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- G factor (psychometrics)Psychometric factor also known as "general intelligence"
- G-VPR modelPsychological theory of cognitive skill
- Gabriel J. MartínSpanish psychologist, writer and LGBTI activist (born 1971)
- Gabriel TardeFrench sociologist
- Gabriela Rodríguez de BukeleFirst Lady of El Salvador since 2019
- Gabriele OettingenGerman non-fiction writer, university teacher and psychologist
- Gabrielle ClerkCanadian psychoanalyst
- Gail E. WyattAmerican clinical psychologist
- Gail GoodmanAmerican psychologist
- Galant SchemataGalant Schemata, as described by Robert Gjerdingen in Music in the Galant Style, are "stoc
- Galena K. RhoadesClinical psychologist and academic
- GaleophobiaFear of sharks
- Galveston Orientation and Amnesia TestMedical diagnostic method
- Gamblers AnonymousSupport group for recovering compulsive gamblers
- Games People Play (book)1964 book by Eric Berne
- GamificationUsing game design elements in non-games
- Ganser syndromeMedical condition
- Ganzfeld experimentPseudoscientific test for extrasensory perception (ESP)
- GapjilSouth Korean neologism term for power harassment
- Gardner LindzeyAmerican psychologist (1920–2008)
- Garrard ConleyGarrard Conley (born 1984 or 1985) is an American author and LGBTQ activist known for his
- Gary B. MesibovAmerican psychologist, author and researcher
- Gary DellAmerican cognitive scientist
- Gary GottfredsonAmerican psychologist
- Gary MarcusAmerican cognitive scientist (born 1970)
- Gary NamieAmerican psychologist
- Gary WinkelAmerican environmental psychologist (1938–2025)
- Gateway belief modelThe gateway belief model (GBM) suggests that public perception of the degree of expert or
- Gaucho cultureCultural traditions of the South American gauchos
- Gay A. BradshawAmerican psychologist and ecologist
- Gay affirmative psychotherapyAlternative for conversion therapy
- Gay Nazis mythMyth that homosexuals pervaded the Nazi Party
- Gayla MargolinPsychologist
- Gaze-contingency paradigmTechniques for changing computer screen display depending on where the viewer is looking
- GeasMythological taboo or vow
- Geir OverskeidNorwegian psychologist
- GelotophiliaEnjoyment of being laughed at
- Gemütlose psychopathyMedical condition
- Gen Z stareStaring behaviour associated with Generation Z
- Gender benderPerson who disrupts expected gender roles
- Gender differences in suicideGender differences in suicide include different rates of suicides and suicidal behavior be
- Gender disappointmentUnmet desire for a child of a preferred sex
- Gender dysphoriaMental distress due to gender incongruence
- Gender dysphoria in childrenDiscontent with sex assigned at birth in children
- Gender polarizationIn sociology, gender polarization is a concept created by American psychologist Sandra Bem
- Gender roles and fluidity in indigenous Nigerian culturesThe colonization of the West African region that lies across the Niger River took place be
- Gender roles in childhoodGender roles are culturally influenced stereotypes which create expectations for appropria
- GenderDoc-MLGBTQ+ organization in Moldova
- Genealogical bewildermentGenealogical bewilderment is a term referring to potential identity problems that could be
- General Aptitude Test BatteryWork-related cognitive test
- General Behavior InventoryPsychological assessment tool
- General Health QuestionnairePsychometric screening tool
- General knowledgeType of information
- General Practitioner Assessment of CognitionThe General Practitioner Assessment of Cognition (GPCOG) is a brief screening test for cog
- General strain theoryTheory of criminology
- Generalized Anxiety Disorder 7Anxiety disorder screening instrument
- GenerativityTerm originating in psychology to describe a concern for the next generation
- Generic viewsThe principal of generic views in the study of cognition stipulates that the interpretatio
- Genetic memory (psychology)Memory present at birth that exists in the absence of sensory experience
- Genetic Studies of GeniusLongitudinal study in the field of psychology
- Geneviève de Gaulle-AnthoniozGeneviève de Gaulle-Anthonioz (25 October 1920 – 14 February 2002) was a member of the Fre
- Genital stageFreudian psychosexual development
- Genitality in the Theory and Therapy of Neurosis1927 monograph by Wilhelm Reich
- GeniusExceptional intellectual ability, creativity, or originality
- GenophobiaFear of sexual relations or sexual intercourse
- GenopoliticsStudy of genetic basis of political behavior and attitudes
- Geoffrey B SaxeAmerican developmental psychologist
- Geoffrey BeattieBritish psychologist, author and broadcaster
- Geon (psychology)Geons are the simple 2D or 3D forms such as cylinders, bricks, wedges, cones, circles and
- Georg RaschDanish mathematician
- George A. FergusonCanadian psychologist
- George Cheyne Shattuck ChoateAmerican physician (1827–1896)
- George E. PartridgeAmerican psychologist
