A scree plot in factor analysis is a plot of:
A. The correlations between variables.
B. Each eigenvalue (Y-axis) against the factor with which it is associated (X-axis).
C. The factor loadings of each variable (Y-axis) onto each factor (X-axis).
D. The regression coefficient of each variable (X-axis) with each factor (Y-axis).
B. Each eigenvalue (Y-axis) against the factor with which it is associated (X-axis).
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The repeated-measures experimental design may lead to ambiguous results
unless a. the subjects are matched on some relevant variable b. the dependent variable is measured only after the introduction of the independent variable c. the alpha error is increased to at least .50 d. there is a separate control group
The firing rates of cells within the locus coeruleus
A) are highest during REM sleep. B) decrease during sleep and increase at awakening. C) are unrelated to behavioral arousal. D) are suppressed by sleeping medications. E) alter EEG cortical arousal.