Which of the following was a direct advantage of the newly developed machinery in the industrial revolution? a. goods could be produced quickly. b. people could travel to asia. c. laborers could develop specialized crafts. d. women could stop working.

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.