Differential attrition threatens internal validity because
a. the independent variable is biased
b. reliability of the measures is lowered
c. participants differ between the experimental groups
d. pretest sensitization is more likely
e. demand characteristics are present
C
Psychology
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Freud created the first stage theory of development, and called it the Psychosocial Stages of Development.
a. true b. false
Psychology
You feel physically sick, but your doctor says nothing is wrong with you;
or you suffer from pain that has no physical basis; or you are preoccupied with thoughts about being sick. If you showed these symptoms, you would most likely be diagnosed with some form of disorder. a. obsessive-compulsive b. dissociative c. neurocognitive d. somatic symptom
Psychology