With respect to the notions of reliability and validity, it can be concluded that
a. if a test is reliable, then it also must be valid.
b. if an experiment is reliable, then it also must be valid.
c. tests or experiments can be reliable without being valid.
d. a test can be reliable without being valid, but not an experiment.
Answer: c. tests or experiments can be reliable without being valid.
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Dominic is eight months old. He sees a toy that he wants to play with, but it is out of reach. He uses the toy in his hand to drag the out-of-reach toy closer. What is Dominic demonstrating?
A) Reflexive behavior B) Coordination of secondary schemes C) Mental representation D) Means-end behavior
In a __________ study, the participants do not know if they are part of the control group or the experimental group. Only the experimenter knows who is in each group
a. placebo b. single-blind c. double-blind d. triple-blind
Protein molecules on the surface of a cell that identify it as native or foreign are __________
Fill in the blank with the appropriate word.
The best way of estimating a child's physical maturity is to use
a. weight. b. height. c. skeletal age. d. head circumference.