Truly scientific experiments require that participants be ______ assigned to the different experimental conditions
a. selectively c. temporarily
b. sequentially d. randomly
D
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According to Piaget, the sensorimotor stage begins at _____ and ends at about age _____.
A) birth; 4 months B) birth; 2 years C) 2 years; 4 years D) 2 years; 6 years
Complex psychological problems, including addiction to alcohol, are the result of genetic influences as well as environmental influences
Indicate whether this statement is true or false.
Herbert and Harsh compared the behavior of cats that had observed a model perform an act 30 times with cats that had observed only 15 performances. They found that _________
a. the extra 15 observances made no difference b. the first 15 observations had a greater impact than the next 15 c. cats that observed 30 performances did substantially better than those that observed 15 d. cats that observed 15 performances actually did better than those that observed 30
_____ are slender threads inside of a cell's nucleus that carry genes
A) Chromosomes B) Ribosomes C) Golgisomes D) DNA strands