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Evidence for associations between Rey-Osterrieth Complex Figure test and motor skill learning in older adults

Jennapher Lingo VanGilder, Keith Lohse, Kevin Duff, Peiyuan Wang, Sydney Schaefer,

Abstract Age-related declines in motor learning may be related to poor visuospatial function. Thus, visuospatial testing could evaluate older adults’ potential for motor learning, which has implications for geriatric motor rehabilitation. To this end, the purpose of this study was to identify which visuospatial test is most predictive of motor ... Read more >>

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Validation of one-year reliable change in the RBANS for community-dwelling older adults with amnestic mild cognitive impairment.

Dustin B Hammers, Kayla R Suhrie, Sariah M Porter, Ava M Dixon, Kevin Duff,

OBJECTIVE:The current study sought to externally validate previously published standardized regression-based (SRB) equations for the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) Indexes administered twice over a one-year period. Method: Hammers and colleagues' SRB prediction equations were applied to two independent samples of community-dwelling older adults with amnestic ... Read more >>

Clin Neuropsychol (The Clinical neuropsychologist)
[2020, :1-24]

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Validating 1-Year Reliable Change Methods.

Dustin B Hammers, Sariah Porter, Ava Dixon, Kayla R Suhrie, Kevin Duff,

OBJECTIVE:reliable change methods can assist in the determination of whether observed changes in performance are meaningful. The current study sought to validate previously published 1-year standardized regression-based (SRB) equations for commonly administered neuropsychological measures that incorporated baseline performances, demographics, and 1-week practice effects. METHOD:Duff et al.'s SRB prediction equations were applied ... Read more >>

Arch Clin Neuropsychol (Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists)
[2020, :]

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Recognition subtests for the Repeatable Battery for the Assessment of Neuropsychological Status: Preliminary data in cognitively intact older adults, amnestic Mild Cognitive Impairment, and Alzheimer's disease.

Kevin Duff, Kayla R Suhrie, Bonnie C A Dalley, Sariah M Porter, Ava M Dixon,

OBJECTIVE:The Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) has three delayed recall subtests (list, story, figure), but only one delayed recognition subtest (list). Since comparisons between delayed recall and recognition can be useful in clinical neuropsychology, the current study sought to develop and preliminarily examine two proposed new ... Read more >>

Clin Neuropsychol (The Clinical neuropsychologist)
[2020, :1-11]

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The independent living scale in amnestic mild cognitive impairment: Relationships to demographic variables and cognitive performance.

Kevin Duff, Sariah Porter, Ava Dixon, Kayla Suhrie, Dustin Hammers,

INTRODUCTION:The Independent Living Scales (ILS) is an objective measure of day-to-day functioning, which can be used to aid in diagnosing dementia in older adults with cognitive impairments. However, no studies have examined this measure in individuals with Mild Cognitive Impairment (MCI), a prodromal phase of dementia. METHOD:Therefore, we sought to ... Read more >>

J Clin Exp Neuropsychol (Journal of clinical and experimental neuropsychology)
[2020, 42(7):725-734]

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Practice effects in mild cognitive impairment: A validation of Calamia et al. (2012).

Kevin Duff, Dustin B Hammers,

Objective: In a meta-analysis examining practice effects on repeated neuropsychological testing, Calamia et al. (2012) provided information to predict practice effects in healthy and clinical samples across a range of cognitive domains. However, these estimates have not been validated.Method: This study used these prediction estimate calculations to predict follow-up scores across ... Read more >>

Clin Neuropsychol (The Clinical neuropsychologist)
[2020, :1-13]

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Validation of one-week reliable change methods in cognitively intact community-dwelling older adults.

Dustin B Hammers, Kayla R Suhrie, Ava Dixon, Sariah Porter, Kevin Duff,

OBJECTIVE:Reliable change methods can assist the determination of whether observed changes in performance are meaningful. The current study sought to validate previously published standardized regression-based (SRB) equations for commonly administered cognitive tests using a cognitively intact sample of older adults, and extend findings by including relevant demographic and test-related variables ... Read more >>

Neuropsychol Dev Cogn B Aging Neuropsychol Cogn (Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition)
[2020, :1-21]

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Cognitive composites in AD trials? Drinking the Kool-Aid and paying the price?

