--- title: "Meaning & Key Takeaway of: pupils are sensitive indicators of mental…" description: "\"“pupils are sensitive indicators of mental effort—”\" — Daniel Kahneman" image: "https://sms4smile.com/quotes/i/621/daniel-kahneman-431_education_pupils-are-sensitive-indicators-of-menta_3150717.jpg" --- # pupils are sensitive indicators of mental effort— ![“pupils are sensitive indicators of mental effort—” quote by Daniel Kahneman](https://sms4smile.com/quotes/i/621/daniel-kahneman-431_education_pupils-are-sensitive-indicators-of-menta_3150717.jpg) [Download](https://sms4smile.com/quotes/i/621/daniel-kahneman-431_education_pupils-are-sensitive-indicators-of-menta_3150717.jpg) [Open image](https://sms4smile.com/quotes/i/621/daniel-kahneman-431_education_pupils-are-sensitive-indicators-of-menta_3150717.jpg) > ““pupils are sensitive indicators of mental effort—”” [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Pupils dilate when the brain works hard, serving as a physiological cue of mental effort. **In simple terms:** Pupil size reflects how much mental work is happening. Key Takeaway Notice pupil changes to gauge cognitive load. Themes cognition physiology attention Mood analytical curious Type scientific educational When to use this quote - studying concentration - designing user interfaces - monitoring fatigue Key Concepts mental effort biometrics Questions to Reflect On - How can we differentiate effort from lighting effects? - What tasks cause the most pupil dilation? A Different Perspective Pupil changes can be subtle and influenced by light. ★ ★ ★ ★ ★ No ratings yet [Education](https://sms4smile.com/quotes/about/education/) [Effort](https://sms4smile.com/quotes/about/effort/) [Indicators Mental](https://sms4smile.com/quotes/about/indicators-mental-5654744/) [Mental Effort](https://sms4smile.com/quotes/about/mental-effort-1386756/) [Psychology](https://sms4smile.com/quotes/about/psychology/) [Pupils](https://sms4smile.com/quotes/about/pupils/) [Pupils Sensitive](https://sms4smile.com/quotes/about/pupils-sensitive-5654743/) ## Related quotes > [Mental effort, I would argue, is relatively rare. Most of the time we coast.](https://sms4smile.com/quotes/daniel-kahneman/mental-effort-i-would-argue-is-relatively-rare-most-of-the-time-we/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [Someone has said that it requires less mental effort to condemn than to think.](https://sms4smile.com/quotes/emma-goldman/someone-has-said-that-it-requires-less-mental-effort-to-condemn-than/) [Emma Goldman](https://sms4smile.com/quotes/author/emma-goldman/) > [People are misers of mental effort. If we don't have the interest or the capacity to look into the arguments, if the message isn't…](https://sms4smile.com/quotes/kyle-hill/people-are-misers-of-mental-effort-if-we-don-t-have-the-interest-or/) [Kyle Hill](https://sms4smile.com/quotes/author/kyle-hill/) > [“I still have this nagging feeling that I'm supposed to know stuff without actually learning it, and that anything requiring a mental effort beyond…](https://sms4smile.com/quotes/quinn-cummings/i-still-have-this-nagging-feeling-that-i-m-supposed-to-know-stuff/) [Quinn Cummings](https://sms4smile.com/quotes/author/quinn-cummings/) > [The more mental effort he made the clearer he saw that it was undoubtedly so: that he had really forgotten and overlooked one little…](https://sms4smile.com/quotes/leo-tolstoy/the-more-mental-effort-he-made-the-clearer-he-saw-that-it-was/) [Leo Tolstoy](https://sms4smile.com/quotes/author/leo-tolstoy/) > [“Mental effort moves us into higher gear, activating more vigorous and more analytical brain machinery.”](https://sms4smile.com/quotes/nassim-nicholas-taleb/mental-effort-moves-us-into-higher-gear-activating-more-vigorous-and/) [Nassim Nicholas Taleb](https://sms4smile.com/quotes/author/nassim-nicholas-taleb/) > [The best mental effort in the game of business is concentrated on the major problem of securing the consumer's dollar before the other fellow…](https://sms4smile.com/quotes/stuart-chase/the-best-mental-effort-in-the-game-of-business-is-concentrated-on-the/) [Stuart Chase](https://sms4smile.com/quotes/author/stuart-chase/) > [“It requires less mental effort to condemn than to think.”](https://sms4smile.com/quotes/emma-goldman/it-requires-less-mental-effort-to-condemn-than-to-think/) [Emma Goldman](https://sms4smile.com/quotes/author/emma-goldman/) > [Even if nothing