different problems. The horse would choose the answer for the owner’s problem or could not answer the computation problem at all. When scientists have two theories that appear to be equally possible, the parsimony principle is used. This principle encourages scientists to choose the simpler theory with fewer conceptual relationships to be preferred. In addition, scientists have learned to look for facilitated communication cues as was the case in an autism studies by Faith in 1989 and 1993. The experimental controls used by the scientists disproved that the autistic children were actually typing on a keyboard when in fact the facilitators were making subtle tactile cues by the facilitator. Psychologists use the scientific method in
