All articles starting with I
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Impostor syndrome
Impostor syndrome, or impostor phenomenon, is the persistent inability to internalize success and fear of being exposed as a fraud, described by Clance and Imes in 1978; it is not a DSM or ICD diagnosis, affects an estimated 70% of people, and lacks a gold-standard measure.
Impractical Jokers
Impractical Jakers: American hidden-camera comedy series (truTV, 2011–; later TBS) starring Tenderloins members Q, Murr, Joe Gatto, and Sal Vulcano, who dare each other via earpiece and punish the episode's biggest loser.
Impractical Jokers season 12
Impractical Jokers season 12 (2025-2026), TBS hidden-camera comedy's twelfth season with Q, Murr, and Sal; 18 episodes, highest-rated season in the show's history, renewed for season 13.
Impractical Jokers season 13
Season 13 of TBS's Impractical Jokers, starring Quinn, Murray, and Vulcano, renewed March 2026 amid record ratings and premiered July 23, 2026 with guest Alyssa Milano.
Impractical Jokers: The Movie
Impractical Jokers: The Movie (2020) is truTV's first theatrical film, directed by Chris Henchy, starring the Tenderloins (Murray, Quinn, Gatto, Vulcano) in a Paula Abdul road-trip prank comedy; 36% Tomatometer, $10.2M US gross.
Imprecise probability
Imprecise probability is a family of mathematical models that represent uncertainty with sets of probability measures, interval probabilities, or lower and upper bounds, named in Peter Walley's 1991 book.
Impregilo
Impregilo S.p.A. was an Italian construction and civil engineering company headquartered in Milan, formed by merger in 1994, known for dams and metros worldwide, and renamed Salini Impregilo in 2014.
Impregnation (catalyst preparation)
Impregnation is a catalyst preparation method in which a porous support is contacted with a metal precursor solution, then dried and calcined; it is the oldest and most common route.
Imprensa Régia
The Imprensa Régia, also written Impressão Régia, was the royal printing office established in Rio de Janeiro in May 1808 by decree of D. João, the first press in Portuguese America.
Impresario
Impresario: organizer and manager of public entertainments, from Italian impresario (impresa, 'undertaking'); English from 1746. Originally the opera-house manager of 18th-century Italy, later an artist's agent; examples include Diaghilev and Händel.
Impression cytology
Impression cytology is a minimally invasive ophthalmology technique, introduced in 1977, that presses a filter membrane against the eye to collect superficial epithelial cells for cytological, immunological, or molecular examination.
Impression Fenglingdu Scenic Area
Impression Fenglingdu Scenic Area (印象风陵渡景区), a free-entry national AAA attraction in Fenglingdu town, Ruicheng County, Yuncheng, Shanxi, on the Yellow River Golden Triangle; eight sections, 80 °C strontium hot springs, Xihoudu site, hero locomotive.
Impression management
Impression management, or self-presentation, is the control of information to steer others' opinions, originating in Goffman's 1959 dramaturgical theory and studied via Leary and Kowalski's motivation-construction model, tactics like self-promotion and ingratiation, and measurement as socially desirable responding.
Impression, Sunrise
Impression, Sunrise (Impression, soleil levant), Claude Monet's 1872 oil of Le Havre harbor, 48 x 63 cm, now at the Musée Marmottan Monet; its title gave Impressionism its name via Louis Leroy's 1874 mock review.
Impressionism
Impressionism is an art movement known for its short, broken brushstrokes and focus on light. Artists like Claude Monet and Berthe Morisot exhibited in Paris from 1874 to 1886.
Impressionism in German literature
Impressionism in German literature (Impressionismus) was a style current around 1890–1910 in which subjective viewpoints, fleeting moments, and sensory impressions replaced the scientific objectivity of Naturalism.
Impressionism in music
Impressionism in music, or musical impressionism (impressionnisme musical), is a French late 19th/early 20th-century classical style of suggestion and atmosphere built around Debussy and Ravel, using whole-tone scales, harmony-timbre, and free forms; neither composer accepted the label.
Impressment
Impressment, carried out by press gangs, was the forced recruitment of men into the British Royal Navy, most heavily used from the 17th to early 19th centuries.
Imprimatur
An imprimatur, Latin for "let it be printed," is a Catholic bishop's authorization certifying that a work on Scripture, theology, or morals contains nothing contrary to Church teaching.
Imprimerie nationale
The Imprimerie nationale, called IN Groupe since 2018, is the French state printing office, founded in 1640, holding the state monopoly on producing passports, visas, and identity cards.
Imprint (trade name)
Imprint (trade name): the brand under which a publisher issues books, distinct from the owning company. Examples include Knopf, Penguin Classics, and Tor; tied to ISBN metadata and publisher-of-record rules.
Imprint lithography
Imprint lithography is a nanofabrication method that patterns a polymer resist by pressing a mold into it, replicating features cheaply and being tested for NAND flash chip manufacturing.
Imprinting (psychology)
Imprinting (psychology): rapid, phase-sensitive early learning establishing social preferences, classically in filial and sexual forms from Konrad Lorenz's ethology; distinct from genetic imprinting and only partly extended to human attachment.
Imprinting control region
An imprinting control region (ICR) is a cis-acting genetic regulatory element and DNA methylation mark established during gamete formation, which regulates parent-of-origin specific gene expression.
Imprinting errors
Imprinting errors: genetic or epigenetic disruptions of genomic imprinting, the parent-of-origin silencing of about 1% of human genes, causing disorders such as Prader-Willi, Angelman, Beckwith-Wiedemann, and Silver-Russell syndromes, detectable by methylation assays rather than sequencing.
Imprisonment of Imran Khan
Imprisonment of Imran Khan: detention of Pakistan's ex-PM Imran Ahmad Khan Niazi at Adiala Jail, Rawalpindi, since 2023, after Toshakhana, cipher, graft and marriage convictions, several later overturned, with UN findings of arbitrary detention.
Imprisonment of Luiz Inácio Lula da Silva
Imprisonment of Luiz Inácio Lula da Silva: the former Brazilian president's 2018–2019 detention in Curitiba after Car Wash corruption convictions, his release, and the 2021 annulment of the cases.
Improbable
Improbable is a British technology company founded in 2012 by Herman Narula and Rob Whitehead that builds software for large-scale virtual worlds, including SpatialOS and the MSquared metaverse network.
Improbably Poppy
Improbably Poppy is a six-episode 2024 surreal variety web series created by and starring musician Poppy, released on Veeps in October 2024 and on YouTube in 2025, winning the 2025 IMI Award and $50,000 prize.
Improper ferroelectricity
Improper ferroelectricity is a form of ferroelectricity where polarization arises as a secondary effect of a non-polar distortion; it was formulated by Levanyuk and Sannikov in 1974 and is typified by hexagonal manganites such as YMnO₃.