Which would be the most likely threat to internal validity for adults' anxiety and depression scores during the decade of 1929-1939, known for the Great Depression?
A) testing effect
B) instrumentation
C) sensitization effect
D) history

Question

Quizplus · Accepted Answer

The most likely threat to internal validity for adults' anxiety and depression scores during the decade of 1929-1939, known for the Great Depression, is history. This is because external events, such as the economic turmoil and societal changes during the Great Depression, could significantly influence participants' anxiety and depression levels, making it difficult to isolate the effects of any experimental manipulation or measurement.

Which Would Be the Most Likely Threat to Internal Validity