By age 16, about _____ of American adolescents have experienced sexual intercourse
A) one in ten
B) one quarter
C) one half
D) three quarters
Answer: B
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The biochemical basis of genetic information is the DNA molecule
a. True b. False Indicate whether the statement is true or false
Mental categories allow us to __________
a. predict the ways in which we should interact with new instances b. spend more time trying to figure out what things are c. find the needle in the haystack d. overcome our biases and prejudices derived from stereotypes
In an experiment, the behavior that is expected to be affected by some manipulation is called the ______ variable
a. random b. extraneous c. independent d. dependent
The Piagetian approach focuses on
A. quantitative differences in intelligence. B. establishing norms for intelligence tests. C. qualitative changes in cognition. D. the relationship of brain development to speed and function.