- George EstabrooksCanadian-American hypnotist
- George J. MohrAmerican physician
- George Kelly (psychologist)George Alexander Kelly (April 28, 1905 – March 6, 1967) was an American psychologist, ther
- George M. StrattonAmerican psychologist
- George Miller BeardGeorge Miller Beard (May 8, 1839 – January 23, 1883) was an American neurologist who popul
- George RekersAmerican psychologist and evangelist
- George S. Everly Jr.American psychologist
- George S. Patton slapping incidents1943 incidents during the WW2 Allied invasion of Sicily
- George Schlager WelshGeorge Schlager Welsh (September 24, 1918 – December 10, 1990), an early personality resea
- George Weinberg (psychologist)American psychologist
- Georgene Hoffman SewardAmerican, Early feminist psychologist
- Georgia BabladelisAmerican psychologist and academic
- Gerald DavisonAmerican psychologist and professor
- Gerald E. McClearnAmerican behavior geneticist and professor emeritus
- Gerald R. WeeksAmerican author and lecturer
- Gerard MusanteAmerican psychologist (born 1943)
- GerascophobiaAbnormal fear of growing older
- Gerhard StembergerGerhard Stemberger (born June 29, 1947, in Innsbruck, Austria) is a sociologist and Gestal
- Geri DonenbergAmerican clinical psychologist and implementation scientist
- Geriatric depression in ChinaProlonged occurrence of depression in the elderly Chinese population
- Geriatric psychologySubfield of psychology in use
- GerodiversityMulticultural approach to issues of aging
- GerontophobiaFear of growing old, or a hatred for or fear of older adults
- Gertrud L. WyattAustrian-born American psychologist (1903–1993)
- Gertrude TichoAustrian-American psychoanalyst
- Gesell's Maturational TheoryAmerican educator and psychologist
- Gestalt practiceGestalt practice is a contemporary form of personal exploration and integration developed
- Gestalt psychologyTheory of perception
- Gestalt qualitiesGestalt qualities (German: Gestaltqualitäten) are concepts found in gestalt psychology whi
- Gestalt theoretical psychotherapyType of psychotherapy
- Gestalt therapyForm of psychotherapy
- Gestalt Therapy (book)1951 book on psychotherapy
- GestaltzerfallVisual object recognition impairment
- Gestures in language acquisitionAspect of non-verbal communication
- Getting It: The Psychology of estNon-fiction book by Sheridan Fenwick
- Getting lostLosing spatial reference
- Ghost sicknessCultural belief
- Gibb categoriesInterpersonal communication strategy
- Gideon J. MellenberghDutch psychologist (1938–2021)
- Gifted Rating ScalesThe Gifted Rating Scale (GRS) is a scholastic assessment for school children. It is used m
- Gill LangleyGillian Rose Langley (born 10 August 1952) is a British scientist and writer who specialis
- Gina Simmons SchneiderAmerican therapist, author, and writer
- Girishwar MisraGirishwar Misra (born 21 April 1951) is a social scientist, psychologist and author from I
- Girl soldiersUnderage female children in the military
- Girls' toys and gamesGirls' toys and games, as opposed to boys' toys and games, are toys and games specifically
- Gish gallopRapid-fire argument rhetorical technique
- Gísli GuðjónssonIcelandic psychologist
- Giulio TononiItalian neuroscientist, psychiatrist, and professor (born 1960)
- Glasgow Outcome ScaleThe Glasgow Outcome Scale (GOS) is an ordinal scale used to assess functional outcomes of
- Glass delusionPsychiatric disorder
- Glaucous-winged gullThe glaucous-winged gull (Larus glaucescens) is a large, white-headed gull. The genus name
- Glenn Cohen (psychologist)American-Israeli psychologist
- Glenn Wilson (psychologist)British psychologist
- Global Assessment of FunctioningScale to rate how well one is meeting various problems in living
- Global Ikhwan child abuse scandalChild abuse scandal involving Global Ikhwan
- Global Initiative on PsychiatryInternational non-governmental organisation
- Global mental healthInternational perspective on mental health
- Global perceptions of autismGlobal variation of autism diagnoses, treatments, and experiences
- Global precedenceImages and other stimuli contain both local features (details, parts) and global features
- GloomLevel of light so dim that there are physiological and psychological effects
- Gloria BonderArgentinian psychologist
- Glory (honor)High renown or praise
- Glutamate hypothesis of schizophreniaHypothesis that decreased glutamatergic signalling is involved in schizophrenia
- Gluten-free, casein-free dietDiet that eliminates intake of gluten and casein
- Goal attainment scalingMethod for monitoring client progress in therapy
- Goal orientationSocial-cognitive motivational disposition
- Goal pursuitGoal pursuit is the process of attempting to achieve a desired future outcome. This genera
- Goal settingDevelopment of an action plan in order to achieve a goal
- God and Man at Georgetown Prep2005 memoir by Mark Gauvreau Judge
- God complexInflated feelings of personal ability, privilege, or infallibility
