A new study involving a colour test showed that people who choose positive colours were nine times more likely to respond than those who chose a negative colour or no colour at all.
These findings could be used to predict responders to treatment.
Peter Whorwell worked with a team of researchers from the University of Manchester UK, to carry out the study using a colour chart called the ''Manchester Colour Wheel', which allows patients to choose colours that have previously been defined as positive, neutral or negative.
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