In an experiment, teachers' judgments are used to measure the amount of misbehavior among students. The teachers are more likely to judge a given behavior as misbehavior at the posttest than they are at the pretest. This example most clearly illustrates which threat to the internal validity of the experiment?

Mark the four statements that are true. 1. the democrats blamed the republicans for the stock market crash of 1929. 2. the democrats won the presidency in the 1990's but lost control of the congress. 3. the democratic party is the oldest political party in the united states. 4. the anti-federalists were one of the first two american political parties; they wanted a strong central government. 5. the "era of good feelings" was a period from 1816-1824 where there was only one political party: the democrat-republicans.

Ais a way of expressing the relationship of a number, quantity, substance, or degree between two components

A. the constitution goes into effect. b.samuel adams agree to support ratification of a bill of rights is added. c. virginia and new york refuses to hold conversations ratify the constitution. d. states begin holding conversations to debate ratifying the constitution.