A social psychologist wants to study the impact of listening to classical music on people's level of comfort in social interactions. She runs a study using a convenience sample of college undergraduates. The use of this particular sample is a threat to:______
a. mundane realism
b. experimental realism
c. interrater reliability
d. external validity
External validity refers to the extent to which the conclusions from your research study can be generalized to other situations, groups or events outside your study.
