By Neil Frude (auth.)
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Extra info for A Guide to SPSS/PC+
To preserve the full information from respondents' answers we should treat question (f) as containing eight Collecting and Coding Data 21 separate items, and hence code the answers in terms of eight separate variables. Thus the variable hockey might be coded 0 if there was no tick present, and 1 if a tick had been given (and so for the other seven games). e. the number of variables, among the eight, which were coded with a 1 -meaning 'game engaged in'). If we had opted to include all of the information from the question in terms of a single variable, however, and merely counted the ticks, there is no way in which we could later unscramble the resulting number (0 to 8) to determine how many respondents had engaged in, say, hockey.
But, once the rule has been established, the sex of all subjects must be coded according to the same rule. Another example of numerical coding is provided by the case where we ask respondents how much they agree or disagree with a statement using a fixed range of levels of agreement. ' Respondents could be asked to indicate how much they agree or disagree with this statement by ticking one of five responses: ... ... ... Strongly agree Agree Neither agree nor disagree Disagree Strongly disagree For analysis, the answer each respondent gives to this question could be coded numerically (for example, using 1 to indicate 'Strongly agree', 2 to indicate 'Agree', 3 to indicate 'Neither agree nor disagree', 4 to indicate 'Disagree' and 5 to indicate 'Strongly disagree').
The files normally produced by word-processors contain information other than that expected by SPSS/PC+, although some word-processing programs do allow the user to save a file in ASCII form. One way to find out whether a file is in ASCII form is to try to display it on the screen using the DOS 'type command', using the format: C>type myfile