Local History Refers to the Treat to Internal Validity Brought

Multiple Choice

Local history refers to the treat to internal validity brought on when _____.

A) people in the experimental group communicate the treatment with people in the control group
B) researchers compensate the control group as a sort of consolation for not receiving a desirable treatment
C) competition arises between the groups
D) control group members resent being deprived of a desirable treatment
E) an unusual event occurs when one group, but not both are participating in the study