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- Daily Assessment of Symptoms – AnxietyQuestionnaire to assess anxiety levels
- DailyStrengthDailyStrength is a division of Sharecare that serves as a social network centered on suppo
- DaimonicConcept referring to certain motivational forces
- Daisy L. HungTaiwanese cognitive psychologist and lawyer
- Dale SchunkAmerican psychologist
- Damian MiltonBritish autism researcher and advocate
- Dan OlweusSwedish-Norwegian psychologist (1931–2020)
- Dana AmirIsraeli poet, psychologist
- Dana KlisaninPsychologist, futurist, and author
- Dance therapyPsychotherapeutic use of movement and dance
- Dancing maniaMedieval social phenomena
- Dancing plague of 1518Mass dancing mania in Strasbourg
- Dane PrughDane Gaskill Prugh (3 June 1918 – 6 October 1990) was a child psychiatrist and psychoanaly
- Daniel Bar-TalIsraeli psychologist (born 1946)
- Daniel BerlyneBritish/Canadian psychologist (1924–1976)
- Daniel Freeman (psychologist)British academic
- Daniel Gilbert (psychologist)American social psychologist and writer
- Daniel H. PinkDaniel H. Pink (born July 23, 1964) is an American author. He has written seven New York T
- Daniel LagacheFrench psychiatrist and psychoanalyst (1903–1972)
- Daniel LevinsonAmerican psychologist
- Daniel LightwingDaniel James Lightwing is a former mathematics child prodigy and co-founder of the London-
- Daniel MessingerAmerican psychologist
- Daniel OfferAmerican psychiatrist
- Daniel SchacterAmerican psychologist (born 1952)
- Daniel StarchAmerican academic
- Daniel WegnerAmerican psychologist (1948–2013)
- Danielle SheypukAmerican psychologist (1978–2026)
- Danuta GierulankaPolish mathematician, psychologist, and philosopher
- Daphna OysermanAmerican psychologist
- Darby SaxbeAmerican clinical psychologist
- Darcia NarvaezAmerican psychologist
- Dark triadOffensive personality types
- Dark Triad Dirty DozenPersonality test for dark triad
- Darkness Visible (memoir)Book by William Styron
- Darold TreffertAmerican psychiatrist (1933–2020)
- Darrin HodgettsNew Zealand academic
- DartitisMotor condition that affects darts players
- DARVOAcronym for a common strategy of abusers
- Daryl BemAmerican psychologist (born 1938)
- Das–Naglieri Cognitive Assessment SystemPsychological theories
- DaseinTerm in Martin Heidegger's philosophy
- Dave Grossman (author)American writer and law enforcement trainer
- David A. RosenbaumAmerican psychologist
- David A. WashburnAmerican psychologist (1961–2025)
- David A. WolfeCanadian psychologist and author (born 1951)
- David AndrichAustralian academic and assessment specialist
- David BussAmerican evolutionary psychologist (born 1953)
- David Buss (United States Navy)David H. Buss (born February 18, 1956) is a native of Lancaster, Pennsylvania and a retire
- David C. FunderAmerican psychologist (born 1953)
- David C. RoweDavid Christian Rowe (September 27, 1949 – February 2, 2003) was an American psychologist
- David CanterPsychologist (born 1944)
- David CorwinDavid L. Corwin is a board-certified psychiatrist, child and adolescent psychiatrist, and
- David CrewsAmerican zoologist
- David D. BurnsDavid D. Burns (born September 19, 1942) is an American psychiatrist and adjunct professor
- David DeMatteoAmerican law professor
- David DunningAmerican social psychologist (born 1960)
- David EderBritish psychoanalyst, writer and Zionist (1865–1936)
- David Ernst OppenheimAustrian psychologist (1881–1943)
- David FerrierScottish neurologist and psychologist (1843–1928)
- David H. BrainardAmerican psychologist
- David H. HubelDavid Hunter Hubel FRS (February 27, 1926 – September 22, 2013) was an American Canadian n
- David H. RosenAmerican psychiatrist (1945–2024)
- David H. RosmarinAmerican psychologist
- David Henderson (psychiatrist)Scottish physician and psychiatrist
- David IndermaurAustralian psychologist
- David KeirseyAmerican psychologist (1921–2013)
- David L. ShapiroAmerican psychologist and author (born 1943)
- David Levy (psychologist)American actor and psychologist
- David LipscombDavid Lipscomb (January 21, 1831 – November 11, 1917) was a minister, editor, and educator
- David LisakAmerican psychologist
