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- I Am Not Joey Pigza2007 book by Jack Gantos
- I-Change ModelIn psychology, the I-change model or the integrated model, for explaining motivational and
- I-messageAssertion about the feelings, beliefs, values etc. of the person speaking
- I'm Dysfunctional, You're Dysfunctional1992 book by Wendy Kaminer
- I'm OK – You're OKBook by Thomas Anthony Harris
- Ian BrockingtonBritish doctor
- Ian DearyScottish psychologist (born 1954)
- Ian NormanBritish nursing researcher and author
- Ian Phillips (philosopher)Ian B. Phillips is a British philosopher and Bloomberg Distinguished Professor of Philosop
- IBMXIBMX (3-isobutyl-1-methylxanthine), like other methylxanthine derivatives, is both a:
- Ibrahim of the Ottoman EmpireSultan of the Ottoman Empire from 1640 to 1648
- Iconic memoryComponent of the visual memory system
- IconophobiaMedical condition
- IdaenamTerm for anti-feminist young men in South Korea
- Idealization (philosophy of science)Scientific models assumption of facts
- Idealization and devaluationPsychological defense mechanism
- Ideation (creative process)Creative process of generating, developing, and communicating new ideas
- Idée fixe (psychology)Personal fixation
- Identifiable victim effectPsychological bias
- Identification (psychology)Psychological process
- Identification with the AggressorConcept in psychoanalysis
- Identified patientMember of dysfunctional family
- Identity disturbanceDeficiency or inability to maintain one or more major components of identity
- Identity fusionWhen membership in a social group begins to define one's own sense of self
- Identity negotiationSociological identity understanding process
- Ideomotor phenomenonConcept in hypnosis and psychological research
- Idiosyncrasy creditConcept in social psychology
- Idiot-proofDesigned to be proof against misuse or error
- IdlenessInactive state, usually of a person or machine
- Ignacio Martín-BaróSpanish scholar, Jesuit priest, assassinated martyr in El Salvador
- Ignacio Matte BlancoChilean psychiatrist
- Igor Smirnov (scientist)Russian scientist
- IKEA effectCognitive bias
- IkigaiGiving a sense of purpose (Japanese)
- Illicit drug use in AustraliaIllicit drug use in Australia is the recreational use of prohibited drugs in Australia. Il
- Illinois Psychological AssociationAmerican professional organization
- Illusion of asymmetric insightPsychological trait
- Illusion of controlFalse belief in an ability to control events
- Illusion of explanatory depthForm of cognitive bias
- Illusion of transparencyPsychological trait
- Illusion of validityCognitive bias
- Illusory conjunctionsPsychological effects
- Illusory contourVisual illusion evoking an edge
- Illusory correlationInaccurately perceiving a relationship between two unrelated events
- Illusory superiorityCognitive bias
- Illusory truth effectRepeating a falsity increases believability
- Illustrations of the Influence of the Mind upon the Body in Health and Disease1872 book by Daniel Hack Tuke
- Image schemaRecurring structure in cognitive processes
- Imagery rescriptingTherapeutic technique
- Imaginary audienceConcept in developmental psychology
- ImaginationCreative ability
- Imagination inflationType of memory distortion
- ImbecileArchaic psychiatric term to denote intellectual disability
- Imitative learningType of social learning
- Immature personality disorderPersonality disorder
- Immersion therapyOvercoming fears through confrontation
- Immuno-psychiatryStudy of connection between brain and immune system
- Impact of Event Scale - RevisedMedical diagnostic method
- Impact of the COVID-19 pandemic on time perceptionThe impact of the COVID-19 pandemic on time perception, or the 2020 effect, refers to the
- Impact of war on childrenThe number of children in armed conflict zones are around 250 million. They confront physi
- Implicit attitudeEvaluations that occur without conscious awareness
- Implicit bias trainingProgram to expose implicit bias and eliminate discriminatory behaviors
- Implicit cognitionImplicit cognition refers to cognitive processes that occur outside conscious awareness or
- Implicit learningUnintentional learning of complex information
- Implicit memoryType of long-term human memory
- Implicit personality theoryImplicit personality theory describes the specific patterns and biases an individual uses
- Implicit Relational Assessment ProcedureComputer-based psychological measure
- Implicit self-esteemCharacteristic of human disposition
- Implicit stereotypeUnreflected, mistaken attributions to and descriptions of social groups
- Implicit theories of intelligenceConcepts in social and developmental psychology
- Implicit-association testPsychological experiment
