Phase 3 Prep




- Try to use interval variables, where you can. (Remember that you should not recode, when it is not necessary.)

- For this assignment, you will just be showing the instructor how you will be recoding. (You will be recoding later. When you recode, make sure to save the dataset. Otherwise, you will lose all the recoded varaibles.)



Deciding Whether or Not Recoding is Necessary

* All four variables are interval.

        Do not recode.

* The dependent variable is an interval variable, and an independent variable is a nominal or ordinal variable.

        Recode the independent variable and create two categories.

        Report how you will recode the variable. See the example below.

* The dependent variable is nominal or ordinal.

        If there are too many categories in any of the variables, recode them into two to four categories.

* Report how you will recode the variable.† Make sure to include the information on the original variable and recoded variable. See the examples below.


1. Write your hypotheses.

Main Hypothesis:

Alternative (Rival) 1:

Alternative (Rival) 2:


2. Describe how you are operationalizing your concepts. Describe your dependent variable, Y, by following the table below. The variable names, labels, and descriptions of categories are found in the SPSS datasets.

††††††††† a) Check "Variable View" and find the dependent variable "Y" that you have already chosen. Find the column "Name" and type the name of the varaible exactly in the same way. Similarly, find the "Label" and "Value" columns and type the label and the codes of the variable. Do not create your own name and label. However, if you are recoding, you will be creating your own name and label for the new recoded variable that you are creating. See the second table below to report your recoding plan.        


            Example 1:†††††

†††† ††††

Variable name


Variable label

Should marijuana be made legal?

Description of categories

1) Legal 2) Not leagal 0) 88) 89) Missing

*Note: For GSS, NES, and WVS, the description should include response categories. *If there are no categories, type "None."

*Make sure to report missing values (i,e, 0, 88, 89)


Variable type


Level of measurement


Used to test

Main, Rival 1, and Rival 2


3. Create another table and repeat the above for the main independent variable, X1


††††††††† Example 2


Variable name

Age {Recoded variable: Age2}

Variable label

Respondentsí age {Recoded variable: Age recoded}

Description of categories

98) and 99) missing

{Recoded variable 1) 18-39 2) 40-59 3) 60-89}

Variable type


Level of measurement

Interval/ratio {Recoded variable: Ordinal}

Used to test

Main hypothesis


3. Repeat the above for the second independent variable (rival 1)


4. Repeat the above for the third independent variable (rival 2)



You should have four variables (Y, X1, X2, and X3).

Remember that you can only use a single dataset.


If you make any mistakes, the instructor will let you know how to improve your assignment. You can redo your assignment and show the instructor the improved version. Repeat the process until everything is correctly done. Save your file and deposit the final version to Blackboard. Visit  and go to POLS210. Find the assignment and double click and upload your file as a WORD file. You will receive 100%. Blackboard allows you to deposit only once. If you did not complete the assignment during the lab hours, you must deposit your assignment to Blackboard by 5pm next day. The instructor will grade your assignment. (You will not be able to redo the assignment, even though your score is lower than 100%.)