The Adult Developmental Coordination/Dyspraxia Checklist (ADC) in Greek Young Adults: a preliminary reliability study

Developmental Coordination Disorder (DCD) is a neurodevelopmental disorder that affects motor coordination with a negative impact on daily activities. DCD persists from childhood to adulthood in 50–70% of individuals. The present study was a preliminary evaluation of the reliability of the Greek Adult Developmental Coordination Disorders/Dyspraxia Checklist (ADC) version, a self-reported questionnaire to screen adults for probable DCD. One hundred and three (N=103) young adults (aged 19-26), without a previous diagnosis of neurological disorders or disabilities, who completed the Greek version of the ADC checklist twice, with a three-week interval between test-retest measurements. The results showed that Cronbach's alpha values ranged from 0.77 to 0.92 for each of the three subscales and 0.93 for the total ADC scores, indicating a strong internal consistency. Similarly, test-retest reliability results showed intraclass correlation coefficients ranging from 0.63 to 0.87 across each subscale and the total ADC score. Thus, the results revealed acceptable values and moderate to good reliability for the Greek ADC version. In conclusion, given that motor difficulties associated with DCD persist into adulthood and negatively affect motor coordination and daily activities, the Greek ADC version could be a reliable screening tool for identifying probable DCD in young adults. However, further research regarding validity issues in Greek young adults with and without developmental disorders, including DCD, is encouraged.