|] Question 9 2 out of 2 point: Identify the specied elements of the experiment. A researcher wants to investigate whether different amounts of exercise can be used to increase the attention span of children who have been diagnosed with ADHD. A group of 45 children aged 6-12 who have been diagnosed with ADHD are randomly selected to participate in the study. The children are eyaluated at the beginning of the study; and their attention span is measured. The children are then randomly assigned to one of three exercise groups. The rst group will not engage in any exercise outside of their typical daily routine. The second group will attend an exercise class after school 3 days a week {moderate activity}. The third group will attend a more strenuous exercise class every day after school as well as Saturday afternoon [strenuous]. At the end of a six week: period the students will be re-eyaluated and their attention spans remeasured. Identify the treatments