Implicit learning will be assessed in the trained hand (dominant) (see above) and in the un-trained hand. The un-trained hand will be tested by asking subjects to repeat two random blocks (familiarization) and two sequence blocks. One of these sequence blocks is a repetition of the same sequence that they learned with the dominant hand. The other sequence block is a new sequence containing the same number of characters as the previous sequence. Implicit learning on the un-trained hand will be assessed by the difference in RTs, between random block and the sequence block. In addition, implicit learning on the un-trained hand will be evaluated by testing the difference between the two sequence blocks repeated by the un-trained hand. The time at which explicit learning occurs will be assessed by verbal report and the degree of explicit learning by the number of correct items when repeating the sequence.