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Archived from the original on June 27, Originally developed in the personal-selling literature, the hierarchy-of-effects model has undergone various modifications in its historical development such that today we use it in the plural form, indicating that competing models exist. With one version for adults and another for children, this app will interactively help you set up your exposure hierarchy, set practice goals and rewards, provide you with tools to help you fight your OCD symptoms at any moment, and much more. Like the perfect finish to a meal, it shouldn't be skipped. Hot Young Selfpic 2. Retrieved October 5, Click Here to Purchase Album.