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# Is Sensitivity Heightened on your dominant side?

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## Journey Scott

on 3 April 2014

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#### Transcript of Is Sensitivity Heightened on your dominant side?

Is Sensitivity Heightened in Your Dominant Hand?
Hypothesis
If both hands are placed in ice water, then the dominant side will be more sensitive, because it has more sensitive nerve endings than the non-dominant hand.
The independent variable is the handedness of each person.
The dependent variable is the sensitivity of each hand.
Experimental Procedure
1. Fill the bowl with ice water.
2. Ask a test subject to place both hands in the bowl. Instruct the test subject to keep his or her hands in the bowl as long as possible. Tell the test subject to remove one or both hands when the discomfort becomes too much to bear. Both hands do not have to be removed at the same time.
4. Record how long the subject is able to keep each hand in the bowl of ice water.
5. Record whether the test subject is right-handed or left-handed.
6. Repeat steps 2-5 for the different right-handed and left-handed test subjects.
7. Analyze your results. Did right-handed participants tend to remove their right hand from the water before their left hand? Did left-handed participants keep their right hand in the ice water longer than their left hand?
Data Table
Conclusion
I hypothesized that i
f both hands are placed in ice water, then the dominant side will be more sensitive, because even though it is stronger and more coordinated it has more sensitive nerve ending than the non-dominant hand.
My hypothesis was rejected by the data I collected. Based on my results I have concluded that sensitivity is not heightened on your dominant hand but on your non-dominant hand. In my experiment the dominant hand was always left in longer even if only for a few seconds. I learned that your dominant hand is less sensitive than your non-dominant hand.
Materials
Left-handed and right-handed test subjects

A bowl that is big enough to fully submerge both hands

Ice water

Stop watch

Notebook and writing tool for recording results
Is Sensitivity Heightened on your dominant side?
The objective of this experiment is to test whether a persons dominant hand is more sensitive that their non-dominant hand. This experiment appealed to me because I know that the dominant hand is stronger and more coordinated, but I wanted to find out if it is more sensitive.
Bibliography
THANK YOU!!!
Handedness | Time right hand remained submerged, left hand
__________________________________________________________
Left | 33.4, 35.3
Right #1 | 18.6, 16.4
Right #2 | 45.3, 45.3
Data Analysis
Most test subjects were able to keep their dominant hand submerged in the ice water for a longer period of time. When the test subjects' hands were in the water all 3 commented on how they could feel the cold was more severe on their non-dominant side.
1. Website: http://www.education.com/science-fair/article/sensitivity-heightened-dominant-side/
Author: Megan Doyle
Title of Article: Is Sensitivity Heightened on Your Dominant Side?
Title of Website: www.education.com
Date Published: Not Displayed on Website
Date Viewed: Tuesday, April 1, 2014
2. Website: http://www.floralvalefamilymedicine.com/Welcome/PatientEducationGuide/tabid/6635/ctl/View/mid/10466/ContentPubID/126/dnnprintmodule/true/Default.aspx?SkinSrc=%5BG%5DSkins/_default/No%20Skin&ContainerSrc=%5BG%5DContainers/_default/No%20Container
Author: The iHealthSpot patient education library was written collaboratively by the iHealthSpot editorial team.
Title of Article: Hand Nerve Injury and Repair
Title of Website: http://www.floralvalefamilymedicine.com/
Date Published: January 15, 2013
Date Viewed: Tuesday, April 1, 2014
This site was used for research on sensitivity of nerves on dominant and non-dominant hands.
Author: Not specified
Title of Article: Why is your dominant hand more sensitive than your non-dominant hand?
Date Published: Not specified
Date Viewed: Tuesday, April 1, 2014
Timed Handedness Sensitivity
Evaluation
If I could I would change the number of times I tested the sensitivity. The more times tested the more accurate the results. For future experiments I would also use hot water because sensitivity doesn't only apply with cold water.
Graph
TIMED HANDEDNESS SENSITIVITY
Hand/Handedness
y-axis
Right/Right |!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|___________________________
Right/Left |!!!!!!
|___________________________x-axis
16.4 16.6 16.8 17 17.2 17.4 17.6 17.8 18 18.2 18.4 18.5 18.6

Left/Right |!!!!!!
|___________________________
Left/Left |!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|___________________________
33.4 33.6 33.8 34 34.2 34.4 34.6 24.8 35 35.2 35.4
*Time (seconds)
Graph
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