ResultsĮye tracking results reveal that children with SCT show lower proportion fixation duration on faces already from the age of 3 years, compared to children without SCT. Recruitment and assessment took place in the Netherlands and the USA. Affect recognition was measured using the subtest Affect Recognition of the NEPSY-II neuropsychological test battery. Eye gaze patterns to faces were measured using an eye tracking method that quantifies first fixations and fixation durations on eyes of static faces and fixation durations on eyes and faces in a dynamic paradigm (with two conditions: single face and multiple faces). MethodsĪ group of 101 children with SCT (aged 1–7 years old M age= 3.7 years) was included in this study, as well as a population-based sample of 98 children without SCT (M age= 3.7). This international cross-sectional study was designed to investigate gaze towards faces and affect recognition during early life of children with SCT, with the aim to find indicators for support and treatment. About 1:650–1000 children are born with an extra X or Y chromosome (47,XXX 47,XXY 47,XYY), which results in a sex chromosome trisomy (SCT).
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