Face recognition and emotion perception in boys with fragile-X syndrome.

The team asked boys with fragile-X to look at photos of faces. They wanted to know if the boys could tell who the face was and what emotion it showed.

Each boy was matched with another boy of the same mental age but without fragile-X. This way, any mistakes could be blamed on the syndrome, not on lower IQ.

The fragile-X boys named faces and emotions just as well as their matches. They did not make more errors and they did not need extra time.

In short, once IQ is held steady, fragile-X does not add extra trouble with reading faces or feelings.

Laugeson et al. (2014) looked at almost the same task and got the opposite answer: they saw worse emotion scores and a bias toward seeing negative faces. The key difference is matching. The 1998 paper matched boys by mental age, while the 2014 paper used chronological age. When fragile-X kids are compared with same-age peers, their lower IQ can make them look emotion-blind.

Wynne et al. (1988) first said that social avoidance in fragile-X is driven by anxiety, not by poor face skill. The 1998 null result supports that older idea: the perceptual hardware works; the trouble is later, in the social software.

Fink et al. (2014) and Castelli (2005) found the same pattern in autism—basic emotion recognition is intact once language level is controlled. Together these studies warn us: if a child fails a face test, check IQ and language before assuming a syndrome-specific social deficit.

When you test a child with fragile-X, use mental-age or language-age norms, not grade-age norms. If scores look low, probe anxiety and attention before writing goals for emotion recognition. Target self-regulation or social initiation instead—these boys already know what the face means; they just need help staying calm enough to act on it.