In cultures in which babies are held or carried around much of the day, __________.
A. prolonged episodes of crying are common
B. prolonged episodes of crying are rare
C. they cry because infants need time alone
D. they cry because they sense that their mothers are frustrated with them
Answer: B
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Ricardo wants to study the academic performance of graduate students in the United States. First, he decides that he will study schools in only 15 states and randomly selects those states. He then randomly selects 30 schools from these 15 states. Over a period of 3 months, Ricardo travels to these 30 schools and studies the academic performance of their students. Identify the sampling technique used by Ricardo in this scenario.
What will be an ideal response?
In a double-blind experiment, who knows what condition the participant is in?
a. both the experimenter and the participant b. neither the experimenter nor the participant c. only the experimenter d. only the participant
Which of the following is a symptom of rheumatoid arthritis?
A. poor cognitive functioning B. inflammation C. poor vision D. nausea
The two-factor ______ design involves two independent variables with independent groups of subjects in all conditions.
a. between groups b. within groups c. between-subjects d. within-subjects