Robson trials former Murray coach Maclagan
The British No. 1 has been without a coach since dismissing Croatia's Zeljko Krajan in May after just nine months together, having crashed out in the first round at six tournaments in 2013.
Robson stunned world No. 3 Agnieszka Radwanska at the Madrid Masters following the split, but was left bitterly disappointed after her first-round exit at the French Open at the hands of Caroline Wozniacki.
She will start working with former British Davis Cup player Maclagan at the AEGON Classic in Birmingham, which begins next week.
"We're going to start out for a little period over the grass to see how things go," Maclagan told BBC Sport. "It's a new challenge and that's why we have a trial period, to see what happens."
Maclagan began working with Murray in 2007, guiding the then-world No. 11 to his first two grand slam finals and as high as No. 2 in the world rankings before the pair parted ways in 2010.
Working with world No. 37 Robson represents a shift in focus for the 38-year-old, who has not formally coached a WTA player before.
But while Robson's form has been erratic in 2013, victories over the likes of Radwanska, Venus Williams and former Wimbledon champion Petra Kvitova suggest she has the potential to reach the top of the women's game.
"That is the big attraction of it," Maclagan said. "She clearly has the mind for the big stadiums, for the big time, to take on the big players. It's a key ingredient in anyone who's going to play well.
"There's a lot I need to learn about the women's tour and, to be honest, Laura's not someone I've really studied. I've watched her just in passing rather than studied her, so there's a lot about her game that I need to know.
"But just to see those things - a young player with a lot of firepower and the ability to take on the top players - is exciting. She's beaten top players so her sights should be high.
"She's at a pretty good ranking at a young age, and with the firepower she does have the ability to do some damage.
"But to start saying you should win slams, I don't think anybody has a right to win them. There's a lot of work to do."