The Pearson correlation between X1 and Y is r = 0.40 and SSY = 100. When a second variable, X2, is added to the regression equation, we obtain R2 = 0.25. How much additional variability is contributed by adding the second variable as a predictor compared to using X1 alone?
A) ?9 points
B) ?15 points
C) ?25 points
D) ?40 points
A
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Paradoxical sleep, marked by high brain activity but no muscle activity, is synonymous with _____ sleep
Fill in the blank(s) with correct word
Signal detection theory predicts all but which of the following? a. Arturro more often notices the aroma wafting from his neighbor's apartment after he has eaten than whenhe is hungry
b. During allergy season, Bettina's sense of smell becomes duller. c. When her stereo is on, Carolyn does not notice an increase in her neighbor's television volume, but, whenshe is reading a book, Carolyn immediately notices the increased volume. d. As he has gotten older, David notices that his sense of taste has diminished. e. Etyda walks the same route every day. Now that the days are getting shorter and part of her walk is in the dark, Etyda notices more sounds that signal possible danger.
Which technique is MOST effective for learning school-related material?
A) elaborative interrogation B) visual imagery mnemonics C) marking important material while reading D) distributed practice
The commonsense view of emotions states that:
a. physiological reactions precede and drive the subjective experience of emotions b. people experience emotions subjectively, which leads to physiological reactions c. physiological reactions and subjective experiences occur together, but they are independent of each other d. the cognitive interpretation or appraisal of physiological reactions drives the subjective experience of emotion