Dr. martin, a psychologist interested in studying children’s memory, gave a memory test to a group of 6-year-olds in 1995 and repeated the tests with the same children in 1998 when they were 9-year-olds. the research strategy used here was the approach.

longitudinal

Explanation:

According to my research on different types of research strategies, I can say that based on the information provided within the question Dr. Martin used a longitudinal approach. This strategy focuses on repeatedly observing a specific aspect or variable over a short or long period of time in different intervals. Which is what Dr. Martin is doing by testing the same group of children with the same test 2 years apart.

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