?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Pepper&rft.au=Pepper%2C+D&rft.aufirst=D&rft.date=2018&rft.issue=1&rft.atitle=Think+aloud%3A+using+cognitive+interviewing+to+validate+the+PISA+assessment+of+student+self-efficacy+in+mathematics&rft.volume=41&rft.title=International+Journal+of+Research+and+Method+in+Education&rft.pages=3-16&rft.genre=article