Final answer:
The term that describes a pattern of deceitful, callous, manipulative, and remorseless behavior is psychopathy. It's important to differentiate this term from similar constructs such as sociopathy, narcissism, and Machiavellianism.
Step-by-step explanation:
The term used to describe a pattern of deceitful, callous, manipulative, and remorseless behavior is psychopathy. Individuals who are psychopathic exhibit a range of antisocial behaviors, lack empathy, and often behave in ways that are considered socially unacceptable. However, psychopathy is a complex and multifaceted condition that can manifest in varying degrees, and not all individuals classified as psychopaths engage in criminal behavior. This term is often confused with sociopathy, narcissism, and Machiavellianism, which are also personality constructs associated with certain antisocial behaviors, but each has its distinct qualities based on the research provided by Crego and Widiger.