A variable, other than the independent variable, that appears to have influenced the dependent variable in a study is referred to as
a. a covariate.
b. an extraneous variable.
c. a redundant variable.
d. an inverse bias.
B
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The chemicals that are secreted from the terminal buttons into the synapse are
a. neurotransmitters. b. action potentials. c. antagonists. d. agonists.
An ultrasound is often used to help diagnose ____
a. prostate cancer c. priapism b. cryptorchidism d. testicular torsion
Mary Ainsworth observed that securely attached infants __________
a) do not seem to care when the mother leaves the room and do not seek her out on her return. b) protest loudly when the mother leaves but resist contact with her when she returns. c) cry if the mother leaves the room, are easily soothed, and welcome her back when she returns. d) are not concerned upon separation but cry to be picked up and held on her return.
One problem with the definition of mental retardation is that
A) it included many adolescents who experts believe should not be classified as mentally retarded. B) people should not be categorized as mentally retarded. C) it leaves a great deal of room for interpretation. D) it excludes many adolescents who experts believe should not be classified as mentally retarded.