Taking a Broader Perspective: The Problem of External Validity A researcher studying the use of condoms to prevent sexually transmitted disease (STD) combines data from heterosexual and homosexual couples to increase the study's external validity.This pooling of data illustrates
A)aggregation over measures.
B)aggregation over situations.
C)aggregation over subjects.
D)aggregation over trials.

Question

Quizplus · Accepted Answer

Aggregation over subjects refers to combining data from different groups of participants to enhance the generalizability of the findings. In this case, by including both heterosexual and homosexual couples, the researcher is aggregating over different subject groups to increase the external validity of the study.

Taking a Broader Perspective: the Problem of External Validity a Researcher