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 at least one filter associated with said task engine so as to compensate for artifacts that adversely affect said associated reaction input time.