McAuley called on West Brom to bring an end to their five-match winless run in all competitions.
"We've lost a few on the bounce now so we've got to dig deep," he said. "The senior guys in the squad have to get everyone together and get everyone positive because we have a very important game on Saturday.
"I don't know what's changed. Maybe it's just little bits and piece and the rub of the green here and there.
"We've just got to keep believing because we know it will turn around if we keep doing what we're asked to and perform to our best.
"Villa will be desperate for the points but we're desperate for a performance, for a win and for a clean sheet - for anything at the minute - and there's no better place to do it."