- Impostor syndromePsychological pattern
- Impregnation fetishismSexual fetish
- Impression managementProcess to attempt to influence perceptions
- Imprinted brain hypothesisConjecture on the causes of autism and psychosis
- Improving Access to Psychological TherapiesImproving Access to Psychological Therapies (IAPT), also known as NHS Talking Therapies, f
- Impulse-control disorderClass of mental disorders characterized by an inability to resist temptations or urges
- ImpulsivityTendency to act on a whim without considering consequences
- In-group favoritismPsychological bias towards favoring members of one's in-group
- Iñaki PiñuelSpanish psychologist (born 1965)
- Inattentional blindnessCondition of failing to see something in plain view
- Incarceration in NorwayIncarceration in Norway is one of the primary forms of punishment and rehabilitation for i
- Incarceration prevention in the United StatesMethods to reduce prison populations in America
- IncelOnline subculture
- Incentive-centered designSystems-design paradigm
- IncentivisationUse of rewards as motivation
- Incest between twinsIncest between twins or "twincest" is a subclass of sibling incest and includes both heter
- Incest in literatureIncest is an important thematic element and plot device in literature, with famous early e
- Incidental memoryIncidental memory is defined as the ability to acquire and recall information that was uni
- IncivilitySocial behaviour lacking in civility or good manners
- Incubation (psychology)Unconscious processing of problems
- Indian Predator: The Butcher of Delhi2022 Netflix Indian docuseries
- Indian Predator: The Diary of a Serial Killer2022 Netflix Indian docuseries
- Indigenous identity fraud in Canada and the United StatesIndigenous identity fraud is the practice of non-Indigenous people incorrectly claiming In
- Indigenous psychologyStudy of human behaviors native to the region
- Indigo childrenChildren who are believed to possess special traits or abilities
- Indirect tests of memoryType of psychological experiment
- Inequality by Design1996 book
- Inequity aversionPreference for fairness and resistance to incidental inequalities
- Infant cognitive developmentHow babies develop the ability to think and know things
- Infant Potty TrainingBook by Laurie Boucke
- InfantilizationTreating someone as if they were younger
- Inference-based therapyTreatment for OCD
- Inferiority complexIntense feeling of inadequacy and inferioriority
- Infertility and childlessness stigmasForm of social judgment
- Influence diagrams approachInfluence Diagrams Approach (IDA) is a technique used in the field of Human reliability As
- Influence of childhood trauma in psychopathyThe influence of childhood trauma on the development of psychopathy in adulthood remains a
- Influence: Science and PracticePsychology book by Robert Cialdini
- InfodemicRapid spread of accurate and inaccurate information
- InfomaniaInfomania is the debilitating state of information overload, caused by the combination of
- Information deficit modelTheory in science communication
- Information integration theoryInformation integration theory was proposed by Norman H. Anderson to describe and model ho
- Information metabolismPsychological theory of interaction between biological organisms and their environment
- Information overloadDecision making with too much information
- Information processing (psychology)Approach to understanding human thinking
- Information processing theoryApproach to the study of cognitive development
- Infradian rhythmBiological rhythm longer than 24 hours
- InfrahumanisationBelief that one's group is more human than other groups
- Inger SkjelsbækGender studies scholar
- Inglehart–Welzel cultural map of the worldScatter plots of several countries's societies
- IngratiationAttempt to influence someone else by increasing their attractiveness
- Inhibitory controlCognitive process
- Ink blot testPersonality test
- Inka DowlaszPolish screenwriter
- Inma PuigSpanish sports psychologist
- Inner childIn psychology, a person's childlike aspect
- Inner criticConcept in psychology
- Inner peaceDeliberate psychological or spiritual calm
- Inner Relationship FocusingPsychotherapeutic system
- InnocenceAbsence of guilt, also a legal term, and a lack of experience
- Inquiry-based learningForm of active learning
- InsanityAbnormal mental or behavioral patterns
- Insanity defenseLegal concept regarding a defendant's state of mind
- Insanity in English lawDefense in English criminal law
- Insensitivity to sample sizeCognitive bias
- Insight-oriented psychotherapyCategory of psychotherapy relying on conversation
- Instinctive driftTendency of an animal to revert to unconscious and automatic behaviour
