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  • 19-01-2024
  • Social Studies
contestada

In 2003, Dr. Martinez gave a single vocabulary test to groups of children in grades 1, 3, 5, and 7. The results were then compared to investigate vocabulary growth. Dr. Martinez's study uses a (an)____________ research design:
a) Experimental
b) Cross-sectional
c) Longitudinal
d) Descriptive

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