Complex sentence: It has also been argued that narcissists aggress when insulted whereas psychopaths aggress when threatened, and that Machiavellian students cheat by plagiarizing essays whereas psychopaths impulsively copy other students' answers during exams.
Split into simpler sentences: It has also been argued that narcissists aggress when insulted whereas psychopaths aggress when threatened. Jones & Paulhus, 2010b, and that Machiavellian students cheat by plagiarizing essays whereas psychopaths impulsively copy other students' answers during exams.