Professor Cook is conducting a research study on the cognitive abilities of infants and young children. Rather than follow subjects from birth to the age of 10, he assesses small groups from various ages
Of 1-year-olds he measures five children, of 2-year-olds he measures five different children, and so forth. By the time he has completed his study, Dr. Cook has an assessment of 50 different children from 10 different age groups. Which of the following describes the research method that Dr. Cook is using?
a. a cross-sectional design
b. a longitudinal design
c. a quasi-experimental design
d. a semi-reliable design
Answer: A
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