Research Assistant Z is particularly enthusiastic when working with subjects who are receiving SUPER treatment but less animated when working with subjects who are receiving a placebo. Z's actions may introduce what type of internal invalidity into the research on SUPER treatment?
A. history effect
B. treatment misidentification
C. selection bias
D. John Henry effect
B. treatment misidentification
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When a defendant in a criminal case pleads guilty in exchange for concessions from the prosecutor, the case has been resolved by what?
a. civil trial b. peremptory challenge c. unfair application d. plea bargaining
The post of lieutenant governor is present in all of the U.S. states
Indicate whether the statement is true or false
In a study on bruxism (grinding of the teeth), participants recorded for six months the number of times per day they experienced facial pain. The scores ranged from zero to over 200
The best way for a researcher to organize the large number of scores on this variable would be to employ A) An assistant. B) A frequency table. C) A grouped frequency distribution. D) A Wilcoxon matched-pairs signed-rank test
Cruise control spending refers to spending decisions that a. are relatively automatic
b. require voter approval. c. avoid recorded votes. d. depend on the economy.