Kevin Duff,

Alzheimers Dement (Amst) (Alzheimer's & dementia (Amsterdam, Netherlands))
[2020, 12(1):e12011]

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The ONETEP linear-scaling density functional theory program.

Joseph C A Prentice, Jolyon Aarons, James C Womack, Alice E A Allen, Lampros Andrinopoulos, Lucian Anton, Robert A Bell, Arihant Bhandari, Gabriel A Bramley, Robert J Charlton, Rebecca J Clements, Daniel J Cole, Gabriel Constantinescu, Fabiano Corsetti, Simon M-M Dubois, Kevin K B Duff, José María Escartín, Andrea Greco, Quintin Hill, Louis P Lee, Edward Linscott, David D O'Regan, Maximillian J S Phipps, Laura E Ratcliff, Álvaro Ruiz Serrano, Edward W Tait, Gilberto Teobaldi, Valerio Vitale, Nelson Yeung, Tim J Zuehlsdorff, Jacek Dziedzic, Peter D Haynes, Nicholas D M Hine, Arash A Mostofi, Mike C Payne, Chris-Kriton Skylaris,

We present an overview of the onetep program for linear-scaling density functional theory (DFT) calculations with large basis set (plane-wave) accuracy on parallel computers. The DFT energy is computed from the density matrix, which is constructed from spatially localized orbitals we call Non-orthogonal Generalized Wannier Functions (NGWFs), expressed in terms ... Read more >>

J Chem Phys (The Journal of chemical physics)
[2020, 152(17):174111]

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Generalizability of reliable change equations for the RBANS over one year in community-dwelling older adults.

Dustin B Hammers, Kayla R Suhrie, Sariah M Porter, Ava M Dixon, Kevin Duff,

Objective: Reliable change methods can assist neuropsychologists in determining whether observed changes in a patient's performance are clinically meaningful. The current study sought to validate previously published standardized regression-based (SRB) equations for the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) Indexes and subtests.Methods: Duff and colleagues's SRB prediction ... Read more >>

J Clin Exp Neuropsychol (Journal of clinical and experimental neuropsychology)
[2020, 42(4):394-405]

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Reliable change in cognition over 1 week in community-dwelling older adults: a validation and extension study.

Dustin B Hammers, Kayla R Suhrie, Ava Dixon, Sariah Porter, Kevin Duff,

OBJECTIVE:Reliable change methods can aid neuropsychologists in understanding if performance differences over time represent clinically meaningful change or reflect benefit from practice. The current study sought to externally validate the previously published standardized regression-based (SRB) prediction equations developed by Duff for commonly administered cognitive measures. METHOD:This study applied Duff's SRB ... Read more >>

Arch Clin Neuropsychol (Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists)
[2020, :]

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Using a Timed Motor Task to Predict One-Year Functional Decline in Amnestic Mild Cognitive Impairment.

Sydney Y Schaefer, Andrew Hooyman, Kevin Duff,

Affordable, noninvasive methods of predicting functional decline are needed for individuals at risk for Alzheimer's disease. This study tested whether a timed upper-extremity motor task predicted functional decline over one year in 79 adults diagnosed with amnestic mild cognitive impairment. Participants completed subjective and objective measures of daily functioning at ... Read more >>

J. Alzheimers Dis. (Journal of Alzheimer's disease : JAD)
[2020, 77(1):53-58]

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Application of Different Standard Error Estimates in Reliable Change Methods.