- Godinez v. Moran1993 United States Supreme Court case
- Goldberg testMedical diagnostic method
- Goldilocks principleAnalogy for optimal conditions
- Goldwater ruleRule governing how psychiatrists may give opinions on public figures
- Good cop, bad copInterrogation and negotiation tactic
- Good moral characterBeliefs and values considered beneficial to society
- Google effectInability to remember important information because of the ease of looking online
- Gordon Lee PaulAmerican clinical psychologist (1935–2014)
- Gordon Parker (psychiatrist)Australian psychiatrist
- Gordon PaskBritish psychologist and computer scientist (1928–1996)
- Gordon TurnbullPsychiatrist
- Gothenburg Study of Children with DAMPThe Gothenburg Study of Children with DAMP was a study of six-year-old children in Gothenb
- Gottfried FischerGerman psychologist (1944–2013)
- Grace FernaldAmerican psychologist
- Grada KilombaPortuguese artist and academic psychologist
- Graduated electronic deceleratorElectrical torture device
- GrandiosityUnrealistic sense of superiority and of uniqueness
- GranfalloonConcept in Kurt Vonnegut's Bokononism
- Grant StudyContinuing longitudinal study
- Grapheme–color synesthesiaSynesthesia that associates numbers or letters with colors
- GraphorrheaDisorder of incoherent written rambling
- GratificationPleasurable emotional reaction of happiness
- Gratitude trapType of cognitive distortion
- Graves's emergent cyclical levels of existenceHuman development theory
- Gray's biopsychological theory of personalityTheory of biological basis for human psychology, behavior, and personality
- Grazyna KochanskaPsychologist
- GRE Psychology TestGraduate-level standardized test in the US
- Great DisappointmentReaction to failure of Christ to appear in 1844
- Great Resignation2021–2023 surge in job quits
- Greater Kansas City and Topeka Psychoanalytic Center and InstituteThe Greater Kansas City and Topeka Psychoanalytic Center and Institute, also known as the
- Greeble (psychology)Psychological construct pertaining to facial recognition
- GreedInsatiable longing for material or immaterial gain; avarice
- Greek loveAntiquated euphemism for male homosexuality
- Greek words for loveGroup of concepts in Ancient Greek philosophy
- Green ribbonSymbol of various advocacy campaigns
- Gregory BednyUkrainian-American psychologist (1938–2018)
- Gregory D. ZimetGregory D. Zimet is an American clinical psychologist and academic researcher known for hi
- Gregory M. HerekAmerican psychologist
- Gregory ZilboorgUkrainian psychoanalyst and historian of psychiatry (1890–1959)
- GriefResponse to loss in humans and other animals
- Grief counselingTherapy for responses to loss
- GRIN2B-related neurodevelopmental disorderMedical condition
- Grisi siknisCulture-bound syndrome of Central America
- Grit (personality trait)Psychological concept
- Grooming gangs scandalSexual abuse scandal in the United Kingdom
- Gross motor skillMotor skills involving large muscle groups
- Gross-outShock effect technique in media and art
- Group (online social networking)A group (often termed as a community, e-group or club) is a feature in many social network
- Group affective toneMood of a group of people
- Group Analytic SocietyUK-based scientific learned society
- Group attribution errorCognitive bias
- Group cognitionLinguistic phenomenon
- Group emotionDisposition of a group
- Group for the Advancement of PsychiatryThe Group for the Advancement of Psychiatry (GAP) is an American professional organization
- Group polarizationTendency of a group to make more extreme decisions than the inclinations of its members
- Group Psychology and the Analysis of the Ego1921 book by Sigmund Freud
- Group psychotherapyForm of psychotherapy treatment
- GroupthinkPsychological phenomenon that occurs within a group of people
- GROW (support group)Peer support organization for mental health
- Gudela GroteGerman Psychologist and academic
- Guðmundur and Geirfinnur caseMissing persons case in Iceland
- GuessingSwift conclusion drawn from data directly at hand
- GuggingFormer psychiatric institution near Vienna, Austria
- Guided imageryMind-body therapy
- Guilt (emotion)Cognitive or an emotional experience
- Guilt-free consumptionGuilt-free consumption (GFC) is a pattern of consumption based on the minimization of the
- Gun culture in the United StatesBehaviors and attitudes about firearms in the United States
- Gunamudian David BoazIndian psychologist (1908–1965)
- Gustav Adolf WohlgemuthGustav Adolf Wohlgemuth (1 November 1868 – 2 March 1942), known as A. Wohlgemuth in his pu
- Gustav BychowskiPolish psychoanalyst (1895–1972)
- Gustav FechnerGerman experimental psychologist, physicist, and philosopher (1801–1887)
- Guusje ter HorstDutch politician and psychologist (born 1952)
- Guy Lyon PlayfairBritish writer
- Gwynne NettlerCanadian sociologist, psychologist, and stuntman
- GymnophobiaFear of or prejudice against nudity
- GynophobiaMorbid fear of women

