Choose an empirical article from a professional journal where the author(s) describes the purpose, method, and results of a scientific investigation. Some examples of relevant journals in Developmental Psychology are:
Developmental Psychology
Human Development
Merrill-Palmer Quarterly
Child Development
Adolescence
Journal of Youth and Adolescence
Journal of Early Adolescence
Journal of Black Psychology
Developmental Review
Journal of Personality and Social Psychology
Journal of Marriage and the Family
Hispanic Journal of Behavioral Sciences
Death Studies
Note that not all research articles are complicated reading. As a novice, it might help to browse through the journals until you come upon one that is of interest, as well as readable. Students may use one from above