You would like the children in your class to appreciate the visual difficulties faced by three of their classmates. each of the experiences a different problem which activity would best achieve your goal? a moving in the dark b simulated glass c fishing for faces d traffic sign hunt

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.