What behavior was observed in Shirley Stevens that aligns with symptoms of mania?

The behavior of walking back and forth and waving as if to an audience aligns with symptoms of mania. In a manic state, individuals often exhibit heightened energy levels, increased motor activity, and a need for attention. They may engage in behaviors that seem exaggerated or theatrical, reflecting an elevated mood and a desire for social interaction or validation from others. This behavior can manifest as a sense of grandiosity or an overly enthusiastic demeanor, making individuals appear to be acting out or performing, which is what is observed in Shirley Stevens.

In contrast, the other options describe behaviors that are more subdued or withdrawn. Staying quiet and reserved suggests a lack of engagement or energy, which would not be characteristic of mania. Excessive planning and organization may indicate heightened activity but does not capture the impulsive and erratic nature of manic behaviors. Isolation from others is also contrary to the typical need for social connection seen in manic episodes.