ptg6644639 From the Library of Debra Tomme 100 THINGS EVERY DESIGNER NEEDS TO KNOW ABOUT PEOPLE SUSAN WEINSCHENK, PH.D. ptg6644639 From the Library of Debra Tomme 100 Things Every Designer Needs to Know About People Susan Weinschenk, Ph.D. New Riders 1249 Eighth Street Berkeley, CA 94710 510/524-2178 510/524-2221 (fax) Find us on the Web at: www.newriders.com To report errors, please send a note to [email protected] New Riders is an imprint of Peachpit, a division of Pearson Education. Copyright © 2011 by Susan M. Weinschenk, Ph.D. Project Editor: Michael J. Nolan Development Editor: Jeff Riley Production Editor: Tracey Croom Copyeditor: Gretchen Dykstra Indexer: Joy Dean Lee Proofreader: Jan Seymour Cover Designer: Mimi Heft Interior Designer and Compositor: Maureen Forys, Happenstance Type-O-Rama Notice of Rights ptg6644639 All rights reserved. No part of this book may be reproduced or transmitted in any form by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. For information on getting permission for reprints and excerpts, contact [email protected]. Notice of Liability The information in this book is distributed on an “As Is” basis without warranty. While every precaution has been taken in the preparation of the book, neither the author nor Peachpit shall have any liability to any person or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the instructions con- tained in this book or by the computer software and hardware products described in it. Trademarks Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trade- marks. Where those designations appear in this book, and Peachpit was aware of a trademark claim, the des- ignations appear as requested by the owner of the trademark. All other product names and services identified throughout this book are used in editorial fashion only and for the benefit of such companies with no intention of infringement of the trademark. No such use, or the use of any trade name, is intended to convey endorsement or other affiliation with this book. ISBN 13: 978-0-321-76753-0 ISBN 10: 0-321-76753-5 9 8 7 6 5 4 3 2 1 Printed and bound in the United States of America From the Library of Debra Tomme ACKNOWLEDGEMENTS Many thanks to my great editing team at Peachpit, especially the late night email exchanges with Jeff Riley my development editor. Thanks to Michael Nolan (acquisitions editor) for encouraging me in writing this one and sheparding it through the process. Thanks to Guthrie Weinschenk for his photos, Maisie Weinschenk for her great ideas, and Peter Weinschenk for his support and patience. And a thank you to all those who follow my blog, come to my presentations, and in general listen to me talk about psychology. You give me valuable ideas, opinions, and are the reason I keep searching out and writing about psychology and design. ptg6644639 From the Library of Debra Tomme DEDICATION Dedicated to the memory of Miles and Jeanette Schwartz. Wish you were here to share the book with. ptg6644639 From the Library of Debra Tomme C O N T E N T S THE PSYCHOLOGY OF DESIGN vii HOW PEOPLESEE 1 WHAT YOU SEE ISN’T WHAT YOUR BRAIN GETS 2 2 PERIPHERAL VISION IS USED MORE THAN CENTRAL VISION TO GET THE GIST OF WHAT YOU SEE 5 3 PEOPLE IDENTIFY OBJECTS BY RECOGNIZING PATTERNS 7 4 THERE’S A SPECIALPART OF THE BRAIN JUST FOR RECOGNIZING FACES 9 ptg6644639 5 PEOPLE IMAGINE OBJECTS TILTEDANDATA SLIGHT ANGLEABOVE 11 6 PEOPLE SCAN SCREENS BASED ON PAST EXPERIENCEAND 13 EXPECTATIONS 7 PEOPLE SEECUES THAT TELL THEM WHAT TO DO WITH AN OBJECT 15 8 PEOPLECAN MISS CHANGES IN THEIR VISUAL FIELDS 19 9 PEOPLE BELIEVE THAT THINGS THATARECLOSE TOGETHER 21 BELONG TOGETHER 10 REDAND BLUE TOGETHERARE HARD ON THEEYES 22 11 NINEPERCENT OF MENAND ONE-HALF PERCENT OF WOMEN 23 ARECOLOR-BLIND 12 THE MEANINGS OF COLORS VARY BY CULTURE 27 CONTENTS V From the Library of Debra Tomme HOW PEOPLE READ 13 IT’S A MYTH THATCAPITAL LETTERS ARE INHERENTLY HARD TO READ 30 14 READING ANDCOMPREHENDING ARE TWO DIFFERENT THINGS 33 15 PATTERN