An articulatory suppression
task was also added in order to avoid the vocal repetition of presented shapes; the "1, 2, 3" and "2, 3, 4" numerical sequences were used for this task.
Pappagno, Valentine & Baddeley (1991) found that articulatory suppression
(for example repeating "the the the" continually) inhibited learning in a foreign language, but not in the native language (cited in Baddeley 2003a: 1.
Each trial began with the digits for articulatory suppression
presented for 1000 ms.
If this hypothesis is correct, articulatory suppression
should disrupt the recall of landmarks in the survey perspective.
If there is a symmetry between the verbal and the visuospatial subsystems of working-memory, we may expect impaired memory spans in the matrix-tapping and the random-interval generation conditions, but not in the articulatory suppression
and the fixed-interval generation conditions.
For example, Gilhooly, Logie, Wetherick, and Wynn (1993) demonstrated that secondary tasks such as articulatory suppression
and spatial tapping, assumed to draw on the resources of the PL and VSSP, respectively, did not disrupt syllogistic reasoning performances.
One line of support for the PL model comes from those studies that have demonstrated the non-additivity of the effects of articulatory suppression
and irrelevant speech.
The purpose of Expt 2 was firstly, to confirm the results obtained in Expt 1, and secondly to investigate the effect of concurrent articulatory suppression
on serial report of visual patterns.
The articulatory suppression
would simply serve to prevent visual information from entering the phonological store.
In a study of Portuguese-English bilinguals, da Costa Pinto (1991) observed faster articulation and larger memory span in Portuguese but found that articulatory suppression
failed to abolish the language difference in digit span.
1 A note is in order here about the articulatory suppression
Although the relationship between reading rate and digit span was in keeping with predictions based on working memory theory, a finding that larger digit span performance in Portuguese was maintained with the introduction of an articulatory suppression
task was not.
In a series of studies of short-term memory for discrete actions, Smyth & Pendleton (1989, 1990) have shown that performing a motor task during the rehearsal interval reduces the memory span in a way comparable to the effect of articulatory suppression
on the memory span for verbal items.
In contrast, articulatory suppression
disrupted a verbal reasoning task, which in turn was not disrupted by concurrent hand movement.
A common technique for this is to use articulatory suppression