As part of an experiment on the effects of behavior modeling, a set of raters are evaluating prosocial behavior in a series of videotapes of a preschool class. Initially, the raters were quite strict in their ratings, but after 3 hours of rating, their criteria had changed. Which type of threat to internal validity has occurred?

A. testing
B. attrition
C. maturation
D. history

Charles schenck was a u.s. citizen and private in the army. while in military training during world war i, schenck printed and passed out leaflets explaining why he was against the draft (required military service). he was charged with violating the espionage act of 1917, a federal law outlawing any action interfering with military operations. schenck believed the espionage act violated his right to free speech. in which court would this case ultimately be decided, and why? a state criminal court, because schenck was accused of violating a criminal law a military tribunal, because the matter involved members of the military a county civil court, because it involved violation of a civil liberty the u.s. supreme court, because schenck challenged whether the law was constitutional

Which of the following contributed most to making the items listed in the box

In article v of the united states constitution, the amendment process is explained. why did the framers include provisions for amending the constitution? a) to limit the individual liberties of american citizens b) to allow the constitution to adapt to future circumstances c) to allow the president to change the constitution as needed eliminate d) to ensure that state governments had more power than the nation