Early mathematical performance of deaf and hard of hearing toddlers in family-centred early intervention programmes

Research indicates that establishing a strong foundation in early mathematics is essential for later academic learning. Previous research with students who are deaf or hard of hearing (DHH) has shown varying differences in the performance and achievement when compared to typically hearing (TH) students. While the majority of research in this area has been conducted in the United States, studies in other countries suggest that these differences may be global. The present study investigated the early mathematics abilities of 3-year-old DHH children enrolled in family-centred early intervention in the Netherlands. Fifty-three DHH and TH children were given an adapted version of the Early Mathematics Performance Diagnostic. Results showed that on average, the DHH and the TH children performed similarly on all domains, except for Measurement. Likewise, both groups showed similar mathematical knowledge in most early mathematics tasks measuring sub-concepts such as counting objects, shape matching, or measuring weight. Differences were identified in some basic tasks measuring the sub-concepts (e.g. rote counting, measuring time, solving puzzles), however, not on the more advanced tasks measuring these same sub-concepts. These findings are important for parents, teachers, and early interventionists.