Which of the following statements is true of caffeine?
A. It is a main psychoactive ingredient of smokeless tobacco.
B. It is the most widely used type of depressant drug.
C. It is derived from natural components of plants.
D. It decreases central nervous system activity.
Answer: C
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Any association that was significant as a simple correlation will be significant in a multiple regression equation predicting the same criterion variable
Indicate whether the statement is true or false
Brain differences common to schizophrenia include ____
a. larger than normal cerebral ventricles b. a proliferation of glial cells c. loss of axons between the substantia nigra and the basal ganglia d. a heavier forebrain
If your instructor tells you that the average score on a 10 point test is between 7.5 and 8.5, the instructor has given you the _______________ of the test
a. Real limits b. Apparent limits c. Reliability d. Validity
A gene that only influences the expression of a trait when paired with another less active gene is called __________.
A. recessive B. mutated C. recombinant D. dominant