What's easier: doing what you want, or being told what to do? Cued versus voluntary language and task switching
Journal of Experimental Psychology General (2014) - Comment
pubmed: 25313951  doi: 10.1037/a0038006  issn: 1939-2222  issn: 0096-3445 

Tamar H. Gollan, Daniel Kleinman, Christina E. Wierenga