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Cognitive control of conscious error awareness: error awareness and error positivity (Pe) amplitude in moderate-to-severe traumatic brain injury (TBI).

Logan DM, Hill KR, Larson MJ - Front Hum Neurosci (2015)

Bottom Line: Analyses compared between-group no-go accuracy (including accuracy between the first and second halves of the task to measure attention and fatigue), error awareness performance, and Pe amplitude by level of awareness.The M/S TBI group decreased in accuracy and maintained error awareness over time; control participants improved both accuracy and error awareness during the course of the task.Pe amplitude was larger for aware than unaware errors for both groups; however, consistent with previous research on the Pe and TBI, there were no significant between-group differences for Pe amplitudes.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Brigham Young University Provo, UT, USA.

ABSTRACT
Poor awareness has been linked to worse recovery and rehabilitation outcomes following moderate-to-severe traumatic brain injury (M/S TBI). The error positivity (Pe) component of the event-related potential (ERP) is linked to error awareness and cognitive control. Participants included 37 neurologically healthy controls and 24 individuals with M/S TBI who completed a brief neuropsychological battery and the error awareness task (EAT), a modified Stroop go/no-go task that elicits aware and unaware errors. Analyses compared between-group no-go accuracy (including accuracy between the first and second halves of the task to measure attention and fatigue), error awareness performance, and Pe amplitude by level of awareness. The M/S TBI group decreased in accuracy and maintained error awareness over time; control participants improved both accuracy and error awareness during the course of the task. Pe amplitude was larger for aware than unaware errors for both groups; however, consistent with previous research on the Pe and TBI, there were no significant between-group differences for Pe amplitudes. Findings suggest possible attention difficulties and low improvement of performance over time may influence specific aspects of error awareness in M/S TBI.

No MeSH data available.


Related in: MedlinePlus

Grand average waveforms for the Pe component by group.
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Figure 2: Grand average waveforms for the Pe component by group.

Mentions: The Pe ERPs for both groups are presented in Figure 2. Groups did not significantly differ on numbers of trials used for ERP analyses for any condition (ps > 0.05). The M/S TBI group had an average (SD) of 45.4 (21.1) aware errors, 32.4 (25.4) unaware errors, and 413.5 (85.3) correct trials. Controls had means (SD) of 60.9 (25.5) aware errors, 24.5 (18.9) unaware errors, and 805.3 (61.8) correct trials. For the TBI participants, mean (SD) Pe amplitude for unaware errors was 0.1 (1.3) microvolts with a range from -2.0 to 3.7. For aware errors the mean amplitude was 1.9 (2.2) with a range of -2.0 to 5.7. For the control participants, mean (SD) Pe amplitude for unaware errors was -0.2 (2.2) with a range of -8.7 to 6.2 microvolts. For aware errors, the mean Pe amplitude was 1.7 (2.4) with a range of -6.4 to 6.3.


Cognitive control of conscious error awareness: error awareness and error positivity (Pe) amplitude in moderate-to-severe traumatic brain injury (TBI).

Logan DM, Hill KR, Larson MJ - Front Hum Neurosci (2015)

Grand average waveforms for the Pe component by group.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493384&req=5

Figure 2: Grand average waveforms for the Pe component by group.
Mentions: The Pe ERPs for both groups are presented in Figure 2. Groups did not significantly differ on numbers of trials used for ERP analyses for any condition (ps > 0.05). The M/S TBI group had an average (SD) of 45.4 (21.1) aware errors, 32.4 (25.4) unaware errors, and 413.5 (85.3) correct trials. Controls had means (SD) of 60.9 (25.5) aware errors, 24.5 (18.9) unaware errors, and 805.3 (61.8) correct trials. For the TBI participants, mean (SD) Pe amplitude for unaware errors was 0.1 (1.3) microvolts with a range from -2.0 to 3.7. For aware errors the mean amplitude was 1.9 (2.2) with a range of -2.0 to 5.7. For the control participants, mean (SD) Pe amplitude for unaware errors was -0.2 (2.2) with a range of -8.7 to 6.2 microvolts. For aware errors, the mean Pe amplitude was 1.7 (2.4) with a range of -6.4 to 6.3.

Bottom Line: Analyses compared between-group no-go accuracy (including accuracy between the first and second halves of the task to measure attention and fatigue), error awareness performance, and Pe amplitude by level of awareness.The M/S TBI group decreased in accuracy and maintained error awareness over time; control participants improved both accuracy and error awareness during the course of the task.Pe amplitude was larger for aware than unaware errors for both groups; however, consistent with previous research on the Pe and TBI, there were no significant between-group differences for Pe amplitudes.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Brigham Young University Provo, UT, USA.

ABSTRACT
Poor awareness has been linked to worse recovery and rehabilitation outcomes following moderate-to-severe traumatic brain injury (M/S TBI). The error positivity (Pe) component of the event-related potential (ERP) is linked to error awareness and cognitive control. Participants included 37 neurologically healthy controls and 24 individuals with M/S TBI who completed a brief neuropsychological battery and the error awareness task (EAT), a modified Stroop go/no-go task that elicits aware and unaware errors. Analyses compared between-group no-go accuracy (including accuracy between the first and second halves of the task to measure attention and fatigue), error awareness performance, and Pe amplitude by level of awareness. The M/S TBI group decreased in accuracy and maintained error awareness over time; control participants improved both accuracy and error awareness during the course of the task. Pe amplitude was larger for aware than unaware errors for both groups; however, consistent with previous research on the Pe and TBI, there were no significant between-group differences for Pe amplitudes. Findings suggest possible attention difficulties and low improvement of performance over time may influence specific aspects of error awareness in M/S TBI.

No MeSH data available.


Related in: MedlinePlus