Reliability and operational validity A planner wants to assess road quality He sends a questionnaire

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Reliability and operational validity A planner wants to assess road quality He sends a

questionnaire to a sample of residents and asks them to evaluate road surfaces,

repair quality, and amount of traffic He finds the results of limited value,

so he assigns engineers to travel through the neighborhoods to rate the roads

The engineers are given general instructions but no written rating forms Still

dissatisfied, he develops a rating form that lists the number of potholes per

mile, the depth of potholes, the thickness of asphalt, the width of the roadway

and similar measures

(a) Comment on the reliability and operational validity of
each approach

(b) Which approach would you consider the most operationally
valid? Comment on the ways each approach could be modified to improve its
reliability and validity

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