worse than wasted mental effort could be laid to the charge of theology, that alone ought to be sufficient to banish…](https://sms4smile.com/quotes/lydia-m-child/even-if-nothing-worse-than-wasted-mental-effort-could-be-laid-to-the/) [Lydia M. Child](https://sms4smile.com/quotes/author/lydia-m-child/) > [If you can attribute your success entirely to your own mental effort, to your own attitude, to some spiritual essence that you have that…](https://sms4smile.com/quotes/barbara-ehrenreich/if-you-can-attribute-your-success-entirely-to-your-own-mental-effort/) [Barbara Ehrenreich](https://sms4smile.com/quotes/author/barbara-ehrenreich/) > [The desire to economize time and mental effort in arithmetical computations, and to eliminate human liability to error is probably as old as the…](https://sms4smile.com/quotes/howard-aiken/the-desire-to-economize-time-and-mental-effort-in-arithmetical/) [Howard Aiken](https://sms4smile.com/quotes/author/howard-aiken/) > [The human doesnt need mental effort or even a brain to have faith. It is not an emotion. Faith is a natural state of…](https://sms4smile.com/quotes/ruben-papian/the-human-doesnt-need-mental-effort-or-even-a-brain-to-have-faith-it/) [Ruben Papian](https://sms4smile.com/quotes/author/ruben-papian/) > [In proportion to the mental energy he spent, the man who creates a new invention receives but a small percentage of his value in…](https://sms4smile.com/quotes/ayn-rand/in-proportion-to-the-mental-energy-he-spent-the-man-who-creates-a-new/) [Ayn Rand](https://sms4smile.com/quotes/author/ayn-rand/) > [Your success will be proportioned to the amount of mental effort you devote to it.](https://sms4smile.com/quotes/t-e-lawrence/your-success-will-be-proportioned-to-the-amount-of-mental-effort-you/) [T. E. Lawrence](https://sms4smile.com/quotes/author/t-e-lawrence/) > [To make a commencement requires a mental effort.](https://sms4smile.com/quotes/seneca-the-younger/to-make-a-commencement-requires-a-mental-effort/) [Seneca the Younger](https://sms4smile.com/quotes/author/seneca-the-younger/) ## More by Daniel Kahneman > [Economists think about what people ought to do. Psychologists watch what they actually do.](https://sms4smile.com/quotes/daniel-kahneman/economists-think-about-what-people-ought-to-do-psychologists-watch/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“Belief in the Law of Small Numbers.”](https://sms4smile.com/quotes/daniel-kahneman/belief-in-the-law-of-small-numbers/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“People who are poor think like traders, but the dynamics are quite different. Unlike traders, the poor are not indifferent to the differences between…](https://sms4smile.com/quotes/daniel-kahneman/people-who-are-poor-think-like-traders-but-the-dynamics-are-quite/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“Mood evidently affects the operation of System 1: when we are uncomfortable and unhappy, we lose touch with our intuition.”](https://sms4smile.com/quotes/daniel-kahneman/mood-evidently-affects-the-operation-of-system-1-when-we-are/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [The confidence that individuals have in their beliefs depends mostly on the quality of the story they can tell about what they see, even…](https://sms4smile.com/quotes/daniel-kahneman/the-confidence-that-individuals-have-in-their-beliefs-depends-mostly/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“So this is my aim for watercooler conversations: improve the ability to identify and understand errors of judgment and choice, in others and eventually…](https://sms4smile.com/quotes/daniel-kahneman/so-this-is-my-aim-for-watercooler-conversations-improve-the-ability/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“For example, I recently came to doubt my long-held impression that adultery is more common among politicians than among physicians or lawyers.”](https://sms4smile.com/quotes/daniel-kahneman/for-example-i-recently-came-to-doubt-my-long-held-impression-that/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [Survival prospects are poor for an animal that is not suspicious of novelty.](https://sms4smile.com/quotes/daniel-kahneman/survival-prospects-are-poor-for-an-animal-that-is-not-suspicious-of/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“the idea of money primes individualism: a reluctance to be involved with others, to depend on others, or to accept