What are some of the ways you assess the needs of the visualy impared?
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These websites should help you.  Many states and provinces would have similar documents, but these are the ones I am familiar with.
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focusing on certain tasks
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examination\ntestament
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Take a professional to look at it
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what are u looking at what applications u require
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Requirements\nDesign\nImplementation\nTest\nDeploy\nMaintenance
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Since you don't really give us enough information, how about the following:\n\nYour goals and objectives for 2006\nProgress toward those goals to date, with accomplishments you can sustantiate and measure.\nObstacles and challenges\nWhere you go from here.
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It depends on what type of material you were looking at.  A journal?  An e-book?  Information on a website?
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just enough to get by with what you have\n\n"enough to meet the needs of a situation"
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Bouyancy. Look it up.
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Which ones do you need?
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Consult an architect.
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There are many different kids of needs. I am guessing you are a psychology student. You should have asked from which theorist. Anyway, Maslow for example has two types of needs: growth needs and deficiency needs. At the bottom are deficiency needs including physiological needs (food, drinks), safety needs (security, psychological safety), belongingness and love needs (affiliation, acceptance, affection), esteem needs (approval and recognition). Then we get into the three growth needs: cognitive needs (knowledge, understanding), aesthetic needs (beauty, symmetry), and finally self-actualization. In order for the latter needs to be achieved, the ones prior must be met. It works like a "need hierarchy". Although this might not be what you are looking for, it's a start
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Doing a survey, depends what type of product, then you compile a questionnaire regarding the area you need to look at and ask the consumer what is missing, what improvements need to be made etc!
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Be polite!\nListen to their needs!\nGive rewards!
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help, him or her over the need ,\nbye positive feed back \nand lots of  care .
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how are we supose to know