Most of Dialogue by Design’s work is qualitative but recently we have been using a quantitative approach with representative samples of a population. This has helped us to clarify why we usually advocate a qualitative approach and the particular situations in which quantitative methods are better.
The established arguments are that:
Despite these drawbacks, qualitative methods have some key advantages over quantitative analysis:
The last point is crucial. Closed questions can obscure or disguise underlying assumptions that only become clear when participants complain that they are being coerced into saying things that they do not intend. This is a particular problem when the facts surrounding an issue are not widely accepted, for example the pros and cons of incineration technology or the safety of the MMR vaccination.
Secondly, quantitative methods often raise the expectation that the results will be interpreted as a binding vote and participants are regularly disappointed when their views do not determine the eventual decision.
Quantitative methods do have their place, for example, when the results from a sample must be representative of a population as a whole or when budget is limited, and we use them whenever they offer the best solution. But in most cases involving consultation or public engagement, qualitative methods provide a much better foundation for informed decision-making.
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