Which threat to interval validity is not reduced by the presence of a comparison group?

Name: Which threat to interval validity is not reduced by the presence of a comparison group?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Selection threats to internal validity are not necessarily reduced by the mere presence of a comparison group unless the groups are equivalent, which requires careful matching or random assignment. Selection threats occur when differences between groups (other than the treatment) affect the outcome.

Which Threat to Interval Validity Is Not Reduced by the Presence