Guided practice on standard tasks targeting memory, information processing speed or visuospatial ability are offered in individual or group sessions or alternatively in computerized form (digital tablets). Tasks of variable difficulty are available, so that they correspond to the individual’s capabilities, deficits and needs. Cognitive training may include learning of memory strategies (mnemonics). People with pre-dementia cognitive disorders seem to benefit more, but still moderately, from cognitive training in comparison to individuals suffering from dementia with regard to global cognition, attention and memory. The absence of demonstrable significant benefits may be attributed to methological issues that have hampered research efforts to consider all potential gains that may be produced by cognitive training.