Already posted my testing results in this thread.
But I can only go from 10 to around 35 in attribute check at the 2nd Act when I did testing (with characters that were respeced on ship to 10 in all attributes and 0 skills).
As far as testing shows, attribute requirement is only used in border case on specific persuasion level, while it auto-fails or auto-succeeds if it is higher or lower, with no impact from attribute stat.
