During the first quarter of his freshman year in high school, Dinky received a very low score on a vocabulary test. Three months later Dinky took test again, and he scored much higher on the test. Dinky's improvement can be explained by:
A) maturation
B) regression toward the mean
C) testing effects
D) all of the above (all are good explanations)
Question 2
Regression toward the mean occurs because:
A) measurement is almost always biased in one way or another
B) measurements are usually a mixture of true scores and error
C) no two measurements are ever exactly the same
D) the act of taking a test usually influences people's future scores on the test
(a) With few ticks, moose retain a brown coat; (b) at high numbers of ticks, moose self-groom, destr
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