Stale Solbakken insists Wolves need to rediscover their self-belief ahead of Tuesday night's home clash against Millwall.
Wanderers took an early lead against Nottingham Forest at Molineux on Saturday only to see the visitors turn matters around to triumph 2-1 thanks to former midfielder Adlene Guedioura's winner.
It extended Wolves' winless run to eight games, with four defeats in their last five games, a sequence of results which has seen them slip from third place in the Championship to 17th.
Solbakken said: "After conceding the second goal (against Forest) we looked like a team who had not won for a while.
"You could see that in the way that we passed the ball. Safe balls went wrong and many players made the wrong decision.
"That is often down to a lack of self-belief and that has to go before we play Millwall on Tuesday. We have not lacked it before but you could see it after we went 2-1 down. We have to work on that because if you are afraid of something you will never turn the corner."