Developmental milestones are tasks, abilities, and functional skills that a child should be able to demonstrate within a specific age-range.These milestones cover gross and fine motor skills, language development, cognitive abilities, and social skills. When a child does not seem to reach several developmental milestones, the child may have special needs. Of course, every child is unique and failing to perform a particular task does not automatically mean the presence of a learning disability. This is why the Battelle Developmental Inventory (BDI) can be used to assess all children, with or without special needs.
Two types of Battelle Developmental Inventory tests are being utilized in the field of special education testing. These are the Screening Test and the Complete Second Edition Test. Both types assess major developmental skills, but the former is shorter while the latter is more intensive.