Before scientists begin a research project, they must plan each step of the experiment; that is, they must create the study design. Think of a study design as a map for the scientist to follow. The study design is important, because if the design is poor, the results will be difficult to interpret. Most studies described on this site are designed to test the effect of a given therapy on a population of children with autism. Ideally, the scientists must state the effect that they are looking for prior to beginning the study. The study then measures whether or not this beneficial effect happens, and whether or not there are any unintended harmful effects of the therapy. Most scientists believe that studies with large numbers of subjects (greater than 100) are more reliable than studies with smaller number of subjects. Other important aspects of study design are whether or not the study includes a placebo or other control and whether the study is blinded. For more information on controls, see the FAQ on controls.
Tags: autism | design | research | science
