input: [Category] Experimental Design (10 pts) [Average] The design is appropriate to the question or problem, but may fail to identify an important variable or to account for all important aspects of standard conditions. Or, it may lack enough comparisons or tests to obtain data that have a clear meaning. [Weak] There may be some evidence of an experimental design, but it may be inappropriate or not used well. The design may fail to account for an important variable or a major aspect of standard conditions. Another experimenter would have difficulty repeating the experiment. [Excellent] 
output: The experimental design is appropriate to the problem; it is efficient, workable, and repeatable. If appropriate to the design, important variables are identified and contrasted to the standard conditions. The design allows for a sufficient number of comparisons of variables and of tests to provide meaningful data.