BOSTON, MA--(Marketwire - November 11, 2008) - PHT Corporation, the market-leading provider of electronic patient reported outcome (ePRO) solutions used in more than 360 clinical trials worldwide, is providing its innovative LogPad® System to help headache experts at Clinvest Clinical Research measure cognitive deficits during migraine attacks in a sponsored clinical trial. This is the first time cognitive processing time has been tested in a major migraine research study.