Limits...
Bilingual language control and general purpose cognitive control among individuals with bilingual aphasia: evidence based on negative priming and flanker tasks.

Dash T, Kar BR - Behav Neurol (2014)

Bottom Line: Bilingualism results in an added advantage with respect to cognitive control.The cumulative distribution function plots were used to visualize the variations in performance across conditions.The results highlight the distinction between general purpose cognitive control and bilingual language control mechanisms.

View Article: PubMed Central - PubMed

Affiliation: Centre of Behavioural and Cognitive Sciences, Senate Hall Campus, University of Allahabad, Allahabad-211002, India.

ABSTRACT

Background: Bilingualism results in an added advantage with respect to cognitive control. The interaction between bilingual language control and general purpose cognitive control systems can also be understood by studying executive control among individuals with bilingual aphasia. objectives: The current study examined the subcomponents of cognitive control in bilingual aphasia. A case study approach was used to investigate whether cognitive control and language control are two separate systems and how factors related to bilingualism interact with control processes.

Methods: Four individuals with bilingual aphasia performed a language background questionnaire, picture description task, and two experimental tasks (nonlinguistic negative priming task and linguistic and nonlinguistic versions of flanker task).

Results: A descriptive approach was used to analyse the data using reaction time and accuracy measures. The cumulative distribution function plots were used to visualize the variations in performance across conditions. The results highlight the distinction between general purpose cognitive control and bilingual language control mechanisms.

Conclusion: All participants showed predominant use of the reactive control mechanism to compensate for the limited resources system. Independent yet interactive systems for bilingual language control and general purpose cognitive control were postulated based on the experimental data derived from individuals with bilingual aphasia.

Show MeSH

Related in: MedlinePlus

(a-b): Reaction time data and CDF plot based on the performance of SC on the flanker task with nonlinguistic stimuli.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4042523&req=5

fig7: (a-b): Reaction time data and CDF plot based on the performance of SC on the flanker task with nonlinguistic stimuli.

Mentions: SC demonstrated a 67.2% accuracy on the nonlinguistic flanker task. However, all the errors were made on the incongruent trials. Thus, the flankers' identity was influencing judgment more than the target's identity on the incongruent trials (see Figure 7(a)). The flanker effect was observed with slower RTs on incongruent trials compared to the congruent trials. RTs on incongruent trials were also compared with congruent and neutral conditions. And the RT distributions showed a uniform difference across conditions throughout the distribution (see Figure 7(b)). These results indicated that SC showed no difference between the slow versus fast trials on any of the conditions, demonstrating that both the proactive and reactive control mechanisms contributed to the flanker effects.


Bilingual language control and general purpose cognitive control among individuals with bilingual aphasia: evidence based on negative priming and flanker tasks.

Dash T, Kar BR - Behav Neurol (2014)

(a-b): Reaction time data and CDF plot based on the performance of SC on the flanker task with nonlinguistic stimuli.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4042523&req=5

fig7: (a-b): Reaction time data and CDF plot based on the performance of SC on the flanker task with nonlinguistic stimuli.
Mentions: SC demonstrated a 67.2% accuracy on the nonlinguistic flanker task. However, all the errors were made on the incongruent trials. Thus, the flankers' identity was influencing judgment more than the target's identity on the incongruent trials (see Figure 7(a)). The flanker effect was observed with slower RTs on incongruent trials compared to the congruent trials. RTs on incongruent trials were also compared with congruent and neutral conditions. And the RT distributions showed a uniform difference across conditions throughout the distribution (see Figure 7(b)). These results indicated that SC showed no difference between the slow versus fast trials on any of the conditions, demonstrating that both the proactive and reactive control mechanisms contributed to the flanker effects.

Bottom Line: Bilingualism results in an added advantage with respect to cognitive control.The cumulative distribution function plots were used to visualize the variations in performance across conditions.The results highlight the distinction between general purpose cognitive control and bilingual language control mechanisms.

View Article: PubMed Central - PubMed

Affiliation: Centre of Behavioural and Cognitive Sciences, Senate Hall Campus, University of Allahabad, Allahabad-211002, India.

ABSTRACT

Background: Bilingualism results in an added advantage with respect to cognitive control. The interaction between bilingual language control and general purpose cognitive control systems can also be understood by studying executive control among individuals with bilingual aphasia. objectives: The current study examined the subcomponents of cognitive control in bilingual aphasia. A case study approach was used to investigate whether cognitive control and language control are two separate systems and how factors related to bilingualism interact with control processes.

Methods: Four individuals with bilingual aphasia performed a language background questionnaire, picture description task, and two experimental tasks (nonlinguistic negative priming task and linguistic and nonlinguistic versions of flanker task).

Results: A descriptive approach was used to analyse the data using reaction time and accuracy measures. The cumulative distribution function plots were used to visualize the variations in performance across conditions. The results highlight the distinction between general purpose cognitive control and bilingual language control mechanisms.

Conclusion: All participants showed predominant use of the reactive control mechanism to compensate for the limited resources system. Independent yet interactive systems for bilingual language control and general purpose cognitive control were postulated based on the experimental data derived from individuals with bilingual aphasia.

Show MeSH
Related in: MedlinePlus