1. Let’s use those three measures together to get a more
thorough measure of that concept. This process is called scale construction.
1. First, tabulate all three measures. There are two ways we
can compute a scale. One method is to add up all the indicators; the other is
to take their average. In this case, we will take the average. This is because
we can take an average score even when someone missed a question—we cannot add
them up unless respondents answered all three items.
1. Select transform->compute
2. Enter the following into the “numeric expression” field
and then press OK: MEAN.2(V7329, V7330_r, V7333). This syntax can be read as
“take the average of these three variables if at least two of the three items
have been completed.”
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