Thoms, A W; Brosnan, J T; Sorochan, J C; Saxton, A M
Exploring relationships in surface-hardness data collected with different instruments Journal Article
In: Journal of Testing and Evaluation, vol. 44, no. 2, pp. 945–951, 2016.
Abstract | Links | BibTeX | Tags: Bermudagrass, Bermudagrasses, Clegg Impact Soil Tester, Concussion, F355, injury, Mechanical engineering, REGRESSION analysis, Synthetic turf, Testing
@article{Thoms2016,
title = {Exploring relationships in surface-hardness data collected with different instruments},
author = {Thoms, A W and Brosnan, J T and Sorochan, J C and Saxton, A M},
doi = {10.1520/JTE20140423},
year = {2016},
date = {2016-01-01},
journal = {Journal of Testing and Evaluation},
volume = {44},
number = {2},
pages = {945--951},
abstract = {Two instruments are used to measure impact attenuation on athletic field playing surfaces: the F355 Apparatus A (F355) and the Clegg Impact Soil Tester (CIST). Although both devices use weighted missiles equipped with accelerometers to measure impact attenuation, Gmax, little information is available in the peer-reviewed scientific literature comparing data collected with these devices on natural and synthetic turf athletic field playing surfaces. A 2-year field study was conducted at the University of Tennessee Center for Athletic Field Safety in 2012 and 2013 to determine whether data collected with a CIST could be used to predict values with the F355. Ten different synthetic turf and four natural turfgrass surfaces constructed over four root zone types were subjected to 30 simulated traffic events at two rates (three events wk-1 and 10 events wk-1). Three impact attenuation samples were collected with both devices on all surfaces for each rate of simulated traffic. Two regression analyses were conducted: one using all 252 data points collected annually and a second that incorporated blocking to account for within surface sampling. In both years, associations between impact attenuation data collected with the CIST and the F355 were weak. CIST values only explained 9 % of the variability in F355 data in 2012 (R2=0.09) and 24 % in 2013 (R2=0.24). When accounting for surface sampling, CIST values only explained 46 % of the variability in F355 data in 2012 (R2=0.46) and 56 % in 2013 (R2=0.56). Residuals around these best-fit regression lines were 625 Gmax, indicating that the CIST cannot accurately predict impact attenuation values with the F355 within this range. Future research should continue to explore relationships between the F355 and CIST across diverse playing surface types and environments. © 2016 ASTM Int'l (all rights reserved).},
keywords = {Bermudagrass, Bermudagrasses, Clegg Impact Soil Tester, Concussion, F355, injury, Mechanical engineering, REGRESSION analysis, Synthetic turf, Testing},
pubstate = {published},
tppubtype = {article}
}
Armistead-Jehle, P; Cooper, D B; Vanderploeg, R D
The role of performance validity tests in the assessment of cognitive functioning after military concussion: A replication and extension Journal Article
In: Applied Neuropsychology. Adult, vol. 23, no. 4, pp. 264–273, 2016.
Abstract | BibTeX | Tags: *Brain Concussion/di [Diagnosis], *Cognitive Dysfunction/di [Diagnosis], *Military Personnel/px [Psychology], *Neuropsychological Tests/st [Standards], adult, Brain Concussion/px [Psychology], Cognitive Dysfunction/px [Psychology], Female, Humans, Male, Malingering/di [Diagnosis], REGRESSION analysis, Reproducibility of Results, Young Adult
@article{Armistead-Jehle2016,
title = {The role of performance validity tests in the assessment of cognitive functioning after military concussion: A replication and extension},
author = {Armistead-Jehle, P and Cooper, D B and Vanderploeg, R D},
year = {2016},
date = {2016-01-01},
journal = {Applied Neuropsychology. Adult},
volume = {23},
number = {4},
pages = {264--273},
abstract = {The current investigation is a replication and extension of a previously published study by Cooper, Vanderploeg, Armistead-Jehle, Lewis, and Bowles (2014) demonstrating that performance validity test scores accounted for more variance in cognitive testing among service members with a history of concussion than did demographic variables, etiology of and time since injury, and symptom severity. The present study included a sample of 142 active-duty service members evaluated following a suspected or confirmed history of mild traumatic brain injury. Participants completed a battery of neuropsychological measures that included scales of performance and symptom validity (specifically the Medical Symptom Validity Test, Nonverbal Medical Symptom Validity Test, and Personality Assessment Inventory). Among the factors considered in the current study, performance validity test results accounted for the most variance in cognitive test scores, above demographic, concussion history, symptom validity, and psychological distress variables. Performance validity test results were modestly related to symptom validity as measured by the Personality Assessment Inventory Negative Impression Management scale. In sum, the current results replicated the original Cooper et al. study and highlight the importance of including performance validity tests as part of neurocognitive evaluation, even in clinical contexts, within this population.},
keywords = {*Brain Concussion/di [Diagnosis], *Cognitive Dysfunction/di [Diagnosis], *Military Personnel/px [Psychology], *Neuropsychological Tests/st [Standards], adult, Brain Concussion/px [Psychology], Cognitive Dysfunction/px [Psychology], Female, Humans, Male, Malingering/di [Diagnosis], REGRESSION analysis, Reproducibility of Results, Young Adult},
pubstate = {published},
tppubtype = {article}
}
Thornton, A E; Cox, D N; Whitfield, K; Fouladi, R T
Cumulative concussion exposure in rugby players: neurocognitive and symptomatic outcomes Journal Article
In: Journal of Clinical & Experimental Neuropsychology, vol. 30, no. 4, pp. 398–409, 2008.
