1. A system for filtering results from tests that include reaction time as part of the test results, comprising: an input device that receives respondent input in response to queries; a task engine associated with said input device, said task engine presenting said queries and receiving respondent's input to queries and associating a reaction input time for each said respondent's input; a results database for receiving said respondent's input and said associated reaction input time; and a length of words filter associated with said task engine so as to compensate for artifacts that adversely affect said associated reaction input time, wherein prior to presenting queries to said respondent, said task engine presents statements of different word length to said respondent who confirms reading each statement so as to generate a filter time, and said task engine associates said filter time with said respondent's reaction input time in said results database.