Acknowledgements
I thank Nate Kornell and Stephen Peverly, as well as my co-editor on this special issue, André Vandierendonck, for comments and suggestions on earlier drafts of this introduction. I am also grateful to the Spencer Foundation, who inspired the organisation of this special issue, and to Barnard College, who hosted and funded a special conference called Metacognition: Theory and Application, after which the idea for the special issue evolved. In the writing of this article, the following websites were consulted: http://www.bls.org/cfml/l3tmpl_history.cfm; and http://www.infed.org/thinkers/et-froeb.htm