The England international joined the Baggies on loan at the beginning of the season but has suffered a succession of injury problems during his time at The Hawthorns which has restricted him to making just 12 appearances this term.
"Chris has shown an unbelievable attitude," said Robson.
"He's come in and been mixing with the lads.
"He's been training with us even though he can't do any goalkeeping because of his broken finger.
"He's shown real commitment, so that will be a position we'll be looking at to see if we can take it any further forward."