The general term for the spread of the values around the central tendency is ______________
Fill in the blank(s) with correct word
dispersion or variability
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When Tara was age 6 and in first grade, she described her playmates at school as either good or bad. But now at age 8 and in third grade, she is _______________ in her use of adjectives to describe her peers
a. less precise b. more negative c. more precise d. more positive
An advantage of randomly assigning subjects to groups is that it:
a. makes the groups equal in number b. reduces the chance that other variables will bias the results c. ensures that the best subjects will be assigned to the experimental group d. makes the groups as different as possible from each other
Which of the following may help to protect the brain from the effects of stress? a. cellular migration b. synaptic pruning c. increased levels of neurotrophins
d. neurogenesis
A professional who would study how stress affects the heart is a(n) _____ psychologist
a. environmental b. health c. clinical d. I/O