Situation:
I'm running a 3.5 D&D game, my characters are 14th and 15th level.
In a battle last session a character (ftr/clr) took a good amount of damage and told me he wanted to go down as if he were incapacitated.
I told him to roll me perform (acting) and he asked if he could roll bluff, to which I told him, "no. roll perform"
What perform type did you make him roll? Act? There is no such thing a s general perform.
What DC did you use?
Perform is not an opposed check skill, unlike Bluff. So technically you can't do a Sense Motive to determine if he is "faking".
Like Craft, Knowledge, and Profession, Perform is actually a number of separate skills.
You could have several Perform skills, each with its own ranks, each purchased as a separate skill.
Each of the nine categories of the Perform skill includes a variety of methods, instruments, or techniques, a small list of which is provided for each category below.
• Act (comedy, drama, mime)
• Comedy (buffoonery, limericks, joke-telling)
• Dance (ballet, waltz, jig)
• Keyboard instruments (harpsichord, piano, pipe organ)
• Oratory (epic, ode, storytelling)
• Percussion instruments (bells, chimes, drums, gong)
• String instruments (fiddle, harp, lute, mandolin)
• Wind instruments (flute, pan pipes, recorder, shawm, trumpet)
• Sing (ballad, chant, melody)
Now personally I would have used Bluff and given a bonus due to synergy if he had 5 or more ranks in Perform (acting)