Dr. Taylor is conducting a study to test the effect of a new drug on people's ability to concentrate at work. His research sample consists of 100 US adults. During a 14-week period, half of the sample is administered the drug and the other half is administered a placebo, and participants' concentration abilities are continually tracked. In the context of this study, if Dr. Taylor uses random
assignment, it means that ____.
a. his study will be high in external validity
b. the 100 adults in his study are likely to be representative of the larger population of interest
c. each research participant has an equal chance of being assigned to each level of the independent variable
d. his research findings are likely to be statistically significant
C
Psychology
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The sex glands, which secrete hormones that regulate sexual development and behavior as well as reproduction, are called _________
a) the pancreas b) the gonads c) cortisol d) the hypothalamus
Psychology
The number of items recallable after any short display is called __________
a. visual sensory memory duration b. working memory capacity c. the span of apperception d. articulation span
Psychology