The euphoric kavas will tend to sway towards the "mind" portion of the slider, whereas sedative kavas will lean towards "body". These results are an aggregate of every review submitted to kavaforums. Whenever you submit a review for kava here it will impact the score that kava receives in the product display.
For example, say you wanted to see where the reviews for Borongoru from Kalm with Kava were.
You would go view the product review page here:
http://kavaforums.com/forum/forums/kalm-with-kava-product-profiles.185/
You can see each kava, and the number of reviews it took to make the grade