Research findings relating to the use of Cogmed Working Memory Training can be found by visiting the official Cogmed site at:
Briefly, findings suggest that around 80% of users benefit from an increase of about 20% or more in Working Memory capacity. Benefits of training vary from individual to individual and successful training depends on a variety of factors.
The following items may be of interest if you wish to find out more about the research supporting Working Memory training.
Relationship between fluctuating hearing loss and classroom difficulties
Anderson and Matkin, 1991
Individuals identified as having poor working memory are at risk of poor educational progress
Gathercole and Alloway, 2008
Working Memory can be improved through cognitive training
Klingberg, et al, 2005
Working memory can be improved and improvements sustained over time
Holmes, Gathercole and Dunning, 2009