887 lines
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<div data-drupal-selector="edit-actions" class="form-actions js-form-wrapper form-wrapper" id="edit-actions"><input data-drupal-selector="edit-submit" type="submit" id="edit-submit" value="Search" class="button js-form-submit form-submit" aria-label="Search site by keywords" />
|
||
</div>
|
||
|
||
</form>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
</header>
|
||
<div id="mobile-header-nav">
|
||
<div class="nav">
|
||
<nav role="navigation" aria-labelledby="block-mainnavigation-menu" id="block-mainnavigation" class="kids-navigation">
|
||
|
||
<h2 class="visually-hidden" id="block-mainnavigation-menu">Main navigation</h2>
|
||
|
||
|
||
|
||
<div class="menu-item menu-topics menu-item--expanded menu-level-0">
|
||
<ul class="nav-topics">
|
||
<li>
|
||
<a href="/topics" class="nav-topics-a" data-drupal-link-system-path="node/2"> <div class="icon" id="topics">
|
||
<img alt="Navigation Icon, Click to Explore" src="/sites/niehs-kids/themes/custom/niehs_kids/web-resources/images/icon-nav-topics.svg" width="50" height="50">
|
||
</div>
|
||
<span class="nav-roll-forced">Topics</span>
|
||
</a>
|
||
<div class="expand_button">Expand<span class="expand_lines"></span></div>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/topics/chemicals" data-drupal-link-system-path="node/1756">Chemicals</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/topics/environment-health" data-drupal-link-system-path="node/6">Environment & Health</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/topics/healthy-living" data-drupal-link-system-path="node/7">Healthy Living</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/topics/pollution" data-drupal-link-system-path="node/16">Pollution</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/topics/reduce" data-drupal-link-system-path="node/17">Reduce, Reuse, Recycle</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/topics/how-science-works" data-drupal-link-system-path="node/18">Science – How It Works</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/topics/natural-world" data-drupal-link-system-path="node/19">The Natural World</a>
|
||
</li>
|
||
</ul>
|
||
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
<div class="menu-item menu-games menu-item--expanded menu-level-0">
|
||
<ul class="nav-games">
|
||
<li>
|
||
<a href="/games" class="nav-games-a" data-drupal-link-system-path="node/3"> <div class="icon" id="games">
|
||
<img alt="Navigation Icon, Click to Explore" src="/sites/niehs-kids/themes/custom/niehs_kids/web-resources/images/icon-nav-games.svg" width="50" height="50">
|
||
</div>
|
||
<span class="nav-roll-forced">Games</span>
|
||
</a>
|
||
<div class="expand_button">Expand<span class="expand_lines"></span></div>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/games/brainteasers" data-drupal-link-system-path="games/brainteasers">Brainteasers</a>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/brainteaser-quizzes" data-drupal-link-system-path="node/1653">Brainteaser Quizzes</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/double-speak-proverbs" data-drupal-link-system-path="node/1654">Double-Speak Proverbs!</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/matching-game" data-drupal-link-system-path="node/1657">Matching Game for NIEHS Birds!</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/puzzling-proverbs" data-drupal-link-system-path="node/1672">New Twists on Old Proverbs!</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/numbers-and-initials" data-drupal-link-system-path="node/1668">Numbers and Initials Puzzles!</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/palindromes" data-drupal-link-system-path="node/1669">Palindromes</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/parts-of-the-brain" data-drupal-link-system-path="node/1670">Parts of Your Brain, and What They Do!</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/puzzling-numbers" data-drupal-link-system-path="node/1671">Puzzling Numbers Games</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/quizzes" data-drupal-link-system-path="node/1673">Quizzes</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/rebus-puzzles" data-drupal-link-system-path="node/1685">Rebus Puzzles Brainteasers</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/tuff-stuff-riddles" data-drupal-link-system-path="node/1687">Tuff Stuff Riddles</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/scientific-dictionary" data-drupal-link-system-path="node/1686">What's That Word?</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/winter-holiday-fun" data-drupal-link-system-path="node/1688">Winter Holiday Fun</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/frog-leap" data-drupal-link-system-path="node/1655">The Frog Leap Brainteaser Game!</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/brainteasers/word-brainteasers" data-drupal-link-system-path="node/1689">Word Brainteasers</a>
|
||
</li>
|
||
</ul>
|
||
