मनोवैज्ञानिक मुख्य रूप से और व्यापक रूप से निम्नलिखित में से किसका अध्ययन करते हैं?

__________ is the branch of psychology that studies unusual patterns of behavior, emotion, and thought, which may be understood as a mental disorder.

The word 'Psychology' is derived from which language's terms 'Psyche' and 'Logos'?

The two root words 'Psyche' and 'Logos' are derived from which language?