Situation in which some aspects of the culture change less rapidly, or lag behind, other aspects of the same culture.

Answer is: cultural lag.
Cultural lag occurs when the non material culture is can not adapt a new material conditions, for example period of adjustment to new technologies. Cultural lag common phenomenon because material culture evolve and change rapidly. Cultural lag creates problems in a society.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .