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Science fair " Is smiling contagious?"

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katie dawson

on 13 November 2012

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Transcript of Science fair " Is smiling contagious?"

Is Smiling Contagious? Purpose: We are doing this investigation to see if a
person smiles at you when you smile at them. Variables: Independent Variable: Genders/ men, women, kids, and old men and women. Dependent Variable: If the other person that you smiled at smiles
back. Controlled Variable: Smiling at people.
Person smiling at another person.
How many people in each age group (4). Hypothesis: We think that a lot of people will smile back
but we also think that it is most likely for a little kid or an old person to smile back. We think that smiling is contagious. Research: Three sources are: 1.Internet sites: www.articlesbase.com
www.sciencebuddies.org 2. We also went to the mall and smiled at people (strangers and non-strangers). 3. We also went to our school and on our recess and lunch break we smiled at other students. Materials: For this investigation we need: -People like women, men, young kids, and old women and men.
-Internet to research about smiling being contagious.
-We needed to go to the mall and school to smile at people. Procedure: The steps for this experiment are: 1. Make a chart for your data. Include: Gender
and age categories.
2. Choose your subjects (people).
3. Choose your location.
4. Collect your data.
5. Make your observations and conclusions from the data you collect. Observations: - When you are more familiar with people they are more likely to smile back at you.
- It was harder to make eye contact with a stranger.
- Depending on the setting (place) people will react differently. Results: This graph shows that young women and teenagers smiled the most. On one the sides of the graph it shows how many people we smiled at and who smiled back. On the graph on our backboard it shows that kids 3/4 people smiled back, teenagers 4/4 smiled back, young women 4/4 smiled back, young men 3/4 smiled back, old women 3/4 smiled back and old men 3/4 smiled back. Conclusion: Our hypothesis was partly correct because most
people did smile back (20/28). We thought that older people and young kids would smile back the most but young women and teenagers smiled back the most. We conclude that smiling contagious. Three sources of error are: 1. Knowing your subjects or not (people)
2. Your setting (place)
3. Your facial expression (smile) Yes smiling is contagious!
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