Frank was seen laughing inappropriately in the library as if he was responding to internal stimuli. on the bus home, he was crying uncontrollably and suddenly became angered when a fellow passenger offered him a tissue. his excess of inappropriate behavior is known as:

The answer that best fits the blank is the term POSITIVE SYMPTOMS. Based on the signs that Frank manifested above which are laughing inappropriately, crying uncontrollably and shows sudden anger, this excess of inappropriate behavior is called positive symptoms. Hope this helps.