Which of the capacities listed in Table 6.2 indicate that mental representation emerges earlier than Piaget concluded?

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TABLE 6.2 Some Cognitive Attainments of Infancy and Toddlerhood AGE COGNITIVE ATTAINMENTS Birth-1 month Secondary circular reactions using limited motor skills, such as sucking a nipple to gain access to interesting sights and sounds Awareness of object permanence, object solidity, and gravity, as suggested by violation-of-expectation findings; deferred imitation of an adult's facial expression over a short delay (one day) 1-4 months 4-8 months 8-12 months 12-18 months 18 months-2 years Improved knowledge of object properties and basic numerical knowledge, as suggested by violation-of-expectation findings; deferred imitation of an adult's novel actions on objects over a short delay (one to three days) Improved anticipation of events (such as parent's departure) and efforts to change those events; ability to search for a hidden object when covered by a cloth Ability to search for a hidden object when it is moved from one location to another (accurate A-B search); deferred imitation of an adult's novel actions on objects after long delays (at least several months) and across a change in context (from child care to home); rational imitation, inferring the model's intentions; displaced reference of words Ability to find an object moved while out of sight (invisible displacement); deferred imitation of actions an adult tries to produce, even if these are not fully realized; beginnings of make-believe play; ability to mentally represent the solution to a problem, in using an unfamiliar tool to secure an object; increasing awareness of pictures and video as symbols of reality