Adding a participant variable to a design with an existing independent variable is one way to increase external validity. True or False

How were the economies of the northern and southern states different? how ere they the same? what factors led them to develop differently?

1. in the debate for the student council election, a student candidate quoted explicit lyrics from a popular song. the school suspended him for two days, in line with school policy. 2. a student sued the school over its policy of holding two proms: one for african american students and one for white students. - are these civil or criminal cases? how do you know? - which court has original jurisdiction in the case: state court, federal court, or the u.s. supreme court? -. where will the case go next if it is appealed?

Among the many crucial themes related to politics, a central idea of politics includes the existence of