Examlex
What is the origin of the present topography of the Appalachian Mountains?
Presented Stimulus
Any object or event that is perceived by the senses and can affect behavior.
Colic
A condition seen in infants, characterized by excessive, unexplained crying for more than three hours a day, more than three days a week, for three weeks or longer.
Vocal Quality
The characteristics of a person's voice including tone, pitch, and loudness that distinguish it from others.
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