Inclusion criteria:  18 < age > 80 years adult person with chronic post-stroke aphasia (> 6 months postonset) receiving SLT rehabilitation 3 times a Week  Exclusion criteria:  presence of apraxia of speech major impairment of comprehension history of other neurological or psychiatric disease  Exclusion criteria:  presence of apraxia of speech presence of major impairment of comprehension presence of history of other neurological or psychiatric disease