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  About site: http://faculty.washington.edu/chudler/rightl.html

Title: People/Lefthanders - Neuroscience for Kids - Sidedness Educational website about laterality. Includes tests for handedness, footedness, eyedness, and earedness.
Primate_Handedness_and_Brain_Lateralization_Research At Indiana University (M.K. Holder, Ph.D.). You can participate in the study by filling out an online questionnaire. Site also has links to information (both serious and fun) of interest to left-hand

Right_Hand,_Left_Hand Website for Chris McManus' book on handedness. Includes articles and online psychological quizzes.

Scientific_American__Ask_the_Experts__Biology M.K. Holder answers the questions: "Do scientists understand why there are so many more right-handers than left-handers? Do other primates show a similar tendency to favor one hand over the other?"

Sinistrality Facts and myths about lefthandedness, links to lefthander organizations and stores for left-handed products, information on handgun products designed for left-handed use.

Trends_in_Japan__Rise_Up,_Ye_Southpaws Article discusses the increased acceptance of lefthandedness in Japan.

Weems_is_a_Lefty! Personal home page includes personal commentaries about various issues related to left-handedness, as well as links to other sites.


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Neuroscience for Kids - Sidedness Right Side/Left Side In 96% ofthe population, the side of the brain that contains the area important forlanguage is the left side. People havedominant parts of their bodies for other jobs too. For example, about 90%of the population is right-handed. In other words, the right hand isdominant...right-handed people prefer to use their right hand for mosttasks. What about the foot, eye and ear? Which foot is dominant? Whicheye? Which ear?The following set of experiments will help you find out if people have adominant hand, foot, eye and ear. Print out one copy of this table for each person you will test. You willneed to collect several items to test your subject. Also, do not tellyour subjects what you trying to test. You can add more tests in eachcategory (hand, foot, eye, ear) if you want. ----------------------------------------------------------

RightHand/Left Hand

First, let's check people for handedness...which hand do they prefer touse in the following tests? Mark your data sheet depending on whetherthey use their right or left hand.Observe your subject to see if he or she writes with the right or lefthand. Just ask your subject to write his or her name.Which hand does your subject hold a pair of scissors when cutting apiece of paper? Ask your subject to cut a circle out of a piece ofpaper.Which hand does your subject use to throw a ball. Give a ball to yoursubject and ask him or her to throw it to you.Extra Tests (optional)Observe your subject to see if he or she eats with the right or lefthand. You should only count the hand that is used to bring the food toyour subjects mouth...which hand holds the fork or spoon?Observe which hand your subject uses to pick up a cup of water todrink.Materials needed: Pen or pencil and paperPaper and scissorsBallCup with water (optional)Fork or spoon and food (optional)If you want to determine the STRENGTH of handedness, there are two different questionnaires you can use.HANDEDNESS QUESTIONNAIRE #1.HANDEDNESS QUESTIONNAIRE #2.On-line Right/Left Test.----------------------------------------------------------

RightFoot/Left Foot

Now, let's check people for footedness...which foot dothey prefer touse in the following tests? Mark your data sheet depending on whetherthey use the right or left foot.Does your subject kick a ball with his or her right or left foot?Does your subject step up a stair leading with his or her right ofleft foot? Have your subject stand with both feet flat on the ground infront of a step. Ask your subject to step up the first stair. See whichfoot is lifted up. (Note: if you do not have any stairs, you can draw aline on the floor or put a piece of string on the ground. Ask you subjectto step over the line or string. See which foot goes over the line.)Which foot does your subject use to step on things? Put a smallobject, such as a coin, on the floor. Ask your subject to step on the coin. Which foot does your subject use to step on thecoin?Materials needed: BallStairsCoin----------------------------------------------------------