- David M. ClarkDavid Millar Clark, CBE, FBA, FMedSci, FAcSS (born 20 August 1954) is a British psychologi
- David M. GreenbergAmerican psychologist, neuroscientist
- David MaldavskyDavid Maldavsky was a doctor in philosophy and arts. He has written numerous books about p
- David Marks (psychologist)David Francis Marks (born 1945) is a psychologist, author and editor of numerous articles
- David MatsumotoAmerican psychologist (born 1959)
- David Myers (psychologist)American psychologist
- David Oliver CauldwellAmerican sexologist and writer
- David P. SchmittDavid P. Schmitt is a personality psychologist who founded the International Sexuality Des
- David R. HeiseAmerican psychologist (1937–2021)
- David RapaportHungarian psychologist (1911–1960)
- David RosenhanDavid L. Rosenhan (; November 22, 1929 – February 6, 2012) was an American psychologist. H
- David SarwerAmerican clinical psychologist and obesity researcher
- David SchwebelAmerican psychologist
- David ShafferPhysician and pediatrician (1936–2023)
- David Shannahoff-KhalsaDavid S. Shannahoff-Khalsa is a researcher in mind-body dynamics. He has published widely
- David Watson (psychologist)American personality psychologist
- Davida TellerAmerican psychologist
- Dawn BrookerBritish clinical psychologist (born 1959)
- Dawn M. SzymanskiAmerican psychologist
- Day-care sex-abuse hysteriaMoral panic and series of prosecutions
- DaydreamingAspect of human thought and consciousness
- De praestigiis daemonum1563 book by Johann Weyer
- Deadly Cults2003 book by Robert L. Snow
- Deaf mental health careDeaf mental health care is the providing of counseling, therapy, and other psychiatric ser
- Dean–Woodcock Neuropsychological Assessment SystemMedical diagnostic method
- Deanna BarchAmerican psychologist and professor
- Deanna KuhnAmerican psychologist and academic
- Death and adjustment hypothesesPsychological theory about death
- Death driveConcept from Freudian psychoanalytics
- Death of Dan MarkingsonControversial suicide case
- Death of Roger SylvesterRoger Stephen R. J. Sylvester (17 August 1968 – 19 January 1999) was a mentally ill man wh
- Deaths linked to chatbotsDeaths involving use of large language models
- DebiasingReduction of bias
- Deborah FeltzAmerican kinesiologist and sport psychologist
- Deborah H. GruenfeldAmerican social psychologist
- Deborah HasinAmerican psychiatrist epidemiologist and academic
- Deborah M. CapaldiDevelopmental psychologist
- Deborah SeraniAmerican psychologist
- Deborah TannenAmerican sociolinguist (born 1945)
- Deborah TreismanDeborah Treisman (born 1970) is the Fiction Editor for The New Yorker. Treisman also hosts
- Deborah VandellDevelopmental psychologist
- Debra LampshireNew Zealand trainer, educator, advocate and experience-based expert on mental health
- Debra PeplerCanadian psychologist
- Debra TitoneCognitive psychologist
- DebriefingReport back and review on a project or mission after completion
- Debtors AnonymousTwelve-step program
- Decision-making paradoxThe decision-making paradox is a phenomenon related to decision-making and the quest for d
- Decisional balance sheetTool for representing pros and cons
- Dedre GentnerAmerican psychologist
- Deep sleep therapyPsychiatric treatment
- Deep social mindDeep social mind is a concept in evolutionary psychology; it refers to the distinctively h
- Deese–Roediger–McDermott paradigmProcedure in cognitive psychology
- Default effectTendency to accept the default option
- Defence mechanismUnconscious psychological mechanism
- Defensible space theoryUrban planning theory
- Defensive attribution hypothesisCognitive bias
- Defensive communicationType of communication between people
- Defensive pessimismCognitive strategy for preparation
- Deficits in attention, motor control and perceptionProposed psychiatric diagnosis
- DeFries–Fulker regressionMethod of multiple regression analysis used in behavioural genetics
- Degeneration (Nordau)Two-volume book by Max Nordau
- DeinstitutionalisationReplacement of psychiatric hospitals
- Deirdre BarrettAmerican psychologist who studies dreams, hypnosis and imagery
- Deirdre WilsonBritish linguist and cognitive scientist (born 1941)
- Del LoewenthalPsychotherapist
