AUTHOR=Thompson G. Brian TITLE=Unrecognized ambiguities in validity of intervention research: an example on explicit phonics and text-centered teaching JOURNAL=Frontiers in Psychology VOLUME=5 YEAR=2015 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2014.01535 DOI=10.3389/fpsyg.2014.01535 ISSN=1664-1078