Jones administered a memory test to a single group of children when they were two and four years old,and she is planning to give the test to the children a third time when they are six years of age.Dr.Jones is conducting a

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A longitudinal study involves observing the same group of participants over a period of time (in this case, from age 2 to age 6). This type of study is ideal for studying developmental changes over time and allows researchers to make comparisons within the same group of participants. In contrast, a cross-sectional study involves studying different groups of participants at different ages, while a sequential study involves studying different groups of participants at different times but at the same age. A chronological study is not a recognized research design in developmental psychology.

Jones Administered a Memory Test to a Single Group of Children