{"id":1418,"slug":"kang-2009-wick-candle-curiosity-caudate-fmri","title":"Kang, Camerer, Loewenstein et al. (2009), Psychological Science 20(8) — \"Wick in the Candle of Learning\": fMRI shows curiosity → caudate (reward) activity; better recall 1-2 weeks later; people spend tokens to satisfy curiosity","kind":"reference","scope":"business","status":"current","audiences":["kevin","smb-owner","candid-team"],"topics":["interactive-tool-mechanisms","curiosity-information-gap"],"reference_body":"**Claim:** **Kang et al. (2009), \"The Wick in the Candle of Learning,\" *Psychological Science* 20(8), 963-973** (Caltech / CMU team incl. Loewenstein, Camerer). fMRI while reading trivia questions: curiosity correlated with activity in **caudate regions tied to anticipated reward**; in a behavioural study people **spent scarce resources (limited tokens or waiting time)** to learn answers when more curious; curiosity predicted **better recall of surprising answers 1-2 weeks later**. Pupil dilation tracked curiosity.\n\n**Source:** Kang et al. (2009), Psychological Science.\n\n**Confidence:** Verified.\n\n**Caveat:** Reward/learning study, **not an engagement-with-tools study** — the bridge to interactive tools is inferential.\n\n**Why this matters for Candid:** Strongest single piece of neural / behavioural evidence that *unsatisfied curiosity carries motivational and memory weight*. The \"people spent tokens to learn\" finding generalises cleanly to \"users will give some friction (form fields, time) to satisfy the curiosity a tool opened.\"","rationale_body":null,"metadata":null,"links":{"outgoing":[{"slug":"loewenstein-1994-information-gap-curiosity-foundational","title":"Loewenstein (1994), Psychological Bulletin 116(1) — information-gap theory: curiosity is cognitively induced deprivation from a perceived gap in knowledge or understanding","kind":"reference","scope":"business","link_type":"depends-on"}],"incoming":[{"slug":"research-brief-engagement-mechanisms-top-up-smb-june-2026","title":"Research notes (capture-layer top-up): why interactive online tools are psychologically engaging — six additional mechanisms (June 2026)","kind":"research-notes","scope":"business","link_type":"relates-to"},{"slug":"gruber-gelman-ranganath-2014-curiosity-hippocampus-dopamine","title":"Gruber, Gelman & Ranganath (2014), Neuron 84(2) — high-curiosity states enhanced midbrain (SN/VTA) + nucleus accumbens activity; improved memory for target AND incidental information","kind":"reference","scope":"business","link_type":"relates-to"},{"slug":"curiosity-inverted-u-moderate-knowledge-finding","title":"Curiosity follows an INVERTED-U over prior knowledge/confidence — peaks at MODERATE knowing, falls when one knows nearly nothing or nearly everything (Kang 2009, Dubey-Griffiths 2020, Lee 2024)","kind":"reference","scope":"business","link_type":"depends-on"},{"slug":"caveats-engagement-mechanisms-top-up-mechanism-vs-business-outcome","title":"Caveats for the engagement-mechanisms top-up: strong independent evidence sits at the MECHANISM level not the business-outcome level; nearly every effect is moderated","kind":"reference","scope":"business","link_type":"relates-to"}]},"created_at":"2026-06-20T19:24:15.878Z","updated_at":"2026-06-20T19:24:15.878Z"}