Six-month-old Barbie watches as two dolls are placed behind a screen. When the screen is removed, Barbie sees either two dolls (possible) or one doll (impossible). Which of the following reactions is the infant likely to show?
a. Barbie will not notice any difference between the possible and impossible outcomes, as evidenced by no difference in looking times at the two outcomes.
b. Barbie will look longer at the impossible outcome than the possible outcome.
c. Barbie will look longer at the possible outcome because it is familiar to her.
d. Barbie will not look at either outcome because they will have habituated to the original stimulus.
Question 2
While sitting in her playpen, four-month-old Kiko watches her cat knock a lamp off a dresser. As the lamp begins to fall, Kiko seems to know that the lamp will drop straight to the floor. This knowledge appears to indicate that Kiko instinctively understands
a. Piagetian laws of object permanence.
b. Skinnerian laws of reinforcement.
c. Newtonian laws of object motion.
d. Freudian laws of ego formation.
Balloon angioplasty: (A) deflated balloon catheter is approaching an atherosclerotic plaque; (B) pla
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