Recoding Variables in IBM SPSS

Recoding Variables in IBM SPSS

Sometimes it is necessary to recode into the same variable name. Usually, it is best to be sure the old values can be recovered in some way if necessary. In some situations, the recoding can be reversed (the new values can be recoded back into the old values if the analyst simply keeps a record of the relationship between the old and new values). In other situations, reversing the recode is impossible, even if the analyst knows the relationship between the old and new values.

Describe what causes the latter situation, and give an example of a recode where it would be impossible to recover the old values even if the researchers remembers the relationship between the old and new values.

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