A researcher is interested in examining the development and effects of shyness. To do this, she identifies a group of 100 shy children-50 eight-year-olds and 50 ten-year-olds. She takes various measures of shyness and compares the two groups. This design is best described as

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The design is cross-sectional because it compares different age groups (eight-year-olds and ten-year-olds) at a single point in time to examine differences in shyness.

A Researcher Is Interested in Examining the Development and Effects