What Were Two Features of the Procedure Which Griffiths Used

Multiple Choice

What were two features of the procedure which Griffiths used in order to increase the ecological validity?

A) The study used a fruit machine specially designed for the study and participants could keep any winnings
B) The study took place in a natural setting and participants bet their own money
C) The participants did not know they were being studied and bet their own money
D) None of these answers
E) The study took place in a natural setting and participants could keep any winnings