Why do researchers use random assignment to place participants into one of two or more groups?
a. To eliminate the effect of the independent variable on the dependent variable.
b. To randomly distribute the presence of potentially influential differences between groups and increase the chance of drawing a causal inference.
c. To make sure that groups in a study are as different as possible at the beginning of the study.
d. To correlate the independent and dependent variables.
B
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What is the term that refers to an individual's ability to understand the meaning of numbers?
a. literacy b. arithmetic c. numerology d. numeracy
Manaka is from Japan, and just won a gold medal at the Olympics. When interviewed about what she thinks contributed to her success, she is most likely to answer
a. "I've just got the right stuff!" b. "My opponents had bad days." c. "I've had so much support from my coach and family." d. "I don't deserve this."