Once children are talking, their speech may be difficult to understand. We expect unfamiliar people to understand the speech of: two year olds 50% of the time; three year olds 75% of the time; & four year olds all the time! Pronunciation errors can significantly interfere with getting a message across, and as children approach school-age this also becomes an issue in learning to read and write, which depend on strong skills in recognizing and using sounds. Careful diagnosis of speech problems is needed to prescribe the appropriate, research-based approach to therapy. North-East Speech Pathology uses the most up-to-date research on assessment and intervention to ensure therapy is scientifically targeted and powerful.