City Services Satisfaction Survey 2013 City Services Satisfaction Survey | Page 86

Additional Key Measure Trend Data
Caution On Year-To-Year Comparisons
With the change from telephone to Internet methodology in FY 2012, it was recognized
that there might be differences in year-to-year comparisons that could not be explained
by anything other than that change.
Some of the factors that might result in differences include: different sample;
respondents looking at or reading questions rather than listening; self-
administered questions vs. interaction with an interviewer; the type of person
willing to participate in an Internet survey vs. someone willing to participate in a
phone survey; and many other possible factors, including unknown factors.
Especially for the first year (FY 2012), comparability with previous waves may be lost to
some extent. Unexplained differences were in fact seen in a number of year-to-year
comparisons. They have generally been presented here for informational purposes,
without attempted explanation. For all these reasons, year-to-year comparisons should
be interpreted with caution.
Decision Analyst, Inc.
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