Cosella is conducting an experiment where she assesses how quickly teenagers can run a 100-meter race after consuming specific amounts of caffeine. She divides her sample up into three groups. Group 1 receives a glass of water with no caffeine added. Group 2 receives a glass of water with an amount of caffeine equivalent to that in one cup of coffee. Group 3 receives a glass of water with an
amount of caffeine equivalent to that in two cups of coffee. Each participant is then timed as they run the course. In this study, the independent variable is
a. the previous running experience of each participant.
b. the teenagers who are being studied.
c. the time it takes to run the 100-meter race.
d. the amount of caffeine being ingested.
d
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Fill in the blank(s) with correct word
Which one of the following is TRUE about computerized adaptive tests?
a. They provide a fuller profile of a person in less time than a traditional test. b. They ensure that each test taker gets different test questions. c. They were first developed at the beginning of the 21st century. d. They can easily be upgraded to a computerized adaptive format.
Feeling like one is fully functioning in a challenging endeavor is the main sign of
a. flow b. wonder c. epiphany d sugar overload
Five-year-old Gemma exclaims, "My brain makes me feel sad or happy!" Which philosopher would agree?
A. Aristotle B. Galen C. Hippocrates D. Plato