The calculational formula for variance differs from the definitional formula because the calculational formula _____
a. does not require the computation of deviation scores
b. uses only raw scores, number of scores, and the mean
c. is more efficient
d. all of these
D
The calculational formula does not require computation of deviations from the mean. It is more efficient because it utilizes only the raw scores, the number of scores, and the mean.
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Using findings from research discussed in the text, describe two strategies that have been tried with some success to address maltreatment of younger children. How are these strategies connected to the risk factors for child maltreatment?
What will be an ideal response?
I obtained a baseline level of John's cooking behavior of 25% of the meals without praise. I then highly praised his cooking behavior, and it increased to 85% of the meals. Later, I stopped praising his cooking, and his behavior began to drop back to its baseline level. What sort of design was I using?
a. Multiple Baseline b. ABA c. Alternating-treatments d. Reversal Replication
Some potentially serious side effects of stimulant drugs prescribed for children with ADHD include all of the following except
a. curbing appetites. c. activating inhibitory circuits. b. disrupting sleep cycles. d. reducing the desire to play.
Sandi believes that people who eat at McDonald's are overweight, so she decides to do a naturalistic observation of people who eat at McDonald's. What should most concern us about Sandi's observations?
a) the placebo effect b) the bystander effect c) observer bias d) participant bias