There are a number of methodological strengths of this study, most notably that the authors recruited a matched child
control group, included a control task and used validated emotion recognition materials. However, the materials used were
black and white photographs of faces and may therefore have lacked ecological validity. Additionally, Moore (2001)
highlighted that closer examination of the results revealed that the group of people with ID did not differ from the mental age
matched control group in terms of their ability to rate happy and sad faces. Rather, the group differences were determined by
their ability to rate neutral expressions. Moore (2001) therefore highlighted that the only specific emotion recognition deficit
observed in the study was in terms of rating faces with no emotional content (i.e. neutral expressions).