Barnes decided to play his second-leading scorer, Sheldon McClellan, just 7 minutes. He did not score.
"We know our guys. We know when they're engaged, we know when they're focused and that's what we base it on," Barnes said. "I think those guys will tell you if they're doing what we want them to do, they can make mistakes. We don't expect them to be perfect. What we want: We want guys engaged.
"We're around these guys every day of the year almost. We know when they're focused, like Myck had a tough day today and he fought it. He was trying to do it, maybe do too much."
The Longhorns tried to deploy their full-court press, but couldn't duplicate their comeback from a 22-point deficit in the final 8 minutes of regulation in an overtime win against Oklahoma on Wednesday night.
Oklahoma State was able to handle the pressure without much trouble, using it to create easy scoring chances.
Phil Forte grabbed a press-breaking outlet pass and hit an open 3-pointer from the left wing, and Brown converted a three-point play on the Cowboys' next possession after getting a high-arcing runner to go over the corner of the backboard and fall in. His ensuing free throw stretched the lead to 65-46 with 7:31 remaining.
"Everybody wants to know why you don't press all the time. Well, certain teams obviously handle pressure more than other teams," Barnes said. "We don't want to have to get behind and scramble all the time."
The Cowboys also returned the favor with their own trapping pressure in the half court, and both teams wound up with 18 turnovers.
"We love doing pressure, especially when we go to four guards with me at the four position," Nash said. "We love pressing guys. I think we're the most athletic team in the Big 12, so we have to show it sometimes by pressing.
"We love to turn people over and convert it into easy baskets. When you're doing that, it just makes your job more easy on offense."
Forte ended up with 14 points as Oklahoma State swept the regular-season series against Texas for the first time since 2004. The Cowboys had lost 11 of 12 to the Longhorns before winning three straight.