Describe what is measured by the mean and what is measured by the standard deviation for a set of scores. Describe the set of scores in a sample with a mean of M = 40 and a standard deviation of SD = 4 . (Where are most of the scores located? Where are they centered? What range of values do they cover?)
What will be an ideal response?
The ________________ is the sum of all the scores divided by the number of scores.
a. median
b. mean
c. mode
d. standard deviation
Describe the general purpose for descriptive statistical techniques and for inferential statistical techniques.
What will be an ideal response?
The two properties about a set of measurements of a dependent variable that we are most interested in describing are
a. frequency and average.
b. average and correlation.
c. central tendency and dispersion.
d. histograms and polygons.
Without some correction, the percentage of agreement between two observers will tend to overestimate the true level of inter-rater reliability.
a. True
b. False
Indicate whether the statement is true or false
Which of the following is true of behaviorism?
a. Behaviorism had very little impact on scientific psychology.
b. Behaviorists considered mental events such as consciousness and imagery to be the appropriate focus of psychological research.
c. Behaviorism has been a major influence in experimental psychology.
d. A behaviorist established the first laboratory of experimental psychology.
One concern with measuring split-half reliability is that many different correlations are possible depending on how you decide to split the test items in half.
a. True
b. False
Indicate whether the statement is true or false
Functional magnetic resonance imaging (fMRI) refers to
a. a method of studying form perception.
b. a method commonly used in human factors research.
c. measurement of the electrical activity of the brain using electrodes placed on the scalp.
d. measurement of blood flow and oxygenation in response to a specific cognitive activity.
Without some correction, such as the Spearman-Brown formula, a correlation measuring split-half reliability will tend to overestimate the reliability for the full test.
a. True
b. False
Indicate whether the statement is true or false
Parallel distributed processing (PDP) refers to
a. an early method for measuring reaction time.
b. the use of fMRI to study brain activity.
c. a modern model of cognition.
d. a method of statistical analysis.
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