“…in the initial screening had proved problematic in other countries (Durkin et al, 1994;Zaman et al, 1990), while the next stage assumed the existence of an extensive corpus of trained professionals, such as psychologists, developmental paediatricians, audiologists, optometrists, and so forth, who could conduct sophisticated assessments, using culturally appropriate tools. In his study of the reliability of an easy-to-use developmental milestone chart to identify children with development delays in Cambodia modified from screening tools used in the West, Scherzer (2009) noted that what constitutes "delay" in one culture may not in another and recommended the need for more accurate, locally identified milestones. With services for children with disabilities being mainly in Phnom Penh and in some provincial capitals, assessments as the survey envisioned would either involve huge numbers of children coming to these centres or "mobile crews" of trained professionals following the survey enumerators.…”