Which of the Following Is True of Selection Effects

Multiple Choice

Which of the following is true of selection effects?

A) They are a type of confound.
B) They can occur when experimenters allow participants to choose their own treatment group.
C) They can occur when researchers assign one type of person to one treatment group and another type of person to another treatment group.
D) All of the above are true of selection effects.
E) None of the above are true of selection effects.