A researcher assesses the reading level of third-graders on the first of every month for three months prior to administering a new reading program and for three months following the program. This study is an example of a(n) .

you should think about the answers you give and expect the same form your questions.

i believe the answer is: true

our brain need to reach a certain level of development   before it could interpret and understood sound with high difficulties. to proof this, we just need to pay attention in musical preference between children and adults. it is far less likely that children would enjoy things such as orchestra or rock band as much as adults due to the difference in this ability.