D
- Dark Triad Personalities
- Deception in Nature
- Defense Mechanisms (Psychological Defenses)​
- Degeneration Theory
- Delay of Gratification
- Delusional Disorder
- Dementia Praecox
- Demoralization Syndrome
- Denial: A Defense Mechanism
- Dependent Personality Disorder (DPD)
- Depression: A Mood Disorder
- Depressive Personality Disorder
- Depressive Realism
- Deservingness Heuristic
- Design Thinking
- Detachment (Psychological)
- DeTUR Protocol (EMDR)
- Deterrence Theory
- Deviance
- Developmental Counseling and Therapy
- Developmental Tasks
- Developmental Theories
- Dialectical Behavior Therapy
- Diathesis Stress Model​
- Dichotomous Thinking
- Differential Association Theory
- Differential Susceptibility Theory
- Diffusion of Innovation Theory
- Discernment Counseling
- Discrete Emotion Theory
- Disengagement Theory
- Displacement (A defense mechanism)
- Disruptive Mood Dysregulation Disorder
- Distractibility
- Dog Salivating Experiments (Classical Conditioning)
- Dopamine
- Dream Analysis
- Drive Reduction Theory
- Dual Coding Theory
- Dual Process Theory
- Dualism
- Dunning-Kruger Effect
- Dyadic Regulation
- Dysfunctional Attitude Scale (DAS)
- Dysthymic Disorder
E
- Echo Chambers
- Ego Defense
- Ego Depletion
- Ego Development
- Ego Ideal
- Ego Investment
- Ego State Theory (Therapy)
- Elaboration Likelihood Model
- Embodied Cognition
- Emo
- Emodiversity
- Emotion Differentiation
- Emotion Focused Therapy (EFT)
- Emotional Abuse
- Emotional Attunement
- Emotional Contagion
- Emotional Deficit
- Emotional Detachment
- Emotional Dissonance
- ​Emotional Dysregulation
- Emotional Equilibrium
- Emotional Flooding
- Emotional Freedom Techniques (EFT)
- Emotional Guidance System
- Emotional Integrity
- Emotional Intelligence
- Emotional Lability
- Emotional Labor
- Emotional Sensitivity
- Emotional Styles
- Emotional Triggers
- Emotional Valence
- Emotional Validation
- Emotional Wounds
- Emotionally Focused Couple Therapy (EFT)
- Emotionally Reactive
- Empathy
- Empowerment Theory
- Engulfment
- Enriched Environments
- Entity Theory
- Environment of Evolutionary Adaptedness
- Environmental Psychology
- Epigenetics
- Episodic Foresight
- Epistemology
- Equanimity
- Equity Theory
- Ericksonian Hypnosis
- Erikson’s Stages of Psychosocial Development
- Eudaimonia
- Euphemistic Labeling
- Evolutionary Psychology
- Executive Functions
- Existential Humanistic Therapy
- Exit-Voice-Loyalty-Neglect (EVLN) Model
- Exotic Becomes Erotic Theory
- Expected Utility Theory
- Explanatory Style
- Explicit Memory
- Exposome: Nature and Nurture
- Exposure Therapy
- Expressive Writing
- Externalization
- Eye Movement Desensitization and Reprocessing (EMDR) Therapy
F
- Fixed Mindset
- Fixed Role Therapy
- Floating Duck Syndrome
- Flourishing
- Flow State
- Focusing Illusion
- Force Field Analysis
- Four C Model of Creativity
- Fragmentation Psychology
- Free Association Therapy
- Freewill
- Freud’s Drive Theory
- Frijda’s Laws of Emotion
- Frustration-Aggression Hypothesis
- Fundamental Attribution Error