| Term 
 | Definition 
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        | Term 
 
        | simultaneous multiple attention (definition) |  | Definition 
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        | Term 
 | Definition 
 
        | Incoordination and unsteadiness due to the brain's failure to regulate the body's posture and regulate the strength and direction of limb movements. |  | 
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        | Term 
 
        | implicit memory (definition) |  | Definition 
 
        | an inability to recall details of memory such as when, where, and from whom they learned it |  | 
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        | Term 
 
        | Figure-ground discrimination (definition) |  | Definition 
 
        | involves the differentiation between foreground and background forms and objects |  | 
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        | Term 
 | Definition 
 
        | responding to environmental challenges as they occur |  | 
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        | Term 
 
        | mental schemes (definition) |  | Definition 
 
        | organizing experiences into concepts |  | 
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        | Term 
 | Definition 
 
        | the cognitive methods used by the child to organize schemes and experiences to direct subsequent actions |  | 
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        | Term 
 | Definition 
 
        | the balance between what the child knows and can act on and what the environment provides |  | 
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        | Term 
 
        | assimilation (definition) |  | Definition 
 
        | the ability to take a new situation and change it to match an existing scheme or generalization |  | 
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        | Term 
 
        | accommodation (definition) |  | Definition 
 
        | the development of a new scheme in response to the reality of a situation or discrimination |  | 
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        | Term 
 
        | primary circular reactions (definition) |  | Definition 
 
        | child learns about cause and effect as a result of reflexive sensorimotor patterns that are repeated for enjoyment (2 to 4 months according to Piaget) |  | 
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        | Term 
 
        | secondary circular reactions (definition) |  | Definition 
 
        | voluntary movement patterns emerge due to coordination of vision and hand function, and an early awareness of cause and effect development (5 to 8 months according to Piaget) |  | 
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        | Term 
 
        | coordination of secondary schemata (definition) |  | Definition 
 
        | voluntary movement in response to stimuli that cannot be seen such as in object permanence, and early development of decentered thought (9 to 12 months accordin |  | 
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        | Term 
 | Definition 
 
        | the weakening of the body at a gradual but steady pace during the last stages of adulthood through death |  | 
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        | Term 
 
        | gyral atrophy (definition) |  | Definition 
 
        | narrowing and flattening of gyri with widening of sulci |  | 
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        | Term 
 | Definition 
 
        | congenitally missing extremity |  | 
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