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Study guide

Up to date as of January 14, 2010

From Wikiversity

When analysing data, you may come across instances where more than one response or measurement is possible for an single survey question.

For example,

  1. "Tick all responses that apply." (multiple dichotomies)
  2. "List up to three reasons you do physical exercise." (multiple responses)

Rather than treat each responses as separate variables, multiple responses should be analysed together using multiple response analysis.

For example, SPSS has a feature called Multiple Response Sets that allows you to analyse questions with more than one response.

The three general steps are:

  1. Define a set of two more responses (you cannot do step 2 without doing this step first)
    1. Analyze - Multiple Response - Define Sets
      1. Add the multiple response variables to the "Variables in Set" box. Then click
        1. Dichotomy (if there were only two categories of response) or
        2. Categories (if there were several categories of response) and indicate the category range
      2. Add a name for this new set - Label is optional
      3. Click Add to create the set and then close
  2. Obtain multiple response frequencies (or cross-tabs) of the set you created - this will provide frequencies and percentages of each response option by total number of responses and by cases
    1. Analyze - Multiple Response - Choose either of:
      1. Frequencies: Add the multiple response set into the tables box and click OK
      2. Crosstabs:
        1. Add the multiple response set into either the columns or rows
        2. Add an independent variables of interest (e.g., gender) into the columns or rows (the opposite of the one for the set)
        3. Options - The results will show frequencies, but you can also get percentages click options to also get cell percentages based on columns or rows for cases and responses
  3. Create a graph: It can be useful to graph frequencies or percentages (bar graph). You will need to decide whether to graph responses or cases (or do both). Options for graphing this data:
    1. Use a word processor or spreadsheet - e.g., see Making a Microsoft Word Graph or Graphing with Excel
    2. If graphing responses, you could use SPSS to make a new data file and copy all the responses into a single column (variables), also copy the value labels, then Graphs - Bar Chart

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