A human-factors psychologist suspects that Keyboard A is designed better and will therefore facilitate a higher words-per-minute rate than Keyboard B or Keyboard C. He tests 10 participants and measures their typing speed using all three keyboards. He counterbalances the order in which participants use the keyboards. Here is part of his SPSS output: Interpret whether sphericity has been violated and what evidence supports your interpretation.
What will be an ideal response?
Ans: Sphericity has not been violated because Mauchly’s test of sphericity is not statistically significant. This means that the variability between groups is not substantially different.
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A. a tendency to experience negative mood states B. simply another term for anxiety C. a tendency to believe negative things about oneself D. a tendency to feel anxious
Mercedes just stubbed her toe on the edge of her bedpost. In response, her brain will most likely signal the release of
a. dopamine. b. pheromones. c. endorphins. d. norepinephrine. e. serotonin.
Research has shown that people who engage in regular aerobic activity show lower blood pressure and heart rate when exposed to situations involving mental stress
Indicate whether the statement is true or false
Which of the following is a risk factor for heart disease that can be modified?
a) age b) heredity c) gender d) high blood pressure (hypertension)