Okay, I slapped one together and tested it:
#,mirrdance,Mirror Dance,“Your description here”,0,default,0,0,0,-1,-1,1,1,1,1,1,1,1,#,“confidence,0.0,0.1”,“fitness,0.0,0.1”,“loneliness,0.0,0.1”,#
I’ve zeroed out the effect percentages here (the first number after the effect name). If you replace the 0.0 with 0.5 for confidence, confidence will rise 50 points. Set it to -0.5 and confidence drops 50 points.
The second number tells Kudos how quickly you want the effect to wear off… the values I set above make the effects wear down by the next turn. If you set that number to something like 5 you get an effect that never seems to wear off.
An important note: make sure you put a # mark at the end of your new activity, or the game will crash.
Hope that helps.