Maria believes that high doses of caffeine speed up a person's reaction time. In order to test her hunch, she has five friends each drink three 8-ounce cups of coffee and then measures how quickly they are able to push a button when a tone is sounded. What is wrong with Maria's research strategy?
A) No independent variable has been specified.
B) No dependent variable has been specified.
C) There is no control condition.
D) There is no provision for repeating the experiment.
Answer: C) There is no control condition.
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Renee is concerned because her son is 13 months old and is starting to walk, but he never learned to crawl. What advice would you give to Renee?
She should not be concerned because not all babies crawl. She should not let her son continue to walk until he has learned to crawl. She should see her pediatrician because this may be a sign of a learning deficit. She should wait another month or so to see if he crawls and walks at the same time.
If we calculate a correlation coefficient and we find that there is a relationship between the two variables, we
a. know that the data must be interval or ratio. b. know, without referring to the study, that a correlational design was used. c. can conclude that changes in one variable cause changes in the other variable. d. cannot conclude that changes in one variable cause changes in the other variable.
Tanina views herself as curious and exacting, and she enjoys science greatly. According to Holland, what is Tanina's personality type?
A) Investigative B) Realistic C) Enterprising D) Conventional
Young people’s vocational aspirations correlate strongly with their __________
A) parents’ jobs B) childhood dreams C) ethnic identity D) friends’ aspirations