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Potential Problems in Surveys

Potential Problems in Surveys: If you can, you should watch for a number of potential problems that might arise in a survey:

• The definition of the sampling method, if not mentioned, can be a cause for suspicion.

• Often people sampled cannot or will not participate in the survey. The more people have refused, the more suspect the results.

• Often the survey taker will arbitrarily determine who is to be sampled and what is to be learned about the sample.

• The nature and order of questions can bias a sample, so have a look at the actual survey questions and their order.

• If a survey is undertaken over weeks or months, views can change, creating an inconsistent sample.

• If methods of data collection change (e.g., telephone vs. personal interview), results could be inconsistent.

• A common error in many surveys is that findings are extrapolated from a sample rather than obtained directly from the entire population.

• Often the overall sample may be large enough to be significant, but stratified sub-samples will be insignificant.

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