- Delayed ejaculationMale inability or persistent difficulty in achieving orgasm
- Delayed gratificationResistance of an immediate reward in return for a greater reward later
- Delboeuf illusionOptical illusion
- Deliberative opinion pollGauges opinion before and after significant deliberation
- Delinquency spiralPsychological mechanism in adolescence
- Delis–Kaplan Executive Function SystemNeuropsychological test
- Della HannAmerican psychologist and research administrator
- Delusional disorderMental disorder featuring beliefs with inadequate grounding
- Delusional intuitionType of mental illusion
- Delusional misidentification syndromePsychological disorder
- Delusional parasitosisMedical condition
- Delusions of grandeurSubtype of delusion
- Demand (psychoanalysis)Concept in Lacanian psychoanalysis
- Dementia praecoxObsolete medical term for the schizophrenia and autism spectrums
- Democratic PsychiatryItalian social movement
- Demonstration effectSocial psychology concept
- DemotivationLoss of motivation caused by specific external influences
- DenialAssertion that a statement is false
- DenialismRejecting scientific or historical consensus
- Denis GerstorfGerman psychologist
- Denise RousseauAmerican psychologist (born 1951)
- Denomination effectForm of cognitive bias relating to currency
- Deolali transit campBritish Army transit camp in India
- Dependency needPsychology concept
- DepersonalizationAnomaly of self-awareness
- Depression and Bipolar Support AllianceSupport group organization
- Depression and Bipolar Support Alliance (Greater Houston)The Depression and Bipolar Support Alliance (DBSA) Greater Houston is a 501(c)(3) non-prof
- Depression and cultureCulture defines how people view the world and certain phenomena. Culture also appears to i
- Depression Anxiety Stress ScalesSelf-report mood disorder questionnaire
- Depression in childhood and adolescencePediatric depressive disorders
- Depressive anxietyFreudian state of anxiety
- Depressive disorder not otherwise specifiedMood disorder diagnosis
- Depressive realismHypothesis about depression
- Depth mapIn 3D computer graphics and computer vision, a depth map is an image or image channel that
- Depth psychologyPsychological approach
- Derailment (thought disorder)Thought disorder in psychiatry
- DerealizationPerception that the external world is not real
- Derek SummerfieldSouth African psychiatrist
- Descartes' Error1994 book by Antonio Damasio
- Descriptive phenomenological method in psychologyThe descriptive phenomenological method in psychology was developed by the American psycho
- Desegregation busingAttempt to racially diversify American public schools
- Desensitization (psychology)Diminished responsiveness to a stimulus after repeated exposure
- Design rationaleExplicit listing of design decisions
- DesireEmotion of longing for a person, object or outcome
- Desire discrepancyDifference between a desired sexual intercourse frequency and the actual frequency
- Desmond MorrisEnglish zoologist, ethologist and artist (1928–2026)
- Desperate Remedies: Psychiatry's Turbulent Quest to Cure Mental Illness2022 book by Andrew Scull
- DestabilisationAttempts to undermine political, military or economic power
- DeterminationPositive emotional feeling
- Developmental disabilityDisability beginning before adulthood
- Developmental eclecticismDevelopmental eclecticism or systematic eclecticism is an eclectic psychotherapy framework
- Developmental homeostasisProcess of normal development despite circumstances
- Developmental needs meeting strategyPsychotherapy approach
- Developmental neuropsychologyDevelopmental neuropsychology combines the fields of neuroscience and developmental psycho
- Developmental nicheThe developmental niche is a theoretical framework for understanding and analyzing how cul
- Developmental noiseDevelopmental noise or stochastic noise is a concept within developmental biology in which
- Developmental psychobiologyDevelopmental psychobiology is an interdisciplinary field, encompassing developmental psyc
- Developmental psychologyScientific study of psychological changes in humans over the course of their lives
- Developmental psychopathologyScientific study of the development and life course of mental disorders
