Joshua is experiencing a manic episode, but he has a wide variety of symptoms. Although he sometimes feels very good about himself and "high on the world," he sometimes feels sad and anxious at the same time. He finds it hard to explain to his therapist how he can feel both good and bad at the same time. Joshua is experiencing a manic episode with features.

"Mixed" will be the correct answer.

Explanation:

When you're in a manic or depressive condition with mixed characteristics, you'll have satisfied the accurate test requirements for a previous psychotic phase and therefore will have encountered at least 2 or 3 signs of distress for much of the similar given timeframe:

Perhaps Joshua's having a psychotic episode containing mixed characteristics.