Seven-year-old George, who possesses average academic abilities, is problematic in class. He disturbs other children while they study. He has irregular sleep patterns. He shows no interest in activities that require concentration. In this scenario, George is most likely suffering from _____.
A. autism
B. dyslexia
C. Asperger's disorder
D. attention deficit/hyperactivity disorder
Answer: D
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One of the reasons that researchers will often use an existing questionnaire rather than designing their own is
a. To minimize history as a threat to internal validity b. In situations where the purpose of the questionnaire is poorly defined c. To be able to compare their results to others who have used the survey d. In situations where the variables of interest are unclear
Complaints of joint and muscle pain among seniors may result from age-related a. increases in REM sleep
b. decreases in REM sleep. c. increases in NREM sleep. d. decreases in NREM sleep.
PET scans were made possible by the development of
A. the gamma camera. B. x-rays. C. powerful magnets. D. histology techniques.
H1 and H0, taken together, cover the entire continuum with regard to possible effects of the independent variable
Indicate whether the statement is true or false