- Developmental regressionLoss of developmental skills in children
- Developmental stage theoriesStages of human child development
- Developmental-behavioral surveillance and screeningMedical diagnostic method
- Devon PolaschekNew Zealand professor of psychology
- Dewey StuitDewey Stuit (pronounced stew-it, January 24, 1909 - January 9, 2008) was an American educa
- Dexter R. VoisinAmerican-Trinidadian social work scientist and author (born 1963)
- Dhat syndromeCulture-bound medical condition
- DiabulimiaEating disorder for people with diabetes
- Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early ChildhoodDiagnostic manual
- Diagnostic Interview for ADHD in AdultsADHD assessment tool
- Diagnostic overshadowingDiagnostic error
- Diagnostic substitutionDiagnostic substitution is a phenomenon in which one label for a condition becomes replace
- Diagrammatic reasoningReasoning by means of visual representations
- Dialectics of Liberation Congress1967 international congress in London
- Dialog+Psychological intervention
- Dialogic public relations theoryTheory on organisations' public interactions
- Dialogical selfThe mind's ability to imagine different positions of participants in an internal dialogue
- Diana BaumrindAmerican psychologist (1927–2018)
- Diana DeutschAmerican psychologist
- Diana FoshaAmerican psychologist
- Diana KirschnerAmerican psychologist
- Diane F. HalpernAmerican psychologist
- Diane HughesDevelopmental psychologist
- Diane MuldrowDiane Muldrow is an American author and former editorial director at Golden Books. Her wor
- Dianne ChamblessAmerican clinical psychologist (1948–2023)
- Diary studiesResearch method
- Diathesis–stress modelPsychological theory
- DIBELSTests for assessing literacy of children
- Dick PriceRichard Price (October 12, 1930 – November 25, 1985) was an American Gestalt therapist, co
- Dictator gameExperimental tool
- Die Psychologie des Verbrechers1916 book by Paul Pollitz
- Die Sexualität im Kulturkampf1936 book by Wilhelm Reich
- Diederik StapelDutch social psychologist and research fraudster (born 1966)
- Diego De LeoItalian academic and psychiatrist (born 1951)
- Diennaryati TjokrosuprihatonoIndonesian development psychologist
- Differential Ability ScalesSet of cognitive and achievement tests for children
- Differential diagnoses of depressionDepression, one of the most commonly diagnosed psychiatric disorders, is being diagnosed i
- Differential Emotions ScalePsychological self-assessment
- Differential K theoryDebunked psychological hypothesis
- Differential psychologyBranch of psychology
- Differential susceptibilityThe differential susceptibility theory proposed by Jay Belsky is another interpretation of
- Difficult conversationA difficult conversation is a dialogue addressing sensitive, controversial, or emotionally
- Digit symbol substitution testMedical diagnostic method
- Digital phobicDigital phobic is an informal phrase used to describe a reluctance to become fully immerse
- DignityPerson's right to be valued, respected and treated ethically
- Diminished responsibility in English lawPartial defence to murder in English law
- Dina FeldmanIsraeli psychologist
- Dinah MurrayEducator and campaigner (1946–2021)
- Dinelia RosaPsychologist and Professor
- Dinora PinesBritish physician and psychoanalyst
- Diogenes syndromeBehavioral disorder
- DipsomaniaMedical condition
- Disabilities affecting intellectual abilitiesSubnormal intellectual functioning (cognitive disorder)
- Disability abuseForm of abuse
- Disability Rights InternationalDisability Rights International (DRI), formerly Mental Disability Rights International, is
- DisaffectationThe term disaffectation was coined by French psychoanalyst Joyce McDougall as a strictly p
- DISC assessmentLeadership assessment tool
- Disconfirmed expectancyPsychological term for what is commonly known as a failed prophecy
- Disconnection (Scientology)Mandated shunning-type practice
- Discourse ProcessesDiscourse Processes is a bimonthly peer-reviewed multidisciplinary academic journal coveri
- Discovery learningTechnique of inquiry-based learning
- Discrete emotion theoryTheory in psychology
