In focus groups that I have done I used ISO glasses filled to a known quantity.; sometimes two wines sometimes more. Therefore I  controlled the maximum the participants could drink - for safety reasons.  However I don't measure what they actually drink or spit. That's not my question either.

Thank you, Caroline.  I appreciate your response and it is noted.  I will hope to create a proposal poster soon.  I like the idea of consistency, a great control.

Byron

Hi Bryon, 

I have been part of the tasting group for wine.  Generally it is a fixed quantity of the wine and the size of the wine goblets would be the same throughout.

One thing more to add here is that in a tasting it is the same type of wine that is tasted, so if its white all sample would be white (rose or red then the same throughout).

The amount poured is basically the least quantity. Not a measure of 60 -90 ml. probably, 15 - 30 ml would be fine, as it helps in swirling the contents better than a full measure (which helps in gathering the aroma better), also little amount is required to roll it around the tongue to get the taste and consistency.

I hope it helps.

Chetan

Thank you, Chetan.  Great suggestions, on the constancy and quantity.  We are investigating with sparkling wine at this point and its great to hear others are as well. Byron