In the Luo et al. study reportedin the article on object permanence, Now You See It, Now You Don't, the
findings suggest that:
(a) infants knew that objects continued to exist when they were out of sight
(b) infants understood that objects retained their solidity and other physical properties when they were hidden
(c) infants knew that the interactionsbetween physical objects did not change merely because they couldn't be seen
(d) all of the preceding are correct
D
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In order to eliminate the third-variable problem in correlational research, which of the following techniques can a researcher employ?
a. Case studies b. Placebo techniques c. Random assignment d. Matched samples
The developmental psychologist ________ speculated that the underlying temperament of a given society, determined genetically, may predispose people in that society toward a particular philosophy
a) Erikson b) Watson c) Freud d) Kagan