Which of the following is the most critical problem in drawing causal inferences based on the natural groups design?
A. establishing covariation
B. correlating participants' characteristics and their performance
C. eliminating plausible alternative causes for the obtained relationship
D. using the natural groups variable to make predictions for the dependent variable
C. eliminating plausible alternative causes for the obtained relationship
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Having a body mass index (BMI) in the top 15th percentile is called being ______
Fill in the blank with correct word
Malnutrition is associated with lower levels of intelligence than normal
Indicate whether the statement is true or false
The drug formulated in 1912 but not widely used until the 1990s is
A) ?LSD. B) ?THC. C) ?MDMA. D) ?heroin.
Which of the following behaviors would demonstrate language and communication problems displayed by children with autism spectrum disorder?
A. throat clearing and a raspy voice B. pronoun reversals C. speaking in a monotone D. being excessively sociable