AUTHOR=Yon Daniel , Press Clare TITLE=Back to the future: synaesthesia could be due to associative learning JOURNAL=Frontiers in Psychology VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2014.00702 DOI=10.3389/fpsyg.2014.00702 ISSN=1664-1078