- Institute for International and Cross-Cultural PsychologyThe Institute for International and Cross-Cultural Psychology (IICCP) at St. Francis Colle
- Institutional abuseMistreatment of a person from a system of power
- Institutional Animal Care and Use CommitteeInstitutional Animal Care and Use Committees (IACUCs) are centrally important in applying
- Institutional betrayalAbuse of its dependents by an institution
- Institutional psychotherapyFrench psychiatric reform movement
- Institutional syndromePsychology concept
- Instituto Ayrton SennaBrazilian non-governmental organization
- Insufficient justificationSocial psychology phenomenon
- Insulin shock therapyPsychiatric treatment
- Intake interviewType of interview in clinical psychology
- Integral theoryFramework for integrating diverse theories
- Integrative behavioral couples therapyBehavioral marital therapy, sometimes called behavioral couples therapy, has its origins i
- Integrative complexityResearch psychometric
- Integrative psychotherapyIntegration of different methods of psychotherapy
- IntellectFaculty of the human mind
- Intellectual curiosityCuriosity leading to acquisition of knowledge
- Intellectual humilityRecognition of the limit of one's knowledge
- Intellectual opportunismIntellectual opportunism is the pursuit of intellectual opportunities with a selfish, ulte
- IntellectualizationPsychological defense mechanism
- IntelligenceAbility to perceive, infer, retain or apply information
- Intelligence (journal)Academic journal
- Intelligence amplificationUse of information technology to augment human intelligence
- Intelligence and personalityStudies into the ties between these aspects
- Intelligence and public policyInteractions between intelligence testing and public policy
- Intelligence in Nature2015 non-fiction book by Jeremy Narby
- Intelligent disobedienceService animals disobeying instructions to assist their handler
- Intelligent tutoring systemComputer system to provide instruction to learners
- Intensive interactionMethod of teaching communication to people with severe learning issues
- Intensive short-term dynamic psychotherapyPsychotheraputic technique
- Inter-rater reliabilityMeasure of consensus in ratings given by multiple observers
- Interactionism (nature versus nurture)View that behavior develops from both
- Interamerican Psychological SocietyOrganization of psychologists in Western Hemisphere
- Intercultural communicative competence in computer-supported collaborative learningInternationally dispersed online learning
- Interest (emotion)Feeling that causes attention to focus on an object, event or process
- Intergroup dialogueIntergroup dialogue is a "face-to-face facilitated conversation between members of two or
- Intergroup relationsAspect of organizational theory
- Interindividual differences in perceptionEffect of external factors on perception
- Interior design psychologyBranch of environmental psychology
- IntermetamorphosisMedical condition
- Intermittent explosive disorderMental disorder characterized by anger
- Internal Family Systems ModelPsychotherapeutic modality focusing on internal parts and Self-leadership
- Internal working model of attachmentPsychological approach
- Internalizing disorderType of emotional and behavioral disorder
- International Affective Picture SystemPicture database on emotion and attention
- International Association for the Cognitive Science of ReligionCognitive science organization
- International Association of Empirical AestheticsOrganization in France
- International Association of MemoryThe International Association of Memory (IAM) is an international organization that connec
- International child abductionForm of human trafficking
- International Day of HappinessCelebrated day
- International Dyslexia AssociationThe International Dyslexia Association (IDA) is a non-profit education and advocacy organi
- International Early Intervention and Prevention in Mental Health AssociationThe International Early Intervention and Prevention in Mental Health Association (IEPA), i
- International Journal of PsychologyAcademic journal
- International Personality Item PoolCollaboratory of public domain personality test items
- International Psychoanalytical AssociationInternational organization
- International Social Survey ProgrammeStatistical Survey
- International Society for Justice ResearchThe International Society for Justice Research is an interdisciplinary scholarly scientifi
- International Society for Research in Child and Adolescent PsychopathologyInternational psychopathology research organization
- International Society for the Study of Behavioural DevelopmentInternational human development learned society
- International Society for the Study of Trauma and DissociationNonprofit professional organization in the U.S.
