The manipulation of the independent variable
A) should be clearly planned in advance of the data collection.
B) should be evaluated with some type of manipulation check if there is any question about how effective it is.
C) should be pretested to verify that it will work.
D) All of the above
Question 2
A Type II error occurs when we conclude that there is
A) no effect when there actually is no effect.
B) an effect when there actually is no effect.
C) no effect when there actually is one.
D) an effect and there actually is one.
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