Which of the following threats to internal validity would be of concern if an outbreak of salmonella in peanut butter occurred while a study was being conducted on perceptions of peanut butter?
A)maturation
B)regression to the mean
C)history
D)placebo

Question

Quizplus · Accepted Answer

The outbreak of salmonella in peanut butter can directly influence participants' perceptions of peanut butter, making it difficult to determine if the participants' responses are due to the study or if they are influenced by the outbreak. This threat is known as history.

Which of the Following Threats to Internal Validity Would Be