- Discrimination against autistic peopleDiscrimination against autistic people involves any form of discrimination, persecution, o
- Discrimination against homeless peopleDiscrimination against homeless people is a form of aporophobia which is categorized as th
- Discursive complexThe notion of the 'discursive complex' was developed by Ian Parker to tackle the twofold n
- Discursive psychologyForm of discourse analysis
- Disengagement theoryTheory of aging
- DisgustBasic emotion
- Disinformation in the Russian invasion of UkraineAs part of the Russian invasion of Ukraine, the Russian state and state-controlled media h
- Disinhibited social engagement disorderAttachment disorder
- DisinhibitionLack of restraint
- Disorganized offenderClassification of serial killer
- Disorganized schizophreniaObsolete subcategory of schizophrenia
- Displaced aggressionAnger directed at something other than the stimuli
- Displacement (psychology)Unconscious defense mechanism (psychology)
- Displacement activityBehaviour due to cognitive conflict
- Display rulesCultural standards for how one should express oneself
- Dispositional affectPersonality trait
- Dispositional attributionPhrase in personality psychology
- Disruptive Behavior Disorders Rating ScaleMedical diagnostic method
- Disruptive mood dysregulation disorderMental disorder
- Dissent from Catholic teaching on homosexualityDissent from the Catholic Church's teaching on homosexuality has come with a number of pra
- Dissociation (neuropsychology)Neuropsychology term
- Dissociation (psychology)Feeling of detachment from reality
- Dissociative fugueDissociative disorder
- Distance Education Learning Environments SurveyThe Distance Education Learning Environments Survey (DELES) is a psychosocial learning env
- Distinction biasCognitive bias
- Distraction-conflictConcept in social psychology
- Distress toleranceConstruct in psychology
- Distributed cognitionPsychologic theory
- Distributed scaffoldingLearner-centric pedagogy
- Divergent thinkingProcess of generating creative ideas
- Diversity ideologiesAssociated with distinct effects on intergroup relations
- Divine PowerDivine Power is a supplement for the 4th edition of the Dungeons & Dragons fantasy role-pl
- Divorcees AnonymousDivorcees Anonymous was an organization in the United States which received notable press
- Doctor of Clinical PsychologyThe degree of Doctor of Clinical Psychology (DClinPsy/DClinPsych/ClinPsyD) is a profession
- Doctor of PsychologyDoctoral degree
- Dodo bird verdictArgument about the effectiveness of psychotherapy
- Dolf ZillmannAmerican psychologist specialising in media psychology
- Domain specificityTheoretical position related to cognitive science
- Domestic violence in New ZealandDomestic violence in New Zealand, often called family violence or family harm is defined u
- Domestic violence in RussiaDomestic violence is a severe issue in Russia. According to Human Rights Watch, citing RIA
- Dominic systemMnemonic system for remembering sequences of digits
- Dominique de QuervainSwiss neuroscientist
- Don JuanismDesire in a man to have sex with many different female partners
- Donald BroadbentBritish psychologist (1928–2020)
- Donald DuttonCanadian psychologist
- Donald F. KleinAmerican psychiatrist (1928–2019)
- Donald G. PatersonAmerican psychologist (1892–1961)
- Donald H. BaucomDonald H. Baucom, (born 22 July 1949) is a clinical psychology faculty member at the Unive
- Donald M. BaerAmerican psychologist (1931–2002)
- Donald MeichenbaumAmerican psychologist and psychotherapist
- Donald O. CliftonAmerican psychologist
- Donald O. HebbCanadian neuropsychologist (1904–1985)
- Donald RubinAmerican statistician (born 1943)
- Donald T. CampbellAmerican social scientist (1916–1996)
- Donata FrancescatoItalian psychologist
- DoomscrollingCompulsive consumption of negative online contents
- Door-in-the-face techniqueStarting with an unreasonable offer to make the next one more appealing
- Dopamine dysregulation syndromeNeuralogical disorder caused by long-term use of dopaminergic drugs
- Dora (case study)Patient of Sigmund Freud
- Doreen GranpeeshehAmerican psychologist
- Doreen KimuraCanadian psychologist (1933–2013)
- Doris Twitchell AllenAmerican psychologist
