Dr Ahmandi Is a Developmental Psychologist Who Studies Memory Development

Multiple Choice

Dr. Ahmandi is a developmental psychologist who studies memory development. In one of her research projects she tested memory in a group of five-year-old children. Then she gave the same test to a group of nine-year-olds and compared the results of the two groups to see how memory changes over this time span. This is a type of __________

A) longitudinal study.
B) cross-sectional study.
C) case study.
D) experimental study.