Dustin B Hammers, Kevin Duff,

OBJECTIVE:This study attempted to clarify the applicability of standard error (SE) terms in clinical research when examining the impact of short-term practice effects on cognitive performance via reliable change methodology. METHOD:This study compared McSweeney's SE of the estimate (SEest) to Crawford and Howell's SE for prediction of the regression (SEpred) ... Read more >>

Arch Clin Neuropsychol (Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists)
[2019, :]

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Cognitive decline on the Repeatable Battery for the Assessment of Neuropsychological Status in progressive supranuclear palsy.

Kevin Duff, Christopher Randolph, Adam L Boxer,

Objective: Progressive supranuclear palsy (PSP) is associated with a variety of cognitive deficits, but few studies have reported on its cognitive trajectory across time, especially on the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS).Methods: Two hundred twenty participants diagnosed with Richardson's syndrome of PSP (PSP-RS) were evaluated with ... Read more >>

Clin Neuropsychol (The Clinical neuropsychologist)
[2020, 34(3):529-540]

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Dopamine replacement improves motor learning of an upper extremity task in people with Parkinson disease.

Serene S Paul, Leland E Dibble, Genevieve N Olivier, Christopher Walter, Kevin Duff, Sydney Y Schaefer,

BACKGROUND:Dopamine replacement medication has positive effects on existing motor skills for people with Parkinson disease (PD), but may have detrimental effects on the learning of motor skills necessary for effective rehabilitation according to the dopamine overdose hypothesis. OBJECTIVES:This study aimed to determine whether dopamine replacement medication (i.e. levodopa) affects: learning ... Read more >>

Behav. Brain Res. (Behavioural brain research)
[2020, 377:112213]

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Long-term Changes in 18F-Flutemetamol Uptake in Nondemented Older Adults.

Kevin Duff, Kevin P Horn, John M Hoffman,

PURPOSE:Longitudinal studies into the variability of F-Flutemetamol uptake are lacking. METHODS/PATIENTS:Therefore, the current study examined change in F-Flutemetamol uptake in 19 nondemented older adults (65 to 82 y old) who were either cognitively intact or had Mild Cognitive Impairment (MCI) who were scanned twice across 3.6 years. RESULTS:Baseline and follow-up composite ... Read more >>

Alzheimer Dis Assoc Disord (Alzheimer disease and associated disorders)
[2019, 33(2):113-117]

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Predicting Premorbid Scores on the Repeatable Battery for the Assessment of Neuropsychological Status and their Validation in an Elderly Sample.

Kevin Duff, Bonnie C A Dalley, Kayla R Suhrie, Dustin B Hammers,

OBJECTIVE:Assessing cognitive change during a single visit requires the comparison of estimated premorbid abilities and current neuropsychological functioning. Although premorbid intellect has been widely examined, premorbid expectations for other cognitive abilities have received less attention. The current study sought to develop and validate premorbid estimates for the Repeatable Battery for ... Read more >>

Arch Clin Neuropsychol (Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists)
[2019, 34(3):395-402]

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Cognitive deficits in progressive supranuclear palsy on the Repeatable Battery for the Assessment of Neuropsychological Status.

Kevin Duff, Dana McDermott, Dan Luong, Christopher Randolph, Adam L Boxer,

Progressive supranuclear palsy (PSP) is associated with a variety of cognitive deficits, as well as motor and psychiatric disturbances. As clinical trials for PSP evolve, briefer screening instruments will be needed to determine cognitive effects of interventions. The Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) may fill this ... Read more >>

J Clin Exp Neuropsychol (Journal of clinical and experimental neuropsychology)
[2019, 41(5):469-475]

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Regression-based formulas for predicting change in memory test scores in healthy older adults: Comparing use of raw versus standardized scores.

January Durant, Kevin Duff, Justin B Miller,

INTRODUCTION:Standardized regression based (SRB) methods can be used to determine whether meaningful changes in performance on cognitive assessments occur over time. Both raw and standardized scores have been used in SRB models but it is unclear which score metric is most appropriate for predicting follow-up performance. The aim of the ... Read more >>

J Clin Exp Neuropsychol (Journal of clinical and experimental neuropsychology)
[2019, 41(5):460-468]

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Within-Session Practice Effects in the Jebsen Hand Function Test (JHFT).