RECOGNITION HELPSPEOPLE IDENTIFY LETTERS IN DIFFERENT FONTS 37 16 FONT SIZE MATTERS 40 17 READING ACOMPUTER SCREEN IS HARDER THAN READING PAPER 42 18 PEOPLE READ FASTER WITH A LONGER LINE LENGTH, BUT THEY PREFERA SHORTER LINE LENGTH 43 HOW PEOPLE REMEMBER 19 SHORT-TERM MEMORY IS LIMITED 46 ptg6644639 20 PEOPLE REMEMBER ONLY FOUR ITEMS AT ONCE 48 21 PEOPLE HAVE TO USE INFORMATION TO MAKE IT STICK 51 22 IT’S EASIER TO RECOGNIZE INFORMATION THAN RECALL IT 53 23 MEMORY TAKESA LOT OF MENTAL RESOURCES 54 24 PEOPLE RECONSTRUCT MEMORIESEACH TIME THEY REMEMBER THEM 56 25 IT’S A GOOD THING THATPEOPLE FORGET 58 26 THE MOST VIVID MEMORIESARE WRONG 60 HOW PEOPLE THINK 27 PEOPLEPROCESS INFORMATION BETTER IN BITE-SIZEDCHUNKS 62 28 SOME TYPES OF MENTALPROCESSING ARE MORECHALLENGING 65 THAN OTHERS 29 MINDS WANDER 30 PERCENT OF THE TIME 68 VI CONTENTS From the Library of Debra Tomme 30 THE MORE UNCERTAIN PEOPLEARE, THE MORE THEYDEFEND 70 THEIR IDEAS 31 PEOPLECREATE MENTAL MODELS 72 32 PEOPLE INTERACT WITH CONCEPTUAL MODELS 74 33 PEOPLEPROCESS INFORMATION BEST IN STORY FORM 76 34 PEOPLE LEARN BEST FROM EXAMPLES 79 35 PEOPLEAREDRIVEN TO CREATECATEGORIES 82 36 TIME IS RELATIVE 84 37 THEREARE FOUR WAYS TO BECREATIVE 86 38 PEOPLECAN BE IN A FLOW STATE 91 39 CULTUREAFFECTS HOW PEOPLE THINK 93 ptg6644639 HOW PEOPLE FOCUS THEIR ATTENTION 40 ATTENTION IS SELECTIVE 96 41 PEOPLE FILTER INFORMATION 98 42 WELL-PRACTICED SKILLS DON’T REQUIRECONSCIOUS ATTENTION 99 43 EXPECTATIONS OF FREQUENCYAFFECTATTENTION 101 44 SUSTAINEDATTENTION LASTS ABOUT TEN MINUTES 103 45 PEOPLEPAYATTENTION ONLY TO SALIENT CUES 104 46 PEOPLECAN’T ACTUALLY MULTITASK 105 47 DANGER, FOOD, SEX, MOVEMENT, FACES, AND STORIES GET THE 108 MOST ATTENTION 48 LOUD NOISES STARTLEAND GET ATTENTION 110 49 FOR PEOPLE TO PAYATTENTION TO SOMETHING, THEY MUST FIRST 112 PERCEIVE IT CONTENTS VII From the Library of Debra Tomme WHATMOTIVATES PEOPLE 50 PEOPLEARE MORE MOTIVATEDAS THEY GETCLOSER TO A GOAL 116 51 VARIABLE REWARDS AREPOWERFUL 118 52 DOPAMINE MAKES PEOPLEADDICTED TO SEEKING INFORMATION 121 53 UNPREDICTABILITY KEEPSPEOPLE SEARCHING 123 54 PEOPLEARE MORE MOTIVATED BY INTRINSIC REWARDS THAN 125 EXTRINSIC REWARDS 55 PEOPLEARE MOTIVATED BY PROGRESS, MASTERY, ANDCONTROL 127 56 PEOPLE’S ABILITY TO DELAY GRATIFICATION (OR NOT) STARTS YOUNG 131 57 PEOPLEARE INHERENTLY LAZY 132 58 PEOPLE WILL LOOK FOR SHORTCUTS ONLY IF THE 136 SHORTCUTS AREEASY ptg6644639 59 PEOPLEASSUME IT’S YOU, NOT THE SITUATION 137 60 FORMING A HABIT TAKESA LONG TIMEAND REQUIRES SMALL STEPS 139 61 PEOPLEARE MORE MOTIVATED TO COMPETE WHEN THEREARE 141 FEWERCOMPETITORS 62 PEOPLEARE MOTIVATED BY AUTONOMY 142 PEOPLE ARESOCIAL ANIMALS 63 THE “STRONG TIE” GROUP SIZE LIMIT IS 150 PEOPLE 144 64 PEOPLEARE HARD-WIRED FOR IMITATION ANDEMPATHY 147 65 DOING THINGS TOGETHER BONDSPEOPLE TOGETHER 149 66 PEOPLEEXPECT ONLINE INTERACTIONS TO FOLLOW SOCIAL RULES 151 VIII CONTENTS From the Library of Debra Tomme 67 PEOPLE LIE TO DIFFERING DEGREESDEPENDING ON THE MEDIA 154 68 SPEAKERS’ BRAINS AND LISTENERS’ BRAINS SYNC UP 156 DURING COMMUNICATION 69 THE BRAIN RESPONDS UNIQUELY TO PEOPLE YOU KNOW PERSONALLY 157 70 LAUGHTER BONDSPEOPLE TOGETHER 159 71 PEOPLECAN TELL WHENA SMILE IS REAL OR FAKE MORE 161 ACCURATELY WITH VIDEO HOW PEOPLE FEEL 72 SEVEN BASICEMOTIONS ARE UNIVERSAL 164 73 EMOTIONS ARE TIED TO MUSCLE MOVEMENT AND VICE VERSA 166 74 ANECDOTES PERSUADEMORETHAN DATA 168 ptg6644639 75 SMELLS EVOKEEMOTIONS AND MEMORIES 169 76 PEOPLEAREPROGRAMMED TO ENJOY SURPRISES 171 77 PEOPLEARE HAPPIER WHEN THEY’RE BUSY 173 78 PASTORAL SCENES MAKEPEOPLE HAPPY 175 79 PEOPLE USE LOOKAND FEELAS THEIR FIRST INDICATOR OF TRUST 177 80 LISTENING TO MUSIC RELEASESDOPAMINE IN THE BRAIN 179 81 THE MOREDIFFICULT SOMETHING IS TO ACHIEVE, THE MORE 180 PEOPLE LIKE IT 82 PEOPLE OVERESTIMATE REACTIONS TO FUTUREEVENTS 181 83 PEOPLE FEEL MOREPOSITIVE BEFOREANDAFTERANEVENT 182 THANDURING IT 84 PEOPLE WANT WHAT IS FAMILIAR WHEN THEY’RE SAD OR SCARED 184 CONTENTS IX From the Library of Debra Tomme