The U.S. Constitution reflected the view that people were born free and equal and possessed certain natural rights

Which of the following is always used in differential research?

A) Random assignment of participants to groups B) The Pearson r or the Spearman r C) Random selection of participants to ensure a representative sample D) Groups differentiated on the basis of preexisting variables

Comparing the visual responses of a group of autistic children and a group of normal children is an example of

A) Naturalistic research. B) Case-study research. C) Differential research. D) Experimental research.