Singing Christmas Tree bass and heavier singers at the bottom of the tree. In reality, they are arranged in six sections. They are broken down with two sections of sopranos, two sections of altos, a section of tenors, and a section of bass. Singers who require sitting in a chair or a stool during the performance are located in the bottom two rows of the tree. Choir members who are acrophobic (fear of heights) are located near the bottom of the tree while claustrophobic (fear of restriction or suffocation) choir members are located at the outside of the tree. Most choir members stand
Appeal to fear are often used in marketing and social policy, as a method of persuasion. Fear is an effective tool to change attitudes, which are moderated by the motivation and ability to process the fear message. Examples of fear appeal include reference to social exclusion, and getting laid-off from one's job, getting cancer from smoking or involvement in car accidents and driving. Fear appeals are "nonmonotonic", meaning that the level of persuasion does not increase in proportion to the amount of fear that is used. A study of public service messages on AIDS found that if the messages were too aggressive or