IBG
Wally is quite right-turbulence is a very subjective subject. Based on Makeithappencaptain's excellent definitions I slow down in moderate chop and the less moderate it is the more I slow. "Loose objects moving about " would be an easy way to judge that it's time to slow down. Perhaps you could place your mob phone on the glareshield and rename it your "Oh F*#k-o-meter" When the meter goes up you slow down.
Safe Flying RA
As the young pilots apple cheeked old grandmother used to say " I want you to be real safe so you fly real low and real slow"