Research participants who carefully observe and report their immediate reactions and feelings in response to different musical sounds are using the method known as

answer; the above statement is ( false );

answer; protecting domestic national security; i believe this is correct,plz check first,good luck;

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.