: earlier studies asked "What feeling is this?" while N only asked "Do these match?"
Accuracy and processing speed tap different brain paths, so both results can be true.
Together they tell us: kids with ID need extra teaching to name emotions, yet the brain still treats identity and expression as two jobs.
Why it matters
When you run social-skills lessons, teach identity and emotion as separate goals.
First build face-name matching with familiar photos—kids will learn faster.
Next add emotion drills; expect the same effort for happy, sad, or scared even if the face is well known.
Use errorless prompting for naming feelings, because speed alone won’t guarantee correct labels.
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Join Free →Start session with a quick face-name matching game using staff photos, then switch to emotion cards—keep timing and prompting even if faces are the same.
02At a glance
03Original abstract
We indirectly determined how children with mental retardation analyze facial identity and facial expression, and if these analyses of identity and expression were controlled by independent cognitive processes. In a reaction time study, 20 children with mild mental retardation were required to determine if simultaneously presented photographs of pairs of faces were pictures of the same person or of different people (identity matching), or to determine if the pairs of faces showed the same expressions or different expressions (expression matching). Faces of familiar and unfamiliar people were used as stimuli. For identity matching, reaction times were faster for familiar faces than for unfamiliar faces. For expression matching, there was no difference between familiar and unfamiliar faces. These results are consistent with neuropsychological findings from the general population indicating that analyses of facial expressions proceed independently from processes involved in establishing a person's identity. Our results suggest that the basic neuropsychological mechanisms that underlie cognitive processing of facial identity and facial expressions in children with mental retardation may be similar to those of people in the general population.
Research in developmental disabilities, 2005 · doi:10.1016/j.ridd.2004.02.003