Recent research suggests that humans can discriminate about _______ odors
a. one hundred
b. one thousand
c. one million
d. one trillion
D
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A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment. If all the participants show improved performance of 8 or 9 points after treatment, what should the researcher find?
a. The sample mean difference is near zero. b. The t statistic is near zero. c. The variance of the difference scores is near zero. d. None of the other options is correct.
______ is the most commonly reported measure of central tendency.
A. Mean B. Median C. Mode D. Central tendency
What is the current status of the bottleneck theory of attention?
a. It is relatively accurate in explaining the functions of the executive attention network. b. It explains auditory attention, but not visual attention. c. It explains attention patterns in children, but not in adults. d. It is not flexible enough to explain human attention.
The overriding goal of Head Start compensatory preschools has been to
a. provide employment to teachers. b. prepare low-income children for elementary school. c. boost minority children's IQ scores with intensive help. d. boost minority children's IQ scores with effective teaching.