In a quasi experiment, the researcher
a. selects subjects for different conditions from preexisting groups
b. has complete control over the way the experiment is to be conducted
c. has limited control over the way subjects are selected
d. both a and c
d
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Electrical stimulation of the cells of the preoptic area of the hypothalamus results in immediate a. NREM sleep
b. wakefulness. c. REM sleep. d. coma.
About ______ of all women reported a decreased desire to engage in sexual activity.
Fill in the blank(s) with the appropriate word(s).
In "true" experiments, researchers attempt to implement a high degree of control in order to
a. make the study more naturalistic. b. enhance the study's external validity. c. minimize the likelihood of confounding. d. avoid making cause-effect conclusions.
Scientists have discovered that there ________ the brains of children in the 3- to 15-year age range.
A. are phenomenal increases in the overall size of B. are dramatic changes in local patterns within C. are insignificant anatomical changes in D. are hardly any internal metamorphisms within