- Dorothea M. RossCanadian-American pediatric psychologist
- Dorothy BurlinghamAmerican psychoanalyst (1891–1979)
- Dorothy CantorAmerican psychologist
- Dorothy DinnersteinFeminist activist and author
- Dorothy EspelageAmerican psychologist
- Dorothy JinarajadasaDorothy Jinarajadasa (born Dorothy May Graham; 19 March 1881 - 13 January 1963) was an Eng
- Dorothy NyswanderAmerican psychologist
- Dorothy RiddleAmerican psychologist
- Dorothy SteinAmerican psychologist and computer scientist (1931–2019)
- Dorothy W. BaruchAmerican psychologist
- Dorret BoomsmaDutch psychologist
- Dot-probe paradigmCognitive psychology test
- Double bindPsychological dilemma
- Double depressionCombination of major depressive disorder and persistent depressive disorder
- Double empathy problemPsychological theory regarding individuals on the autism spectrum
- DoubtStatus between belief and disbelief
- Douglas HaldaneScottish child psychiatrist
- Douglas MataAmerican pathologist
- Douglas N. JacksonCanadian psychologist (1929–2004)
- Douglas SpaldingBritish biologist
- Dov ShmotkinIsraeli psychologist (born 1949)
- Dr. Fox effectCorrelation in educational psychology
- Drag panicOngoing moral panic alleging drag is harmful to minors
- Drama therapyUse of theatre techniques to promote mental health
- Draw-a-Person testPsychological test for children and adolescents
- Draw-a-Scientist TestTest of children's perceptions of science
- DreamPhenomenon of the mind while sleeping
- Dream consciousnessDream consciousness is a term defined by the theorist of dreaming science J. Allan Hobson,
- Dream dictionaryTool for interpreting dream images
- DreamworkTool of psychoanalysis
- Drew WestenAmerican psychologist and political writer and messaging consultant
- Drive reduction theory (learning theory)Drive reduction theory, developed by Clark Hull in 1943, is a major theory of motivation i
- Drive theoryPsychological theory
- Drive: The Surprising Truth About What Motivates Us2009 book by Daniel Pink
- DromomaniaHistorical psychiatric diagnosis
- Drope v. Missouri1975 United States Supreme Court case
- Drug Effects QuestionnaireAssessing the effects of drugs
- Drug Recognition ExpertLaw enforcement officer trained to identify people whose driving is impaired by drugs
- Drug-related deaths in the United KingdomIn 2023, 5,448 deaths in England and Wales and 1,172 in Scotland were recorded as “drug mi
- Dry stateUS state in which alcohol was prohibited
- Dual diagnosisConcurrent mental and substance use disorders
- Dual process theoryPsychological theory of how thought can arise in two different ways
- Dual process theory (moral psychology)Theory of human moral judgment
- Dual representation (psychology)Representational insight is the ability to detect and mentally represent the relation betw
- Dual representation theoryPsychological theory
- Dual systems modelTheory in developmental cognitive neuroscience
- Duality (CoPs)In a community of practice, duality refers to a tension between two forces which become a
- Duck faceType of facial expression
- Duke lacrosse rape hoax2006 criminal case in Durham, North Carolina, United States
- Duluth modelProgramme to reduce domestic violence against women
- Duplessis OrphansCanadian children wrongly classified as mentally ill
- Duration neglectCognitive bias
- Dušan PajovićLeft-wing activist and author
- Dusky v. United States1960 United States Supreme Court case
- Duty to protectDuty in medical law and ethics
- Duty to warnLegal concept
- Dyadic developmental psychotherapyMedical treatment for children with emotional disorders
- Dynamic decision-makingDynamic decision-making (DDM) is interdependent decision-making that takes place in an env
- Dynamic deconstructive psychotherapyDynamic deconstructive psychotherapy (DDP) is a manual-based treatment for borderline pers
- Dysexecutive syndromeCondition usually resulting from brain damage
- Dysfunctional familyFamily dynamic
- DysorthographyMedical condition
- DysphoriaProfound state of unease or dissatisfaction
- DysprosodyNeurological disorder
- DysrationaliaInability to think and behave rationally despite adequate intelligence
- DyssemiaDifficulties with nonverbal communication