demands from others.”](https://sms4smile.com/quotes/daniel-kahneman/the-idea-of-money-primes-individualism-a-reluctance-to-be-involved/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [Most of the moments of our life - and I calculated, you know, the psychological present is said to be about three seconds long;…](https://sms4smile.com/quotes/daniel-kahneman/most-of-the-moments-of-our-life-and-i-calculated-you-know-the/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“knowing little makes it easier to fit everything you know into a coherent pattern.”](https://sms4smile.com/quotes/daniel-kahneman/knowing-little-makes-it-easier-to-fit-everything-you-know-into-a/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [Experts don't know exactly where the boundaries of their expertise are.](https://sms4smile.com/quotes/daniel-kahneman/experts-don-t-know-exactly-where-the-boundaries-of-their-expertise-are/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [All of us would be better investors if we just made fewer decisions.](https://sms4smile.com/quotes/daniel-kahneman/all-of-us-would-be-better-investors-if-we-just-made-fewer-decisions/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“The best we can do is a compromise: learn to recognize situations in which mistakes are likely and try harder to avoid significant mistakes…](https://sms4smile.com/quotes/daniel-kahneman/the-best-we-can-do-is-a-compromise-learn-to-recognize-situations-in/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) > [“A happy mood loosens the control of System 2 over performance: when in a good mood, people become more intuitive and more creative but…](https://sms4smile.com/quotes/daniel-kahneman/a-happy-mood-loosens-the-control-of-system-2-over-performance-when-in/) [Daniel Kahneman](https://sms4smile.com/quotes/author/daniel-kahneman/) [Explore all 560 Daniel Kahneman quotes ](https://sms4smile.com/quotes/author/daniel-kahneman/) ## More Education quotes > [I put myself in the student's place and remember the frustrations, doubts, determination, and desires I felt when I was going through the initial…](https://sms4smile.com/quotes/ted-martinez/i-put-myself-in-the-student-s-place-and-remember-the-frustrations/) [Ted Martinez](https://sms4smile.com/quotes/author/ted-martinez/) > [“In school you are taught to obey and not to think straight for your own good. Otherwise the world would be full of millionaires…](https://sms4smile.com/quotes/mwanandeke-kindembo/in-school-you-are-taught-to-obey-and-not-to-think-straight-for-your/) [Mwanandeke Kindembo](https://sms4smile.com/quotes/author/mwanandeke-kindembo/) > [For successful education there must always be a certain freshness in the knowledge dealt with. It must be either new in itself or invested…](https://sms4smile.com/quotes/alfred-north-whitehead/for-successful-education-there-must-always-be-a-certain-freshness-in/) [Alfred North Whitehead](https://sms4smile.com/quotes/author/alfred-north-whitehead/) > [Where I grew up, learning was a collective activity. But when I got to school and tried to share learning with other students that…](https://sms4smile.com/quotes/henry-giroux/where-i-grew-up-learning-was-a-collective-activity-but-when-i-got-to/) [Henry Giroux](https://sms4smile.com/quotes/author/henry-giroux/) > [There's no authoritarian structure at Reed College, but the education is conservative. So what you have is a lot of students who are very…](https://sms4smile.com/quotes/donald-miller/there-s-no-authoritarian-structure-at-reed-college-but-the-education/) [Donald Miller](https://sms4smile.com/quotes/author/donald-miller/) > [“What's the best thing about being in college? Good teachers. They inspire you, they entertain you, and you end up learning a ton even…](https://sms4smile.com/quotes/nicholas-sparks/what-s-the-best-thing-about-being-in-college-good-teachers-they/) [Nicholas Sparks](https://sms4smile.com/quotes/author/nicholas-sparks/) > [“If one has not a head of steel it will burst; if he has not within it a brain of liquid quicksilver, he will…](https://sms4smile.com/quotes/ioannes-amos-commenius/if-one-has-not-a-head-of-steel-it-will-burst-if-he-has-not-within-it/) [Ioannes Amos Commenius](https://sms4smile.com/quotes/author/ioannes-amos-commenius/) > [“let us not teach / what we have learned badly / and not profited by”](https://sms4smile.com/quotes/h-d-hilda-doolittle/let-us-not-teach-what-we-have-learned-badly-and-not-profited-by/) [H.D. (Hilda