Working memory tasks in interpreting studies - A meta-analysis

Studies about working memory (WM) and interpreting have used a variety of methods and results are often conflicting. There is therefore the need to analyse the cognitive tasks which have been used so far to assess their effectiveness in detecting WM performance differences. This paper presents the findings of a meta-analysis that compares the results of interpreters and interpreting students (study group) to the results of non-interpreters (control group) in four cognitive tasks (reading span, n-back task, listening span and dual tasks). Interpreters show a significant WM advantage of medium size over non-interpreters in tasks based on verbal stimuli, but not in tasks based on non-verbal stimuli. In addition, differences are larger when there is a wider gap in interpreting expertise between the two groups.