For what purpose was trephining performed in the Middle Ages?

A) remove blood
B) exorcise witches
C) release evil spirits
D) operate on the brain

C

Psychology

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Laughter reflects

A) increased sensitivity to object permanence. B) sensitivity to the human face. C) an infant's capacity to respond to passive stimuli. D) faster processing of information than smiling.

Psychology

An entire group of persons, things or events having at least one trait in

common defines the a. population b. sample c. statistic d. measurement scale

Psychology