Marie has a diagnosis of borderline personality disorder. When she first saw her therapist, she immediately liked her, talked about her to everyone, and could not wait for her next session. When the therapist advised her that she would be relocating and it would be necessary to transfer her to a different therapist, Marie flew into a rage and told the therapist that she hated her and hoped she died. This is an example of

This would be an example of a mood swing or emotional swings

Explanation: From my understanding, it is common for people with BPD to have intense swings of emotion(it's one of the most common symptoms) Marie's mood swings would be very intense assuming she hasnt began treatment yet.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.