1. Are the objective and introduction written in an engaging way? Yes No     If 'No' please explain. characters left 2. Is the difficulty level accurate? Yes No     If 'No' please explain. characters left 3. Were the materials easily obtained? Yes No     If 'No' please explain. characters left 4. Was the procedure clear? Yes No      If 'No' please explain. characters left 5. Were all safety measures included? Yes No      If 'No' please explain. characters left 6. Did you obtain clear, unambiguous results? Yes No     If 'No' please explain. characters left 7. How much time did you spend on the project? Choose One... A day or less Several days About one week A couple weeks Several weeks to months 8. How much did the project cost? Choose One... Less than $20 $20 - $50 $50 - $100 $100 - $150 $150+ Optional:  Do you have any suggestions to improve this project? characters left Optional:  Attach a picture of your project (JPG, JPEG, GIF, PNG only) Optional:  Caption for picture characters left Thank you for your feedback! * Note: This is an abbreviated project idea, without notes to start your background research or a procedure for how to do the experiment. You can identify abbreviated project ideas by the asterisk at the end of the title. If you want a project idea with full instructions, please pick one without an asterisk. Abstract You've probably observed from your own personal experiences that some actions are contagious. Yawning is a great example. When one person in a room yawns, several other people usually do, too. Coughing, clearing your throat, these are other actions that often seem contagious. But what about smiling? Have you ever walked down the street and had a random stranger smile at you? Did it make you happy? Did you smile back? In this science fair project, you'll investigate whether smiling is contagious. You'll need to think of a way to design your experiment. One option would be to take a walk around a park and keep track of how many people smile at you, and whether those numbers change based on whether you smile at them or not. Or maybe you want to see if smiling has a chain reaction by having a friend walk a little ways behind you and see if the number of smiles he or she receives changes depending on whether you smile at the passersby first. However you design your experiment, make sure you're observing many people so that you can draw accurate conclusions. The Science Buddies guide Sample Size: How Many Survey Participants Do I Need? will help you determine how many observations you need to make. So put on a smile, because science is fun! Variations For more science project ideas in this area of science, see Human Behavior Project Ideas. Last edit date: 2008-10-27 22:00:00

I Did This Project! Tell us about your experience with this science project. What was the most important thing you learned? characters left What problems did you encounter? (Enter "none" if you had none.) characters left Can you suggest any improvements or ideas? (Enter "no" if you have none.) characters left How do you rate this project? Poor OK Good Very Good Excellent Optional:  Attach a picture of your project (JPG, JPEG, GIF, PNG only) Optional:  Caption for picture characters left Thank you for your feedback! Related Links Science Fair Project Guide Sample Size: How Many Survey Participants Do I Need? Project Summary Difficulty  4  Time required Average (about one week) Prerequisites None Material Availability Readily available Cost Very Low (under $20) Safety Adult supervision is recommended when collecting your data. Share this Project Idea! Donate to Science Buddies Internet Safety Tips Get educated about online safety with help from Symantec. symantec.com/norton/familyresources Motorola Solutions Foundation sponsors Summer Science Camp Resource Summer Science Camp Resource

Career Focus

If you like this project, you might enjoy exploring related careers.

	Psychologist Why people take certain actions can often feel like a mystery. Psychologists help solve these mysteries by investigating the physical, cognitive, emotional, or social aspects of human behavior and the human mind. Some psychologists also apply these findings in order to design better products or to help people change their behaviors.			Sociologist Any time there is more than one person in a room, there is potential for a social interaction to occur or for a group to form. Sociologists study these interactions—how and why groups and societies form, and how outside events like health issues, technology, and crime affect both the societies and the individuals. If you already like to think about how people interact as individuals and in groups, then you're thinking like a sociologist!

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