Over the last year, VincentYu, gwern and others have provided many papers for the LessWrong community (87% success rate in 2012) through previous help desk threads. We originally intended to provide editing, research and general troubleshooting help, but article downloads are by far the most requested service.
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ILL couldn't get Schretlen et al. Can try again once the paper is included in the print journal, but I'd recommend just asking the authors for a copy.
The PDF/journal copy seems to be up now: http://clinicalschizophrenia.org/doi/abs/10.3371/CSRP.SCST.103114?journalCode=csrp (PDF). Can't get to it through Sci-hub, but maybe your university access can get it now?