In 1999,Hall and Kail investigated age differences in arithmetic performance in 8- to 12-year-olds.Based on the information given,what can you conclude about the type of approach Hall and Kail used? It was

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Hall and Kail investigated age differences in arithmetic performance in 8- to 12-year-olds, which suggests that they used a cross-sectional approach. This means that they measured participants of different ages at the same point in time, rather than following them longitudinally over time or manipulating variables in an experimental design.

In 1999,Hall and Kail Investigated Age Differences in Arithmetic Performance