Two or more identical pairs of scores can be identified on a scatter diagram by __________
Fill in the blanks with correct word
a number in lieu of a dot; two dots next to one another (preferably touching)
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Compared to an independent-measures design, a repeated-measures study is more likely to find a significant effect because it reduces the contribution of variance due to ______
a. time-related factors c. the effect of the treatment b. order effects d. individual differences
When Simon LeVay compared the autopsied brains of homosexual and heterosexual men, he discovered a cluster of neurons in the substantia nigra that was consistently larger in men with a homosexual orientation
Indicate whether the statement is true or false
Dr. Caster decides to perform an experiment investigating the effects of caffeine and sugar on motor skill performance. He randomly assigns his subjects to one of four groups: high caffeine/high sugar, high caffeine/no sugar, no caffeine/high sugar, no caffeine/no sugar. People in each group are given a soft drink containing the appropriate levels of sugar and caffeine, and then tested on a
mirror tracing task. Dr. Caster finds that the people in two of the groups (the high caffeine/high sugar and the no caffeine/no sugar) perform at about the same high level, while the other two groups (the no caffeine/high sugar and high caffeine/no sugar) perform at about the same poor level. Dr. Caster's results show a. a main effect of caffeine b. a main effect of sugar c. a synergistic interaction d. an antagonistic interaction
According to Perry, reflective judgment begins to develop for most people ____
a. in their early teens b. around age 30 c. around age 20 d. in their late 20s