The value for the sum of products (SP) is always greater than or equal to zero
Indicate whether the statement is true or false
False
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Confirming a specific biological cause of general paresis was greatly aided by eventually discovering that
a. all such patients had a history of syphilis. b. most such patients developed syphilis later in life. c. very few such patients had ever been treated with penicillin. d. most such patients had lied about their sexual history.
When the controls of an experiment are lax and the experimenter's conclusion that the independent variable had an effect is not justified, the study lacks _____
a. causal certainty c. a null hypothesis b. internal validity d. external validity
Men and women have similar sensation-seeking scores
Indicate whether the statement is true or false.
A difficulty in studying residential treatment programs for drug abuse is that
a) most residences are secretive and unwilling to allow research activity. b) addicts at such settings are not severely addicted. c) patients at these settings are voluntary, and therefore these addicts represent a minority of the actual addict population. d) the number of patients entering such settings changes slowly, making it difficult to obtain an adequate number of participants.