The Royals went home defeated after Romelu Lukaku struck in the second half to seal victory for the Baggies and currently sit bottom of the Premier League table.
McDermott is adamant that his side must learn to keep possession more efficiently in order to produce positive results.
"The goal that we conceded was really disappointing from our point of view," he told Sky Sports. "To come away and not get anything is really galling but we have to move on now to our next game.
"For us it was more of a nil-nil game, I didn't think we did enough with the ball at times when we had it because I know we're much better with the ball.
|A ROYAL SEND OFF|
|11/4||Reading are 11/4 with PaddyPower to finish bottom of the Premier League this season|
"It's just a case of getting a result. Keep going and doing the right things and not dwelling on what's gone on and going on to the next game.
"We wanted to try and come here and get a result and win the game so I just know that our players are better than we're showing at the moment and we will be better as the games come thick and fast.”