Winds in the northern hemisphere are deflected to the right, and winds in the southern hemisphere are deflected to the left. what causes this pattern?
a. the earth’s tilt
b. the earth’s rotation
c. the earth revolving around the sun
d. sunlight

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.