A researcher has children watch 30 minutes of violent television and then measures their aggressiveness.The researcher concludes that television violence causes aggressiveness.A problem here is that
A) there is no control group.
B) the aggression measure is unreliable.
C) the researcher should have had the children watch at least 60 minutes of violent television.
D) the measurement tool is not valid.
Correct Answer:
Verified
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