Ahead of the Barclays Premier League clash at Everton, the Potters have lost five successive top-flight away fixtures and managed only one win in their last 24, a sequence stretching back to January 2012.
Those statistics are in stark contrast to their record at home, where they have been beaten just twice in 22 league matches.
Pulis insists his side - currently 11th in the table - have generally performed well on the road this term and that they have frequently not been rewarded with the results they deserve.
He does, however, believe they need to do better in ensuring they maintain their focus for the entire duration of away contests.
Pulis said: "From the first game of the season, where we played at Reading (a 1-1 draw) and they scored a late penalty, to the last away game at Newcastle (a 2-1 defeat), where we should have been home and hosed (but conceded two goals towards the end), we have managed to shoot ourselves in the foot.
"We have done that continuously. Every time away from home, it is about concentration levels as much as anything.
"In the Premier League, if you switch off for two minutes or do something silly, nine times out of 10, you get caught.
"So concentration levels are vital, although it is also important they enjoy themselves - make sure they go out there and express themselves, and work really hard."