Background: Cleft lip and palate is a craniofacial congenital defects. Most syndromes with facial clefts have intellectual
disability. However, both types of cleft are commonly associated with intellectual , speech and language disorders.
Objective: To determine the intellectual function and learning disorder of the selected 10 school- age children with cleft lip and
palate living in Khon Kaen province, Thailand,
Material and Method: The standard IQ test (Wechsler Intelligence Scale for Children – 3rd edition ) and learning achievement test by Wide Range Achievement Test-Thai version (WRAT-Thai) were performed in the 10 Children with cleft lip and palate aged between 6-12 years at Srinagarind Hospital.
Results: Mean IQ score of participants was 90.5, (SD =11.2). One case had IQ score below normal range (IQ=63) and meet
criteria of intellectual disorder. Three cases met criteria of leaning disorder.
Conclusion: The majority of children with cleft lip and palate had average IQ. 1/10 had intellectual disorder and three of them had learning disorder.

Keywords: Cleft lip and palates, intelligence, intellectual disabilities disorder, learning disorder