A Group of Young Adults and a Group of Older

A group of young adults and a group of older adults are instructed to study a list of words and then are given a memory test.The researcher conducting the study finds that,on average,the memory test scores of the older group are lower than the memory test scores of the young group.This study is an example of a _________.

A) true experimental approach
B) correlational approach
C) multi-factor approach
D) quasi-experimental approach