Measuring the height of the same group of children every year for three years is an example of a between-subjects design.

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Measuring the height of the same group of children every year for three years is an example of a within-subjects design, as the same group of children is being measured repeatedly over time. A between-subjects design would involve measuring different groups of children (e.g. one group receives a new treatment, while another group does not) and comparing their outcomes.

Measuring the Height of the Same Group of Children Every