A researcher is studying the effect of word games on spelling achievement. Of two randomly assigned groups one receives experience with word games, while the other does not. A spelling test is then administered. This design is
a. counterbalanced.
b. randomized subjects, posttest only control group.
c. a simple 2 x 2 factorial.
d. a static group
Question 2
A test has a score reliability of .70 . This means
a. if the test were administered again, at least .70 percent of the subjects would obtain the same score.
b. the test is 70 percent effective in measuring whatever it does measure.
c. 70 percent of the variance in the observed scores is free of error.
d. 70 percent of the variance in the observed scores is error variance.
A killer whale plays with a ball of ice, soon after a researcher had thrown a snowball at the whale.
Gas Solubility - Effect of pressure
These examples of stimuli were used in the experiment by Vinckier et al. (2007). Mouton is the Frenc
Board games
Music while studying
The Greenhouse Effect: Influences on Temperature