Aspanish explorer and conquistador of north and south america. he is the first explorer to document his discovery of the mississippi river on his search for a route to connect the atlantic and pacific ocean for trade to the east.

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.