"jean piaget claimed that infants lack object permanence until they are at least 8 months of age; however, alternative tests have indicated that, by months of age, infants at least suspect that objects continue to exist after they have disappeared from view."

Martin, a 32-year-old human relations administrator at a university, believes that all professors over age 50 are incapable of learning the new educational technologies and are content to keep presenting their same "tired, boring" lectures. he often expresses these views to other administrators and does not encourage any of the "older" faculty members to attend professional development meetings related to new teaching approaches nor does he suggest that the university send them to any of the technology conferences. martin is exhibiting