On the first trial, a rat in a Skinner box is reinforced for the first bar press it makes after 50 seconds have elapsed. On the second trial, the first bar press after 70 seconds is reinforced. Although it varies from trial to trial, the average works out to one reinforcer every 60 seconds. The rat is on a schedule of reinforcement.

Me 1. identify countries 2 and 3 shown above. a) australia and samoa b) samoa and vanutu c) micronesia and samoa d) new zealand and new guinea

Mike and his wife, amanda, are arguing about his in-laws. mike doesn’t want them to visit because they fight all the time when they come to the house and he is worried about the effect that their fighting is having on mike and amanda’s children. amanda finally yells out: “what about our fighting? ” mike replies, “well, that’s different. we fight because we’re having a disagreement, they fight because they hate each other! ” this is an example 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.