One can optimize and strengthen the power of a statistical test in all of the following ways, EXCEPT
A. by using stronger treatments to drive the means of the groups farther apart
B. by decreasing the effect size of the study
C. by decreasing the variability within groups
D. by increasing the total size of the study
Answer: B. by decreasing the effect size of the study
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During the embryonic stage, the zygote travels to the uterus and becomes implanted
a. True b. False Indicate whether the statement is true or false
Jenna is serving on a jury. A witness has just identified the defendant as the person who committed the crime. Having read the Linkages section of the memory chapter, Jenna knows she can have confidence in the identification if the witness
A. can accurately remember irrelevant details about the situation. B. can accurately describe the surroundings in which the crime occurred. C. cannot accurately remember details about the crime. D. cannot remember details about the surroundings.
During the course of a physical exam, a physician suspects his patient may be
depressed. In order to explore this diagnostic possibility, the physician uses a "brief screening device" for depression. The doctor probably A) used the AUDIT to determine their level of depression. B) asked the patient two questions about feelings of hopelessness and feelings related to the enjoyment of activities from a two-item screening instrument. C) used the General Health Questionnaire (GHQ) to assess the degree to which the patient's depression was affecting general health. D) asked the patient to rate his degree of depression using the Checklist of Mood States (CMS).
Studies of the persistence of ADHD into adulthood indicate that
a) adults who were diagnosed with ADHD as children are less likely to marry. b) adults who were diagnosed with ADHD as children usually completely outgrow their symptoms. c) the rates of ADHD vary considerably depending on the assessment method employed. d) the rates of ADHD appear to increase in adulthood because so many adults seek out diagnosis in order to obtain prescriptions for stimulants like Ritalin.