Sydney Y Schaefer, Ashley Saba, Jessica F Baird, Melissa B Kolar, Kevin Duff, Jill C Stewart,

The Jebsen Hand Function Test (JHFT) is a standardized assessment that has been used as a clinical outcome measure. To appropriately interpret the effects of an intervention on hand function (as measured by the JHFT), the extent to which this instrument shows significant practice effects must be quantified. The purpose ... Read more >>

Am J Occup Ther (The American journal of occupational therapy : official publication of the American Occupational Therapy Association)
[2018, 72(6):7206345010p1-7206345010p5]

Cited: 1 time

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Short-term repeat cognitive testing and its relationship to hippocampal volumes in older adults.

Kevin Duff, Jeffrey S Anderson, Atul K Mallik, Kayla R Suhrie, Taylor J Atkinson, Bonnie C A Dalley, Sarah Shizuko Morimoto, John M Hoffman,

BACKGROUND:Practice effects are improvements in cognitive test scores due to repeated exposure to testing materials. If practice effects provide information about Alzheimer's disease pathology, then they could be useful for clinical trials enrichment. The current study sought to add to the limited literature on short-term practice effects on cognitive tests ... Read more >>

J Clin Neurosci (Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia)
[2018, 57:121-125]

Cited: 2 times

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External validation of change formulae in neuropsychology with neuroimaging biomarkers: A methodological recommendation and preliminary clinical data.

Kevin Duff, Kayla R Suhrie, Bonnie C A Dalley, Jeffrey S Anderson, John M Hoffman,

OBJECTIVE:Within neuropsychology, a number of mathematical formulae (e.g. reliable change index, standardized regression based) have been used to determine if change across time has reliably occurred. When these formulae have been compared, they often produce different results, but 'different' results do not necessarily indicate which formulae are 'best.' The current ... Read more >>

Clin Neuropsychol (The Clinical neuropsychologist)
[2019, 33(3):478-489]

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RBANS Validity Indices: a Systematic Review and Meta-Analysis.

Robert D Shura, Timothy W Brearly, Jared A Rowland, Sarah L Martindale, Holly M Miskey, Kevin Duff,

Neuropsychology practice organizations have highlighted the need for thorough evaluation of performance validity as part of the neuropsychological assessment process. Embedded validity indices are derived from existing measures and expand the scope of validity assessment. The Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) is a brief instrument that ... Read more >>

Neuropsychol Rev (Neuropsychology review)
[2018, 28(3):269-284]

Cited: 1 time

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Rating scales for cognition in Huntington's disease: Critique and recommendations.

Tiago A Mestre, Anne-Catherine Bachoud-Lévi, Johan Marinus, Julie C Stout, Jane S Paulsen, Peter Como, Kevin Duff, Cristina Sampaio, Christopher G Goetz, Esther Cubo, Glenn T Stebbins, Pablo Martinez-Martin, ,

Cognitive impairment is one of the main features of Huntington's disease and is present across the disease spectrum. As part of the International Parkinson's Disease and Movement Disorder Society-sponsored project to review all clinical rating scales used in Huntington's disease, a systematic review of the literature was performed to identify ... Read more >>

Mov. Disord. (Movement disorders : official journal of the Movement Disorder Society)
[2018, 33(2):187-195]

Cited: 2 times

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When it just won't go away: oral artemisinin monotherapy in Nigeria, threatening lives, threatening progress.

, Chinazo Ujuju, Jennifer Anyanti, Paul N Newton, Godwin Ntadom,

Oral artemisinin monotherapy (AMT), an important contributor to multi-drug resistant malaria, has been banned in Nigeria. While oral AMT has scarcely been found for several years now in other malaria-endemic countries, availability has persisted in Nigeria's private sector. In 2015, the ACTwatch project conducted a nationally representative outlet survey. Results ... Read more >>

Malar. J. (Malaria journal)
[2017, 16(1):489]

Cited: 1 time

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