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/games/emojis" data-drupal-link-system-path="games/emojis">Emoji Games</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/games/puzzles" data-drupal-link-system-path="games/puzzles">Puzzles</a>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/at-the-farm" data-drupal-link-system-path="node/1588">At the Farm (Hidden Pictures)</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/climates-of-the-world" data-drupal-link-system-path="node/1589">Climates of the World</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/goldfish-maze" data-drupal-link-system-path="node/1590">Goldfish Maze!</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/hidden-words" data-drupal-link-system-path="node/1592">Hidden Words</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/in-the-sea" data-drupal-link-system-path="node/1593">In the Sea! (Hidden Pictures)</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/johnny-appleseed" data-drupal-link-system-path="node/1594">Johnny Appleseed (Hidden Pictures)</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/puzzling-physics" data-drupal-link-system-path="node/1595">Puzzling Physics</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/puzzling-science" data-drupal-link-system-path="node/1596">Puzzling Science</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/puzzling-space" data-drupal-link-system-path="node/1597">Puzzling Space</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/science-challenge-a-z" data-drupal-link-system-path="node/1598">Science Challenge - A to Z</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/science-scrambles-game" data-drupal-link-system-path="node/1599">Science Scrambles Game</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/scrambled-science" data-drupal-link-system-path="node/1600">Scrambled Science</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/whats-wrong" data-drupal-link-system-path="node/1601">What's Wrong with These Pictures?</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/hidden-pictures" data-drupal-link-system-path="node/1591">Wooly Mammoths (Hidden Pictures)</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/puzzles/worm-maze" data-drupal-link-system-path="node/1602">Worm Maze</a>
|
||
</li>
|
||
</ul>
|
||
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/games/riddles" data-drupal-link-system-path="games/riddles">Riddles</a>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/riddles/classroom-bloopers" data-drupal-link-system-path="node/1605">Classroom Bloopers</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/riddles/illusions" data-drupal-link-system-path="node/1606">Illusions</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/riddles/jokes" data-drupal-link-system-path="node/1629">Jokes</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/riddles/not-so-hard-riddles" data-drupal-link-system-path="node/1640">Not So Hard Riddles</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/riddles/one-or-the-other" data-drupal-link-system-path="node/1691">One or the Other</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/games/riddles/philosophically-speaking" data-drupal-link-system-path="node/1651">Philosophically Speaking</a>
|
||
</li>
|
||
</ul>
|
||
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/games/songs" data-drupal-link-system-path="node/28">Songs</a>
|
||
</li>
|
||
</ul>
|
||
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
<div class="menu-item menu-activities selected menu-item--expanded menu-item--active-trail menu-level-0">
|
||
<ul class="nav-activities">
|
||
<li>
|
||
<a href="/activities" class="nav-activities-a" data-drupal-link-system-path="node/4"> <div class="icon" id="activities">
|
||
<img alt="Navigation Icon, Click to Explore" src="/sites/niehs-kids/themes/custom/niehs_kids/web-resources/images/icon-nav-activities.svg" width="50" height="50">
|
||
</div>
|
||
<span class="nav-roll-forced">Activities</span>
|
||
</a>
|
||
<div class="expand_button">Expand<span class="expand_lines"></span></div>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/activities/be-a-scientist" data-drupal-link-system-path="node/1692">Be a Scientist</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/activities/coloring" data-drupal-link-system-path="node/1697">Coloring</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/activities/connect-the-dots" data-drupal-link-system-path="node/1857">Connect the Dots</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-1">
|
||
<li>
|
||
<a href="/activities/science-experiments" data-drupal-link-system-path="node/22">Science Experiments</a>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/activities/science-experiments/blow-the-biggest-bubbles" data-drupal-link-system-path="node/1708">Blow the Biggest Bubbles</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/activities/science-experiments/how-effective-is-your-sunscreen" data-drupal-link-system-path="node/1709">How Effective Is Your Sunscreen?</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/activities/science-experiments/illusion-experiment" data-drupal-link-system-path="node/1710" class="is-active" aria-current="page">Illusion Experiment</a>
|
||
</li>
|
||
</ul>
|
||
<ul class="subpages menu-level-2">
|
||
<li>
|
||
<a href="/activities/science-experiments/weather-experiment" data-drupal-link-system-path="node/1711">Weather Experiment</a>
|
||
</li>
|
||
</ul>
|
||
|
||
</li>
|
||
</ul>
|
||
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
<div class="menu-item menu-lessons menu-level-0">
|
||
<ul class="nav-lessons">
