Amphetamines, cocaine, caffeine, and nicotine are classified as ______
a. hallucinogens c. stimulants
b. catatonics d. depressants
C
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Which of the following is a method used to minimize the impact of observer influence on the behavior of research participants?
a. Spending time in the setting before collecting data b. Paying participants for their time c. Asking participants to behave as they typically would d. Wearing dark glasses
At about 18 month of age, most children experience
a. stuttering. b. constructing their first sentence. c. a word spurt. d. mastery of all vowels and most consonants.
Which of the following are rod-shaped and paired structures made of DNA that are located in the nucleus of a cell?
a. Chromosomes b. Genomes c. Genes d. Genetic markers
Dr. Manquero forms the hypothesis that ingesting chocolate prior to an exam will improve exam performance. She gives half of her participants chocolate and the other half gum. She then gives the participants an exam. In this experiment, what is the best way to divide the participants into groups?
a. Make sure that each group wants to eat the chocolate or chew the gum. b. How the groups are formed doesn't matter. c. Have all males in one group and all females in the other. d. Use random assignment.