H.P. Lovecraft is widely regarded as a master of psychological horror, crafting tales that delve into the fear of the unknown and cosmic terrors.

Xenophobia, in the context of psychological horror, refers to the fear of the unknown or the unseen, often associated with a sense of strangeness or foreignness.

Foreshadowing is a technique used to hint at or suggest future events, building a sense of anticipation and unease in the reader's mind.

Psychological horror narratives often delve into the theme of isolation, exploring the psychological effects of loneliness, alienation, and disconnection from society.

The Uncanny Valley concept, referring to the unsettling feeling evoked by entities that appear almost, but not quite, human, is often used to create a sense of dread and paranoia in horror stories.

Catharsis, in psychological horror, refers to the process of emotional release or purification, often experienced by characters as they confront their inner demons or face their fears.

Stream of Consciousness, a narrative technique that presents the uninterrupted flow of thoughts and emotions, is often used in psychological horror to create a sense of ambiguity and uncertainty.

Phobia refers to an intense, irrational fear of a specific object, situation, or activity, often leading to avoidance and anxiety.

Claustrophobic Horror is a subgenre of psychological horror that focuses on the fear of confinement and isolation, often involving characters trapped in enclosed spaces with malevolent entities.

Scopophobia refers to the intense fear of being watched or observed, often leading to feelings of paranoia and anxiety.

Gaslighting is a psychological manipulation technique that involves undermining a person's sanity by making them question their own perception of reality.

Dissociation is a psychological state characterized by a feeling of detachment from one's own thoughts, feelings, or body, often occurring as a response to trauma or stress.

Doppelganger is a psychological horror trope that involves the protagonist being haunted by an exact double of themselves, often symbolizing a dark or hidden aspect of their own personality.

Existential Dread is a psychological state characterized by a feeling of impending doom or catastrophe, often associated with the contemplation of mortality and the meaninglessness of existence.

Body Horror is a psychological horror trope that involves the protagonist experiencing a transformation or mutation of their own body, often symbolizing a loss of control or a descent into madness.