|
||
<li>
|
||
<a href="/lessons" class="nav-lessons-a" data-drupal-link-system-path="node/5"> <div class="icon" id="lessons">
|
||
<img alt="Navigation Icon, Click to Explore" src="/sites/niehs-kids/themes/custom/niehs_kids/web-resources/images/icon-nav-lessons.svg" width="50" height="50">
|
||
</div>
|
||
<span class="nav-roll-forced">Lessons</span>
|
||
</a>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
|
||
|
||
|
||
</nav>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
<div class="kids-body-wrapper layout-container">
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<main role="main">
|
||
|
||
<div data-drupal-messages-fallback class="hidden"></div>
|
||
|
||
<section class="kids-page-heading kids-activities-heading">
|
||
<div class="kids-heading">
|
||
<h1 class="kids-heading-title" id="main-content">Illusion Experiment</h1>
|
||
</div>
|
||
</section>
|
||
<div class="primary-section left breadcrumb-block"style="margin-top: 1rem;">
|
||
|
||
<div class="kids-breadcrumbs">
|
||
<div class="kids-breadcrumbs__item-holder">
|
||
<a class="kids-breadcrumbs__item c--ancestor" href="/">
|
||
Kids Homepage
|
||
</a>
|
||
<div class="kids-breadcrumbs__arrow"></div>
|
||
</div>
|
||
<div class="kids-breadcrumbs__item-holder">
|
||
<div class="kids-breadcrumbs__arrow c--inset"></div>
|
||
<a class="kids-breadcrumbs__item c--parent" href="/activities">
|
||
Activities
|
||
</a>
|
||
<div class="kids-breadcrumbs__arrow"></div>
|
||
</div>
|
||
<div class="kids-breadcrumbs__item-holder">
|
||
<div class="kids-breadcrumbs__arrow c--inset"></div>
|
||
<a class="kids-breadcrumbs__item c--parent" href="/activities/science-experiments">
|
||
Science Experiments
|
||
</a>
|
||
<div class="kids-breadcrumbs__arrow"></div>
|
||
</div>
|
||
<div class="kids-breadcrumbs__item-holder">
|
||
<div class="kids-breadcrumbs__arrow c--inset"></div>
|
||
<a class="kids-breadcrumbs__item c--selected" href="/activities/science-experiments/illusion-experiment">
|
||
Illusion Experiment
|
||
</a>
|
||
<div class="kids-breadcrumbs__arrow c--selected"></div>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
<div class="clearfix"></div>
|
||
<div class="margin-local-tasks">
|
||
|
||
</div>
|
||
<div class= "syndicate">
|
||
<section about="/activities/science-experiments/illusion-experiment" typeof="schema:WebPage" class="primary-section left">
|
||
<span property="schema:name" content="Illusion Experiment" class="rdf-meta hidden"></span>
|
||
|
||
<span class="node-title" id="main-content">Illusion Experiment</span>
|
||
<span class="node-sub-title">Illusion Experiment</span>
|
||
<p>Make your own illusion, and then see how many people are fooled by it.</p>
|
||
|
||
<p>All you need for this is a piece of paper, a black marker, and a ruler.</p>
|
||
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||
<p>Look at the second illusion on <a href="/games/riddles/illusions/last-three/" title="Last three!">Illusion 33</a> - (Which is longest?) You are going to draw your own version of this.</p>
|
||
|
||
<p>On the paper, draw two straight lines that are just the same length. Use the ruler to make sure that the lines are the same length. Put them a couple of inches apart.</p>
|
||
|
||
<p>Now add short lines at the top and bottom of the lines, like the letter V - for the long line on the right, make it look like arrows pointing up and down. For the other line, make the points of the V's start at each end of the long line. Check what you have drawn against the example, to make sure your V's are pointed the right way.</p>
|
||
|
||
<p>Now take a look at what you have drawn. Even though <strong>you know</strong> the two long lines are the same length, one line looks shorter than the other. That’s the illusion.</p>
|
||
|
||
<p><strong>Now for the experiment</strong>. Let’s see how many people can see that both lines are the same. When you show it to someone, ask them, “Which line is longer?”</p>
|
||
|
||
<p>Keep track of how many say -</p>
|
||
|
||
<ul>
|
||
<li>the line on the left is longer</li>
|
||
<li>the line on the right is longer</li>
|
||
<li>both lines are the same length</li>
|
||
</ul>
|
||
|
||
<p>How many boys get it right? How many girls get it right? Are girls better than boys at this? Do more older kids get it right, or are younger kids better at this?</p>
|
||
|
||
<p>If you show it to both kids and adults, who is better at seeing that it is an illusion?</p>
|
||
|
||
<p>After people guess which line is longer, you can let them use a ruler to prove to themselves that the lines are the same length.</p>
|
||
|
||
<p>Here’s another illusion you can learn how to draw yourself (thanks to Michael Sibbernsen, one of the Kids Pages' visitors).</p>
|
||
|
||
<p><span><a data-ext=".pdf" data-file="yes" href="/sites/niehs-kids/files/kids/assets/docs/learn_how_to_draw_yourself_508.pdf">Learn How to Draw Yourself</a></span></p>
|
||
|
||
<p><a href="/games/riddles/illusions/" title="Illusions">Find lots more illusions!</a></p>
|
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</section>
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<h5>Other stuff you might like ...</h5>
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<h5 class="callout-title-inner">Be a Scientist!</h5>
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