A new research report claims that tDCS improves performance on associative learning tasks.
tDCS is a technique in which an electrical current is applied to a person's muscles, generally via the neck or head. This report lends support to preliminary findings, which indicated that these currents could affect neural activity.
This research is reminiscient of DARPA's Targeted Neuroplasticity Training (TNT) program. Their goal is to use a non-invasive device (i.e. tDCS) to improve skill learning.