Abstract
The current study examined the role of increased attentional load in 24 month-old children's multistep problem-solving behavior. Children solved an object-based nonspatial working-memory search task, to which a motor component of varying difficulty was added. Significant disruptions in search performance were observed with the introduction of the motor component, but the expected differential interference effects based on task difficulty were largely absent. The primary costs to search performance seem to be incurred as the addition of an intermediate subgoal overtaxes working memory through increased goal-monitoring demands, independent of its difficulty.
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