Final answer:
Hypnosis can help clients be more receptive to expert advice offered by a trainer.
Step-by-step explanation:
The technique that can help clients be more receptive to expert advice offered by a trainer is hypnosis. Hypnosis is most effective in individuals that are very open to the power of suggestion. It requires commitment on their part to change their thinking and behaviors, and therefore is likely to work better for some individuals and biases than others.