Before about 9 months of age, how are babies likely to treat a picture of a person or an object?
A) They touch or manipulate the picture in ways that reveal confusion about the picture's real nature.
B) They do not seem to have difficulty distinguishing between the symbol and the referent.
C) They use it as a tool to modify an existing mental representation.
D) They treat it as a symbol.
A
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A measurement that accurately reflects the meaning of a variable is said to have a form of validity called what?
a. external validity b. internal validity c. construct validity d. convergent validity
An instrument that sends sound waves into the mother's abdomen to produce an image of the fetus is called
A) ultrasonography B) amniocentesis C) positron emission tomography D) chorionic villus sampling
Skinner found that if he randomly presented rewards to pigeons in a Skinner box, the pigeons ________
a. refused to eat the food b. ceased all movement until the food pellets were randomly presented for a second time c. developed a series of trial and error behaviors in an attempt to get the reward d. developed a series of superstitious behaviors
Alfred Kinsey is recognized for
A) making sex research a respectable field of academic study and openly discussed. B) the first attempts ever to study any form of human sexual behavior. C) his definitive study of the human sexual response. D) exciting books, exploring the sexual behavior of a variety of individuals.