Frank was seen laughing inappropriately in the library as if he were responding to internal stimuli. on the bus home, he was crying uncontrollably and suddenly became angered when a fellow passenger offered him a tissue. frank's excess of inappropriate behaviors exemplifies the typical of schizophrenia.

The answer is positive symptoms of schizophrenia. Individuals determined to have schizophrenia generally encounter a blend of positive (i.e. mind flights, hallucinations, dashing musings), negative (i.e. detachment, absence of feeling, poor or nonexistant social working), and psychological (muddled contemplations, trouble concentrating and additionally following guidelines, trouble finishing undertakings, memory issues).

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

producing or giving rise torelating to or engaged in the production of goods, crops, or other commodities.

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

Basically create a schedule on what you need to study and stick with it