Dr. Kaiser, a sports psychologist, wants to know if he can improve the cardiovascular endurance in elementary school children. He is allowed to study two physical education classes at a local school, one boys' class and one girls' class. On the pretest, the girls on average have slightly better cardiovascular endurance as measured on the step test. He administers the year- long aerobic program to the girls' class. The posttests revealed that the girls' cardiovascular endurance improved much more than the boys.' Dr. Kaiser must now decide if the program really worked or

Question

Quizplus · Accepted Answer

Dr. Kaiser's study likely experienced a selection-maturation effect because the two groups (boys and girls) were inherently different at the start (girls had slightly better cardiovascular endurance), and these initial differences could have contributed to the observed outcomes, rather than the aerobic program itself.

Dr Kaiser, a Sports Psychologist, Wants to Know If He