Consider your economic circumstances. In-person courses can be a week long, and, unless one happens to be given in your town, they require travel expenses, meals, hotel, etc. If you are in private practice, you also give up your income for the week. If you live very far away from the course, and have an exchange rate problem, language barriers, etc., then a distance course would be recommended. Another point is that many distance education courses can be divided into segments, so you may only need to purchase and take the parts you need.
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*This article is based on one I wrote for AAPB's web site.
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