Even though Julius had been living in the United States for a decade, he still dressed like a Ugandan. This preference by Julius to continue to tuck in his shirts and iron his clothes like he did in Uganda demonstrates a lack of:

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.