NORTH Melbourne coach Brad Scott says his players understand their roles but he takes full responsibility for the game plan that produced a 104-point loss to St Kilda last weekend.

While Scott is adamant his style will eventually prove successful, he said the fallout of last week's capitulation would go some way towards North redeeming itself against winless West Coast on Saturday.

"It's been a trying week, and as a whole football club we're embarrassed and very disappointed about our performance," Scott said from Arden Street on Friday.

"We're very keen to get out there and rectify it.

"Everyone's aware of what's expected of them. We didn't perform those roles as expected on the weekend, and all the players are very clear on that.

"If the players aren't capable of performing those roles, I take that responsibility."

Scott said the hunger and resolve of his side had been obvious, particularly at Wednesday's main training session where three players including midfielder Andrew Swallow suffered mild concussion.

However, North made three changes to its line-up, with Scott McMahon and Leigh Harding recalled and strong-marking forward Aaron Edwards selected for his first game of the season.

Just as McMahon and Harding were omitted after the round-one loss to Port Adelaide, this week's axe fell on Corey Jones, Matt Campbell and Ben Ross, with only Ross retained as an emergency.

"[The players dropped] are very clear as to why they're not in the side, but also Aaron Edwards has taken 32 marks in the last three weeks at the lower level.

"He's deserved his opportunity."

Much to Scott's frustration, too, was the lack of support given to captain Brent Harvey, who was kept to just five touches by tagger Clint Jones and targeted by a number of other Saints.

"Put it this way, Jones got a lot more support than Brent did," he said.

"We've addressed that and I'll expect a much more committed effort this weekend."

Harvey, who was mourning the recent passing of his grandmother, defended his decision to play and said there were no excuses for his performance or that of the side.

The 31-year-old added that the confidence of his teammates was still high and that nothing extra was needed during the week to keep their spirits up.

There was no reason to question their commitment either.

"Our performance wasn't good enough. We accept that and we went out and everyone's fighting for a spot," he said.

"Brad made it pretty clear that he's not going to put up with a performance like that as a team, and as individuals we have to do something about it. I thought we trained pretty well during the week.

"It's very important that we put that game behind us. Brad and the coaching staff obviously cut all the vision for us, we had a look at that and we learned a lot from it."

Scott said first-round draftee Ben Cunnington, who will continue at VFL level this weekend, was still a little way off making his debut.

Key position prospect Robbie Tarrant and elevated rookie Ben Speight seem closer, given their place on the emergency list.