RightEye/Left Eye

Now, let's check people for eyedness...which eye do they prefer touse in the following tests? Mark your data sheet depending on whetherthey use the right or left eye.Which eye is used by your subject to look through a tube? Give yoursubject an empty paper towel tube (or just roll up a piece of paper).Which eye does your subject put up to the tube?Which eye does your subject "sight" with? Ask your subject to look ata distant object across the room (such as a clock on the wall). Tell yoursubject to quickly line up one finger with the distant object so that thisfinger is blocking the object. Now ask your subject to close one eye,then the other. When your subject closes one eye, the object will remainblocked. However, with the other eye, your subject's finger will "jump"out of the way. Mark your data sheet with the eye that stillblocked the object. For example, if the object remained blocked when theright eye was used, mark right eye.Another sight test. Cut a small circle out of the middle of a pieceof notebook paper. The circle should be the size of a small coin. Givethe paper with the hole to your subject. Ask your subject to use botheyes and to look through the hole in the paper at a distant object (like aclock on the wall). Ask your subject to bring the paper closer and closerto his or her face while still looking at the distant object. Which eyedoes the hole in the paper finally reach? The right or left eye?Materials needed: Paper or cardboard tubePaper with small hole----------------------------------------------------------

RightEar/Left Ear

Now, let's check people for earedness...which ear do they prefer to use inthe following tests? Mark your data sheet depending on whether they usethe right or left ear.Which ear do your subjects use to listen to a whisper? Tell yoursubjects that you are going to whisper something very quietly and that youwant them to "cup one ear" to make the sound louder. Speak quietly andsee which ear do they decide to use. Which ear do your subjects use to listen to a sound from a box. Get asmall box and ask your subjects to identify what is inside the box byputting an ear up to the box. Which ear do they use?Which ear do your subjects use to listen through a wall. Ask yoursubjects to try to listen through a wall. Which ear do they use?Materials needed: Small box----------------------------------------------------------

Collect and AnalyzeYour Results

For each subject, determine if all of the responses were on the rightside, left side or mixed. For example, did your subject use his or herright hand for all the handedness tests? If there are more right sided responses than left sided responses, you can call that person righthanded. Do the same for the foot, ear and eye. Is your subject rightor left handed? Right or left footed? Right or left eyed? Right orleft eared?Summarize the data from all of your subjects. How many people in your test were right handed, how many were lefthanded?How many people in your test were right footed, how many were leftfooted?How many people in your test were right eyed, how many were left eyed?How many people in your test were right eared, how many were lefteared?Does whether your subject was a boy or girl make a difference? How manyboys were right handed? How many girls? Compare your data to this table with these numbers from another experiment (reference below). Were your numbers different?% of Men and Women who Use the RIGHT SIDEMenWomenHand8690Foot7786Ear5565Eye7369Table Reference: Stanley Coren, The Left-Hander Syndrome:The Causes and Consequences of Left-Handedness, Free Press, New York,1992, p. 32----------------------------------------------------------

Right - Left Confusion?

Do you confuse your right and your left?Test your right/left identification skill here!----------------------------------------------------------

Right - LeftSwitcharoo

Hereis an activity you can try to see differences in the abilities of your right and left hands. Set aside a period of time (30minutes, 1 hour or longer)and use your non-dominant hand to do things your dominant hand usuallydoes. For example, if you write with your right hand, try writing withyour left hand. If you eat with your right hand, try to hold the fork inyour left hand or try to eat soup with the spoon in your left hand. Canyou brush your teeth with your non-dominant hand? Try it!Caution: BE CAREFUL and USEYOUR BEST JUDGEMENT in the activities youtry. Do not try anything dangerous!----------------------------------------------------------BACK TO:The Senseperiments and ActivitiesBACK TO:Exploring the Nervous SystemTable ofContents[email]SendE-mailFill outsurveyGetNewsletterSearchPages Donate toNeuroscience for Kids
 

Educational

website

about

laterality.

Includes

tests

for

handedness,

footedness,

eyedness,

and

earedness.

http://faculty.washington.edu/chudler/rightl.html

Neuroscience for Kids - Sidedness 2008 December

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Educational website about laterality. Includes tests for handedness, footedness, eyedness, and earedness.

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