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Bootstrap analysis of the single subject with event related potentials.

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Title: Bootstrap analysis of the single subject with event related potentials.
Authors: Oruç, Ipek (AUTHOR), Krigolson, Olav (AUTHOR), Dalrymple, Kirsten (AUTHOR), Nagamatsu, LindsayS. (AUTHOR), Handy, ToddC. (AUTHOR), Barton, JasonJ. S. (AUTHOR)
Source: Cognitive Neuropsychology. Jul2011, Vol. 28 Issue 5, p322-337. 16p. 1 Diagram, 7 Graphs.
Subjects: Evoked potentials (Electrophysiology), Statistical bootstrapping, Neuropsychology, Case studies, Analysis of variance, Neurological disorders, Statistical sampling
Abstract: Neural correlates of cognitive states in event-related potentials (ERPs) serve as markers for related cerebral processes. Although these are usually evaluated in subject groups, the ability to evaluate such markers statistically in single subjects is essential for case studies in neuropsychology. Here we investigated the use of a simple test based on nonparametric bootstrap confidence intervals for this purpose, by evaluating three different ERP phenomena: the face-selectivity of the N170, error-related negativity, and the P3 component in a Posner cueing paradigm. In each case, we compare single-subject analysis with statistical significance determined using bootstrap to conventional group analysis using analysis of variance (ANOVA). We found that the proportion of subjects who show a significant effect at the individual level based on bootstrap varied, being greatest for the N170 and least for the P3. Furthermore, it correlated with significance at the group level. We conclude that the bootstrap methodology can be a viable option for interpreting single-case ERP amplitude effects in the right setting, probably with well-defined stereotyped peaks that show robust differences at the group level, which may be more characteristic of early sensory components than late cognitive effects. [ABSTRACT FROM PUBLISHER]
Copyright of Cognitive Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Bootstrap analysis of the single subject with event related potentials.
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  Data: <searchLink fieldCode="AR" term="%22Oruç%2C+Ipek%22">Oruç, Ipek</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Krigolson%2C+Olav%22">Krigolson, Olav</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dalrymple%2C+Kirsten%22">Dalrymple, Kirsten</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nagamatsu%2C+LindsayS%2E%22">Nagamatsu, LindsayS.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Handy%2C+ToddC%2E%22">Handy, ToddC.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Barton%2C+JasonJ%2E+S%2E%22">Barton, JasonJ. S.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Cognitive+Neuropsychology%22">Cognitive Neuropsychology</searchLink>. Jul2011, Vol. 28 Issue 5, p322-337. 16p. 1 Diagram, 7 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Evoked+potentials+%28Electrophysiology%29%22">Evoked potentials (Electrophysiology)</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+bootstrapping%22">Statistical bootstrapping</searchLink><br /><searchLink fieldCode="DE" term="%22Neuropsychology%22">Neuropsychology</searchLink><br /><searchLink fieldCode="DE" term="%22Case+studies%22">Case studies</searchLink><br /><searchLink fieldCode="DE" term="%22Analysis+of+variance%22">Analysis of variance</searchLink><br /><searchLink fieldCode="DE" term="%22Neurological+disorders%22">Neurological disorders</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+sampling%22">Statistical sampling</searchLink>
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  Data: Neural correlates of cognitive states in event-related potentials (ERPs) serve as markers for related cerebral processes. Although these are usually evaluated in subject groups, the ability to evaluate such markers statistically in single subjects is essential for case studies in neuropsychology. Here we investigated the use of a simple test based on nonparametric bootstrap confidence intervals for this purpose, by evaluating three different ERP phenomena: the face-selectivity of the N170, error-related negativity, and the P3 component in a Posner cueing paradigm. In each case, we compare single-subject analysis with statistical significance determined using bootstrap to conventional group analysis using analysis of variance (ANOVA). We found that the proportion of subjects who show a significant effect at the individual level based on bootstrap varied, being greatest for the N170 and least for the P3. Furthermore, it correlated with significance at the group level. We conclude that the bootstrap methodology can be a viable option for interpreting single-case ERP amplitude effects in the right setting, probably with well-defined stereotyped peaks that show robust differences at the group level, which may be more characteristic of early sensory components than late cognitive effects. [ABSTRACT FROM PUBLISHER]
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  Data: <i>Copyright of Cognitive Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1080/02643294.2011.648176
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              Text: Jul2011
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