Performance During Object Retrieval Tasks in Young Children with and
without Down Syndrome
Abstract
Object retrieval skills requiring means-end exploration are delayed or
impaired in infants with Down Syndrome (DS). The current study examined
the role of ecological constraints, i.e., task difficulty and
environmental context on the object retrieval skills of young children
with DS. Thirteen children with DS (31.55 ± 4.14 months) and 13
mental-age matched Typically Developing (TD) children (17.31 ± 1.64
months) completed three tasks involving retrieving a toy from a
transparent box (task 1), an opaque box (task 2), and a transparent box
hidden inside an opaque box (task 3). Both DS and TD group performed
similarly for the simpler task 1; but for task 2 and task 3, the DS
group had less success rate, fewer use of complex asymmetric hand
actions, and/or longer planning and execution times compared to TD
group. Future studies should examine the developmental trends and
specificity of means-ends exploratory behaviors in children with DS.