Which of the following is a rhythm that tends to occur over a 90 minute period?
A) a single non-REM/REM sleep cycle
B) heart rate rhythm
C) stomach motility rhythm
D) smoking rhythm
E) menstrual cycle
Answer: A
Rationale: Heart rate rhythms tend to vary over a 90 minute period.
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Ilesha administers a mechanical ability test, a test in which individuals are asked to examine an image of gears and identify in which direction a certain gear should rotate if another gear is turned, Ilesha is administering a:
A) general cognitive ability test. B) specific cognitive ability test. C) performance test. D) psychomotor test.
When are negative results important?
a) When questions are raised about the ethics of an investigation b) When questions are raised about the use of costly treatments c) When questions are raised about the importance of a treatment d) When questions are raised about the generality of findings