Asocial 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

The use of this particular sample is a threat to "external validity".

External validity is the degree to which consequences of an investigation can be summed up to the world on the loose. Since the objective of research is to educate us regarding the world, outer legitimacy is a critical piece of outlining a study. Threats to external validity are any components inside an investigation that decrease the generalisability of the outcomes.