T_2_20 — Personality Disorders: Cluster Analysis and Dimensional Models

Personality disorders (PDs) — enduring patterns of inner experience and behavior that deviate markedly from cultural expectations, are pervasive and inflexible, and cause significant functional impairment — affect approx

T_2_02 — Neurodiversity — Cognitive Variation as Adaptive Spectrum

The neurodiversity paradigm, articulated by sociologist Judy Singer in 1998, frames neurological differences—including autism, ADHD, dyslexia, synesthesia, Tourette syndrome, and other developmental conditions—not as pat

T_2_19 — Eating Disorders

Eating disorders (EDs) — including anorexia nervosa (AN), bulimia nervosa (BN), binge eating disorder (BED), and avoidant/restrictive food intake disorder (ARFID) — affect an estimated 9% of the global population over th

T_2_00 — Clinical Health: Subfolder Summary

T_2_22 — Psychopathy Neuroscience

Psychopathy is a personality disorder characterized by persistent antisocial behavior, impaired empathy and remorse, bold and disinhibited traits, and often superficial charm — affecting an estimated 1% of the general po

T_2_14 — Hypnosis: Suggestion, Trance, and the Science of Hypnotic Phenomena

Hypnosis — a procedure involving an induction (typically relaxation and focused attention instructions) followed by suggestions for changes in perception, sensation, emotion, thought, or behavior — has oscillated between

T_2_13 — Placebo and Nocebo Effects

The placebo effect — a measurable physiological or psychological improvement in response to an inert treatment — is one of the most robust and well-documented phenomena in medicine and psychology, while the nocebo effect

T_2_18 — Schizophrenia & Psychotic Disorders

Schizophrenia is a severe psychiatric disorder affecting approximately 24 million people worldwide (WHO, 2022), characterized by positive symptoms (hallucinations, delusions, disorganized thought), negative symptoms (anh

T_2_17 — Depression & Mood Disorders

Major Depressive Disorder (MDD) affects an estimated 280 million people worldwide (WHO, 2023) and is the leading cause of disability globally. The neurobiological understanding of depression has undergone a paradigm shif

T_2_16 — Body Dysmorphic Disorder

Body dysmorphic disorder (BDD) is a psychiatric condition characterized by persistent, distressing preoccupation with perceived defects or flaws in physical appearance that are not observable or appear slight to others.

T_2_09 — Fear, Anxiety, and Phobias

Fear and anxiety are functionally distinct emotion systems: fear is a present-oriented defensive response to immediate threats (fight-flight-freeze), while anxiety is a future-oriented state of apprehension about potenti

T_1_06 — Cognitive Development — Piaget, Vygotsky, Theory of Mind

Cognitive development — how human minds grow in their capacity to think, reason, solve problems, and understand the world — has been dominated by two foundational theories: Jean Piaget's constructivist stage theory (1936

T_1_13 — Object Relations Theory: Internal Worlds, Attachment, and the Relational Self

Object relations theory — the most influential post-Freudian psychoanalytic tradition — shifted the focus of psychoanalysis from Freud's drive theory (instinctual drives seeking discharge) to the primacy of relationships

T_1_10 — Psychometrics and Intelligence Testing

Intelligence testing is among the oldest and most psychometrically robust enterprises in psychology. Spearman's g factor (1904) — a general mental ability extracted through factor analysis — remains one of the strongest

T_1_14 — Self-Determination Theory: Autonomy, Competence, Relatedness, and Intrinsic Motivation

Self-Determination Theory (SDT) — developed by Edward Deci and Richard Ryan (University of Rochester, 1985–present) — is one of the most influential and empirically supported theories of human motivation, proposing that

T_1_15 — Schema Theory: Cognitive Frameworks, Scripts, and Knowledge Organization

Schema theory — the idea that the mind organizes knowledge into structured mental frameworks (schemas) that guide perception, memory, and reasoning — is one of the foundational concepts in cognitive psychology, linking w

T_1_19 — Depression: Neurobiology, Treatment Evolution & Cultural Perspectives

Major depressive disorder (MDD) — affecting approximately 280 million people worldwide (WHO, 2021) and ranking as the leading cause of disability globally — is a heterogeneous condition whose neurobiology remains incompl

T_1_00 — Foundations Theories: Subfolder Summary

T_1_07 — Emotion Theory and Affect

Emotion theory addresses one of psychology's most fundamental and contested questions: What are emotions, where do they come from, and how many are there?

T_1_12 — Jung's Later Works: Synchronicity, Aion, and the Red Book

Carl Gustav Jung's later works (roughly 1944–1961) represent the most ambitious, controversial, and philosophically daring phase of his career — extending analytical psychology from clinical psychotherapy into domains of