RP-3 Label each of the following developmental phenomena (i–vi) with the correct cognitive developmental stage: (a)

sensorimotor,

(b) preoperational,

(c) concrete operational, or

(d) formal operational.

i. Thinking about abstract concepts, such as “freedom.”

ii. Enjoying imaginary play (such as dress-up).

iii. Understanding that physical properties stay the same even when objects change form.

iv. Having the ability to reverse math operations.

v. Understanding that something is not gone for good when it disappears from sight, as when Mom “disappears”

behind the shower curtain.

vi. Having difficulty taking another’s point of view (as when blocking someone’s view of the TV).