Hi

I need some professional advice on a statistics question. I recently took part 
in a survey where the scale of responses was given as:

Agree / Tend to Agree / ? / Tend to Disagree / Disagree

The question mark in the middle seems very ambiguous to me. Can anyone tell me 
if this is a commonly used scale, and if so, what is the question mark supposed 
to mean?

Appreciate any help you can give me


James


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