Scotland's head of referee development says players must do more to avoid picking up so many cautions, reports BBC Sport.
"I think the players could do a lot more to help themselves," Hugh Dallas told BBC Scotland.
"There have been no orders for referees to issue more cards, and we're happy with the level of decision-making."
In the 30 Scottish Premier League fixtures so far this season officials have given 131 yellow cards, compared to 110 at the same stage of last season.
The tally is high when compared to numbers for the English Premier League - 183 yellows from 112 matches.