24 JUL 2011 by ideonexus

 The A not B Task

Emilie sits on her father's lap and excitedly stares at the shiny brass bell that the research assistant across the table is holding. Making sure Emilie is watching, the assistant places the bell into one of two matching wells in the table and then quickly covers both wells with identical cloths. Emilie is eager to grab the bell, as any eight-month-old would, but her father gently holds back her arms while the researcher distracts her with a funny face. After five seconds, Dad is signaled to ...
  1  notes

A number of complex cognitive tasks must come into play and coordinate properly for a child to recognize that an object has been moved from one hiding place to another.