Experts from Matrix said helping those who had communication difficulties find work could save the government and the NHS in the long-term, as well as boosting individuals' prospects.
Kim Hartley, from the Scotland office of the Royal College of Speech and Language Therapy, said: "The Scottish budget needs to save 500 million next year. This study proves that speech and language therapy can help meet that challenge."
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Hide AdThe survey was timed to coincide with the organisation's Giving Voice campaign, which aims to raise awareness of the therapy to help people with a range of communication problems.