In examining risk factors for developmental disabilities, genetic influences, chromosomal aberrations, and prenatal/perinatal problems that lead to brain changes are examples of
a. environmental risk factors.
b. psychological risk factors.
c. biological risk factors.
d. psychosocial risk factors.
c
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One sample is selected to represent scores in treatment 1 and a second sample is used to represent scores in treatment 2 . Which set of sample statistics would present the clearest picture of a real difference between the two treatments?
a. M1 = 36, M2 = 40, and both variances = 43 b. M1 = 36, M2 = 40, and both variances = 6 c. M1 = 38, M2 = 40, and both variances = 43 d. M1 = 38, M2 = 40, and both variances = 6
When we calculate the power for a number of different experimental designs, the calculations depend upon
a. a different approach to each kind of problem. b. the way we use the tables. c. the number of subjects we have. d. the same basic steps, but with slightly different formulae.
A classic method of measuring the retention of material in long-term memory over time is to ____
a. ?conduct MRI scans of the brain at annual or biennial intervals b. ?measure levels of cortisol, noradrenaline, and other hormones c. ?test and retest regarding the same material at regular intervals d. ?compare the rate of learning material the first time to the rate of learning the same material a second time
Schizophrenia means split personality
Indicate whether the statement is true or false