Dual n-back training increases the capacity of the focus of attention
Psychonomic Bulletin & Review (2013) - Comment
pubmed: 23184506  doi: 10.3758/s13423-012-0335-6  issn: 1531-5320  issn: 1069-9384 

Lindsey Lilienthal, Elaine Tamez, Jill Talley Shelton, Joel Myerson, Sandra Hale