Dialect Switching Uses Same Mechanisms As Language Switching

The cognitive control mechanisms that bilingual people rely on to keep from mixing up two languages also operate in people who speak two dialects, research from an international team of researchers has shown.

Abertay University in Dundee, Scotland partnered with RWTH Aachen University, Germany, to study how quickly the brain can react when asked to switch between standard speech and regional dialects.

When compared to previous language research, the results of the study showed bidialectals displayed the same switching cost pattern as bilinguals who have two equally strong languages, suggesting that different dialects (or closely related language varieties) are stored in the brain in similar ways as different languages.

Cost Of Switching

During the research, conducted in Dundee, study participants were given a list of both English and Dundonian words which then appeared on a colour-coded screen in randomised order.

Depending on the colour, they were asked to say that word in either English or Dundonian – for example they would respond ‘house’ if the image was coloured green or ‘hoose’ if the image was blue.

Other words included in the survey were girl/lassie, armpit/oxter, heart/hert, sausages/sassages, ears/lugs, and children/bairns.

Abertay researchers measured the length of time that elapsed from an image appearing on screen to the participant saying each word, thereby calculating how long each person took to switch between dialects.

At RWTH, Matthieu Declerck and Andrea Philipp carried out the same experiment with people who use standard German and the regional Öcher Platt dialect. Both studies found a ‘switch cost’ where it took participants longer to name pictures when they were asked to move from speaking one variety to another.

It was also discovered that this ‘switch cost’ remained the same for people comfortable with both English and Dundonian, regardless of which direction the switch went.

More Cognitive Effort

However, for those with one language stronger than the other – in this case English participants with little or no previous experience of Dundonian – the ‘switch cost’ was greater when reverting back to speaking English.

Project leader Dr Neil Kirk of Abertay’s Division of Psychology said:

“One explanation for this is that both varieties are always active, but in order to speak one of them, you need to suppress or inhibit the other variety. More cognitive effort is required to suppress a stronger variety and this creates a delay in being able to activate it again."

Dr Kirk, who conducted this research as part of his PhD, supervised by Vera Kempe and Ken-Scott Brown, added:

“In most other studies our bidialectal participants would simply be considered “monolingual,” as language background questionnaires typically do not enquire about dialect usage. Yet the results of our study show that some monolinguals and bilinguals are cognitively not that different."

Neil W. Kirk et al.
Can monolinguals be like bilinguals? Evidence from dialect switching
Cognition, Volume 170, January 2018, Pages 164-178 DOI: 10.1016/j.cognition.2017.10.001