Table 2. In your lab notebook, make a data table like this one to summarize your results in. For each volunteer, write whether they mostly used their "Right" or "Left" sides to do the different dominance tests.
6. Calculate the percentage of people who were left or right dominant for using their hands, feet, eyes, and ears. Write these answers in the "Percent Right" and "Percent Left" columns in the data table in your lab notebook.
a. For example, to calculate what percentage of people were right hand dominant, add up the total number of people who mostly used their right hand instead of their left hand, and divide this number by the total number of people you tested.
1. For example, if eight out of your ten volunteers mostly used their right hand, then 80 percent of your volunteers were right hand dominant, or right-handed.
2. You would write this answer in your data table in the "Percent Right" column in the "Hand Dominance" row.
b. Do this calculation for hand, foot, eye, and ear dominance, for both the percentage that were right dominant and the percentage that were left dominant.
7. Now take a look at your summary data table and ask yourself some questions:
a. Are more of your volunteers right-handed or left-handed?
1. What about right-footed versus left-footed, right-eyed versus left-eyed, and right-eared versus left-eared?
b. What side is the most common and has the highest percentage in your subjects?
c. Now ask yourself how many people that are right-handed are also right-footed (and vice versa).
1. You can calculate a percentage of this by counting the number of people who are both right-handed and right-footed, and dividing by the total number of people who are right-handed. Is the percentage high or low?
2. You can do a similar calculation for any of the other possible combinations. Do you see a correlation?
8. Using the data in the "Percent Right" and "Percent Left" columns of your summary data table, you can make two bar graphs, one graph showing the percentage of people who were right-sided and one graph showing the percentage of people who were left-sided.
a. You can make graphs by hand or use a website like Create a Graph to make a graph on the computer and print.
b. On the left side of each graph (the y-axis), write a scale for the percentage of people from zero to 100%. On the bottom of the graph (the x-axis), write the dominance test categories (i.e., "Hand Dominance," "Foot Dominance," "Eye Dominance," and "Ear Dominance"). Make a bar for each of the four categories.