A cross-sectional study is one in which

A) the same people are retested over a period of years.
B) different age groups are tested at the same time.
C) different characteristics of a given individual are assessed at the same time.
D) the behavior of a group is assessed by different researchers.

Cross-Sectional Study

A type of observational study that analyzes data from a population, or a representative subset, at a specific point in time.

Different Age Groups

Categories of individuals segmented by their age, often used for demographic, marketing, and social research purposes to identify and analyze behavioral patterns.