Which of the following is the best example of a cross-sectional research study?
Select one:
a. Dr. Huang assessed the eye-hand coordination of the second, fourth, and sixth graders of Maple Leaf Elementary School in
September, 2006
b. Dr. Sanchez assessed the eye-hand coordination of the second, fourth, and sixth graders of Maple Leaf Elementary School
in December, 2006, and the same children will be tested again in 2008, 2010, and 2012.
O c. Each year at the beginning of the school year, the five children of the Jones family visit their family doctor to have physical
exams.
d. Each year the five-year-olds of Washington, D. C. are given number and letter proficiency exams before they begin
kindergarten