- International Society of Political PsychologyThe International Society of Political Psychology (ISPP) is an interdisciplinary not-for-p
- International Test CommissionThe International Test Commission (ITC) is an association of national psychological associ
- International Union of Psychological ScienceInternational umbrella organization of national psychology associations
- Internet addiction in the United StatesInternet addiction in the United States, consisting of online gambling, social media, and
- Internet relationshipRelationship between people who have met online
- Internet sex addictionBehavioral addiction
- InteroceptionSensory system that receives and integrates information from the body
- Interoceptive exposureCognitive behavioral therapy technique used to treat panic disorder
- InterpassivitySocial concept
- Interpersonal adaptation theoryInterpersonal (or interaction) adaptation theory (IAT) is often referred to as a theory of
- Interpersonal deception theoryCommunications theory
- Interpersonal emotion regulationProcess of changing the emotional experience of oneself or another's through interaction
- Interpersonal perceptionInterpersonal perception is an area of research in social psychology which examines the be
- Interpersonal psychoanalysisPsychological method
- Interpersonal psychotherapyAttachment-focused psychotherapy
- Interpersonal Reactivity IndexPsychological measure of empathy
- Interpersonal theory of suicideSuicide theory of Thomas Joiner
- Interpretation of Schizophrenia1955 book by Silvano Arieti
- Interpretative phenomenological analysisApproach to qualitative psychological research
- Interpretive biasInterpretive bias or interpretation bias is an information-processing bias, the tendency t
- Interrogational tortureUse of torture to obtain information in interrogation
- Interstimulus intervalThe interstimulus interval (often abbreviated as ISI) is the temporal interval between the
- IntersubjectivityConcept in philosophy and psychology
- IntertextualityShaping of a text's meaning by another text in literary studies
- Intertrial primingPsychological effect
- IntertwingularityCoined term by Ted Nelson in 1974
- Intimate partner sexual violenceIntimate partner sexual violence (IPSV) deals with sexual violence within the context of d
- Intimate partner violence and U.S. military populationsIntimate partner violence (IPV) is defined as physical and sexual violence or threat of vi
- IntimidationDeterring or coercing someone
- Intragroup conflictConflict between members of a group or team
- Intrapersonal communicationCommunication with oneself
- Intrapsychic humanismIntrapsychic humanism is a comprehensive general psychology and philosophy of mind that pr
- Introduction to PsychoanalysisSet of lectures by Sigmund Freud
- IntrojectionPsychological process
- IntrospectionExamining one's own thoughts and feelings
- Introspection illusionCognitive bias
- Intrusive thoughtUnwelcome involuntary thought, image or idea
- Intuitive–instrumental griefIntuitive grief and instrumental grief are two patterns of grieving styles identified by p
- Investigative psychologyIn applied psychology, investigative psychology attempts to describe the actions of offend
- Invisible disabilityDisability that is not immediately noticeable to others
- Invisible supportIn psychology, invisible support is a type of social support in which supportive exchanges
- Involuntary commitmentCompulsory hospitalization
- Involuntary commitment by countryInvoluntary commitment or civil commitment is a legal process through which an individual
- Involuntary hospitalization of Joyce Brown1987 committal in New York
- Involutional melancholiaHistorical psychiatric diagnosis
- Iowa Child Welfare Research StationChild development research center
- Iowa gambling taskPsychology test
- IpsativeAttribute of a survey scoring scale
- IQ and Global Inequality2006 book by Richard Lynn and Tatu Vanhanen
- IQ and the Wealth of Nations2002 book by Richard Lynn
- IQ classificationCategorisation of people's intelligence based on IQ
- Ira HymanProfessor of psychology, mostly focused on human memory
- Irene Claremont de CastillejoIrene Claremont de Castillejo (born in London, 1885 – died in London 1967) was a writer an
- Irene Hanson FriezeAmerican psychologist and academic
- Iris BerentIsraeli-American settler psychologist
- Iris MaussSocial psychologist
- Irlen syndromeProposed vision disorder
- Irma Brenman PickSouth African-British psychologist and psychoanalyst (1934–2023)
- Irma's injectionDream analysed by Sigmund Freud
- Ironic process theoryInability of the mind to avoid thinking unwanted thoughts or emotions
- Irrsinnig MenschlichIrrsinnig Menschlich (Madly Human) is an international non-profit organisation focused on
- Irvin S. SchonfeldAmerican psychologist and academic
- Irving BieberAmerican psychoanalyst (1909–1991)
- Irving KirschIrving Kirsch (born March 7, 1943) is an American psychologist and academic. He is the Ass
- Irwin BergAmerican psychologist (1913–2001)
- Irwin BernsteinAmerican psychologist and primatologist
- Is Sex Necessary? Or, Why You Feel the Way You Do1929 spoof book of essays by E.B. White and James Thurber
- Isabel LythPsychoanalyst and social scientist
- Isabelle AlfandaryFrench philosopher, literary historian and psychoanalyst
- Isabelle KendigClinical psychologist
- Isador CoriatAmerican psychiatrist and neurologist
- IshqArabic word meaning 'love' or 'passion'
- Isidor CheinIsidor Chein (March 12, 1912 – April 18, 1981) was a noted psychologist. A native to New Y
- Islam and domestic violenceThe relationship between Islam and domestic violence is disputed. Even among Muslims, the
- Islam and mental healthDespite a rich history of mental health advancements in the Islamic world, particularly du
- Isoko HatanoJapanese psychologist (1905-1978)
- Isolation (psychology)Defence mechanism
- Isolation tankSensory deprivation tank
- Issue treeGraphical breakdown for problem solving
- Issue-based information systemArgumentation scheme
- Item response theoryParadigm for the design, analysis, and scoring of tests
- Ivan SechenovRussian physiologist and psychologist (1829–1905)