Doolittle](https://sms4smile.com/quotes/author/h-d-hilda-doolittle/) > [“It took me years to learn to sit at my desk for more than two minutes at a time, to put up with the…](https://sms4smile.com/quotes/erica-jong/it-took-me-years-to-learn-to-sit-at-my-desk-for-more-than-two-minutes/) [Erica Jong](https://sms4smile.com/quotes/author/erica-jong/) > [According to Plato, we don't learn anything. Our soul has lived so many lives that we know everything. Teachers and education can only remind…](https://sms4smile.com/quotes/chuck-palahniuk/according-to-plato-we-don-t-learn-anything-our-soul-has-lived-so-many/) [Chuck Palahniuk](https://sms4smile.com/quotes/author/chuck-palahniuk/) > [“I only began to enjoy studying after I got through the educational system and became a so-called member of society. If something interested me,…](https://sms4smile.com/quotes/anonymous/i-only-began-to-enjoy-studying-after-i-got-through-the-educational/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [If you had made the acquiring of ignorance the study of your life, you could not have graduated with higher honor than you could…](https://sms4smile.com/quotes/mark-twain/if-you-had-made-the-acquiring-of-ignorance-the-study-of-your-life-you/) [Mark Twain](https://sms4smile.com/quotes/author/mark-twain/) > [How wonderful it would be, I thought, if only we could practice the teachings of the Buddha as he really taught them from his…](https://sms4smile.com/quotes/dzogchen-ponlop-rinpoche/how-wonderful-it-would-be-i-thought-if-only-we-could-practice-the/) [Dzogchen Ponlop Rinpoche](https://sms4smile.com/quotes/author/dzogchen-ponlop-rinpoche/) > [English teachers tend to put more thought in the books than the author did](https://sms4smile.com/quotes/anonymous/english-teachers-tend-to-put-more-thought-in-the-books-than-the/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [When will society, like a mother, take care of all her children?](https://sms4smile.com/quotes/horace-mann/when-will-society-like-a-mother-take-care-of-all-her-children/) [Horace Mann](https://sms4smile.com/quotes/author/horace-mann/) [Browse all 37,666 Education quotes ](https://sms4smile.com/quotes/about/education/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "“pupils are sensitive indicators of mental effort—”", "creator": { "@type": "Person", "name": "Daniel Kahneman" }, "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "url": "https://sms4smile.com/quotes/daniel-kahneman/pupils-are-sensitive-indicators-of-mental-effort/", "about": { "@type": "Thing", "name": "Education" }, "@id": "https://sms4smile.com/quotes/daniel-kahneman/pupils-are-sensitive-indicators-of-mental-effort/#quotation", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/621/daniel-kahneman-431_education_pupils-are-sensitive-indicators-of-menta_3150717.jpg", "contentUrl": "https://sms4smile.com/quotes/i/621/daniel-kahneman-431_education_pupils-are-sensitive-indicators-of-menta_3150717.jpg", "url": "https://sms4smile.com/quotes/i/621/daniel-kahneman-431_education_pupils-are-sensitive-indicators-of-menta_3150717.jpg", "width": 1080, "height": 1080, "caption": "“pupils are sensitive indicators of mental effort—” — Daniel Kahneman", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } }, { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://sms4smile.com/" }, { "@type": "ListItem", "position": 2, "name": "Quotes", "item": "https://sms4smile.com/quotes/" }, { "@type": "ListItem", "position": 3, "name": "Daniel Kahneman", "item": "https://sms4smile.com/quotes/author/daniel-kahneman/" }, { "@type": "ListItem", "position": 4, "name": "“pupils are sensitive indicators of mental...", "item": "https://sms4smile.com/quotes/daniel-kahneman/pupils-are-sensitive-indicators-of-mental-effort/" } ], "@id": "https://sms4smile.com/quotes/daniel-kahneman/pupils-are-sensitive-indicators-of-mental-effort/#breadcrumb" }, { "@type": "WebSite", "@id": "https://sms4smile.com/quotes/#website", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "publisher": { "@id": "https://sms4smile.com/quotes/#organization" } }, { "@type": "Organization", "@id": "https://sms4smile.com/quotes/#organization", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "logo": { "@type": "ImageObject", "url": "https://sms4smile.com/quotes/wp-content/themes/sq/assets/icons/icon-512.png", "width": 512, "height": 512 } } ] } ```