which design design would have been used to evaluate whether the experimental design was positive in all participants? which design design is true if all participants perform a t-test which design of an experiment would require control over all participants first? which design is controlled factorial? how does the control factor design work which design of experiment is positive control which design allows you to evaluate effect in a factorial experiment? why do we use factorial how to design a factorial experiment what design of experiment would you use for an experiment that involves random assigning of the factors? when to use a controlled factorial design why use factorial design in an experiment what kind of test is used in a factorial design? which is a control factorial who is the control for factorial experiments what is the purpose in a factorial design? what type of design for factorial testing how is a factorial design used what is controlled factorial design what to test for in factorial design