The flanker said a strong emphasis has been put on collective self-analysis by his players since the confidence-shaking defeat at the Millennium Stadium.
It is eight years since Wales were last toppled by the Scots, but they will head to Edinburgh with their confidence severely dented. Wales failed to score a point in the second half as England impressively wiped out a 16-8 interval deficit.
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“We need to try to play a bit more rugby,” Warburton said. “Teams are starting to play a little bit less rugby against us and it’s how we can adapt to that.
“It’s always an arm-wrestle for quite a long time against Scotland and, looking at them now, their line speed is excellent in defence and it will be another big challenge for us.
“We need to get back to winning ways and it is must-win because if we want to win the championship we are going to have to win all four of our remaining games. One step at a time, but we have to win on Sunday.
“We had a forwards’ meeting this week that was scheduled to be five to ten minutes, but it went on quite a bit longer than that. There was a lot said and it was a productive morning. We didn’t do a lot of training but the amount of talking that we did will help us moving forward.”