1. Go to one of the following sites and take the Ice Cream Personality Test. Note the claims the test makes about the relationships between  ice cream preferences and personality.

      ·         www.personalityquiz.net/foodtests/icecream.htm

·         http://www.icecream.com/funfacts/index.asp?b=104

·         http://www.angelfire.com/ga/sweetgeorgiapeach/icecream.html

·         http://www.panix.com/~clp/humor/tests/ice-cream.html

·         http://www.squidoo.com/icecreampersonality

            2. Ask at least 5 people, the following two questions.

    1. Which of the following five descriptions best describes your personality?

1. impulsive, a risk taker who  lives a hectic life (neurotic)
2. extroverted
3. conscientious
4. agreeable.
5. Introverted

    2. Of the following five ice cream flavors, which one do you prefer?

                            a. vanilla,

                            b. chocolate,

                            c. butter pecan,

                            d.  banana, or

                            e.strawberry

                        .

            To evaluate the validity of the test, use the grid below to see whether self-descriptions relate to ice cream preferences. For example, if someone chose “a” as describing themselves (e.g., they viewed themselves as neurotic and their favorite ice cream flavor was vanilla, you would put a tally mark in the first row of the first column. If, on the other hand, their favorite flavor was chocolate, put a mark in the second row of the first column.                       

 Suppose you had 25 participants and the ice cream test was perfectly valid (all 5 people who described themselves as neurotic preferred vanilla, all 5 extroverted  people preferred chocolate, etc.). In that case, your table would resemble the one below.

Use any of the following chi square calculators to see whether the test has any validity.

http://home.ubalt.edu/ntsbarsh/Business-stat/otherapplets/Catego.htm

http://www.physics.csbsju.edu/cgi-bin/stats/contingency_form.sh?nrow=5&ncolumn=5

http://people.ku.edu/~preacher/chisq/chisq.htm

http://www.opus12.org/Chi-Square_Calculator.html

You attempted to validate the ice cream measure against self-report. Are there other measures you could have used?

To estimate test-retest reliability, re-administer the test to your friends next week. Chart the results in the table below. Then, input the data from that table into one of the chi square calculators listed above.

Is the Ice Cream Test reliable?

Is the Ice Cream Test valid?

Could the Ice Cream Test be valid but not reliable?           Why or why not?

Could the Ice Cream Test be reliable, but not valid?    Why or why not?