We have a dispute over the effect of the King in Yellow item.
Once per round, after you suffer one or more horror, you may research one clue (place it on the scenario sheet).
I believe that the card allows you to take an extra action to Research when you suffer horror, rolling her Observation as normal, following rules 402.3 for extra actions and the text in parenthesis is just reminder text that tells you what happens on a successful roll.
Another player believes that the clue is automatcally placed on the scenario sheet without a roll, following rule 470.
What is the intention of this card?