Why did the founders of the constitution want change to be hard in our democracy?

Many of the United States Founding Fathers were at the Constitutional Convention, where the Constitution was hammered out and ratified. George Washington, for example, presided over the Convention. James Madison, also present, wrote the document that formed the model for the Constitution.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.