Abstract | BibTeX | Tags: *Brain Concussion/co [Complications], *COGNITION, *Cognition Disorders/et [Etiology], *Football/in [Injuries], adult, Age Factors, aged, Brain Concussion/di [Diagnosis], Female, Humans, Male, middle aged, Neuropsychological Tests, Predictive Value of Tests, REGRESSION analysis, Surveys and Questionnaires, Trauma Severity Indices
@article{Thornton2008a,
title = {Cumulative concussion exposure in rugby players: neurocognitive and symptomatic outcomes},
author = {Thornton, A E and Cox, D N and Whitfield, K and Fouladi, R T},
year = {2008},
date = {2008-01-01},
journal = {Journal of Clinical \& Experimental Neuropsychology},
volume = {30},
number = {4},
pages = {398--409},
abstract = {A total of 111 rugby players underwent comprehensive testing to determine the impact of self-reported concussion exposure. Reliable estimates of concussion exposure were associated with an increase in postconcussion symptoms (PCS), but not diminished neurocognitive functioning. Importantly, the effects of concussion exposure on PCS varied as a function of player status. More specifically, extent of concussion exposure was associated with increased memory complaints and overall PCS endorsements in a dose-dependent manner for retired and older recreational players, but not for those who were younger and playing at more competitive levels. Future work should systematically evaluate the constituent participant factors that may influence differential concussion outcomes.},
keywords = {*Brain Concussion/co [Complications], *COGNITION, *Cognition Disorders/et [Etiology], *Football/in [Injuries], adult, Age Factors, aged, Brain Concussion/di [Diagnosis], Female, Humans, Male, middle aged, Neuropsychological Tests, Predictive Value of Tests, REGRESSION analysis, Surveys and Questionnaires, Trauma Severity Indices},
pubstate = {published},
tppubtype = {article}
}
Thoms, A W; Brosnan, J T; Sorochan, J C; Saxton, A M
Exploring relationships in surface-hardness data collected with different instruments Journal Article
In: Journal of Testing and Evaluation, vol. 44, no. 2, pp. 945–951, 2016.
@article{Thoms2016,
title = {Exploring relationships in surface-hardness data collected with different instruments},
author = {Thoms, A W and Brosnan, J T and Sorochan, J C and Saxton, A M},
doi = {10.1520/JTE20140423},
year = {2016},
date = {2016-01-01},
journal = {Journal of Testing and Evaluation},
volume = {44},
number = {2},
pages = {945--951},
abstract = {Two instruments are used to measure impact attenuation on athletic field playing surfaces: the F355 Apparatus A (F355) and the Clegg Impact Soil Tester (CIST). Although both devices use weighted missiles equipped with accelerometers to measure impact attenuation, Gmax, little information is available in the peer-reviewed scientific literature comparing data collected with these devices on natural and synthetic turf athletic field playing surfaces. A 2-year field study was conducted at the University of Tennessee Center for Athletic Field Safety in 2012 and 2013 to determine whether data collected with a CIST could be used to predict values with the F355. Ten different synthetic turf and four natural turfgrass surfaces constructed over four root zone types were subjected to 30 simulated traffic events at two rates (three events wk-1 and 10 events wk-1). Three impact attenuation samples were collected with both devices on all surfaces for each rate of simulated traffic. Two regression analyses were conducted: one using all 252 data points collected annually and a second that incorporated blocking to account for within surface sampling. In both years, associations between impact attenuation data collected with the CIST and the F355 were weak. CIST values only explained 9 % of the variability in F355 data in 2012 (R2=0.09) and 24 % in 2013 (R2=0.24). When accounting for surface sampling, CIST values only explained 46 % of the variability in F355 data in 2012 (R2=0.46) and 56 % in 2013 (R2=0.56). Residuals around these best-fit regression lines were 625 Gmax, indicating that the CIST cannot accurately predict impact attenuation values with the F355 within this range. Future research should continue to explore relationships between the F355 and CIST across diverse playing surface types and environments. © 2016 ASTM Int'l (all rights reserved).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Armistead-Jehle, P; Cooper, D B; Vanderploeg, R D
The role of performance validity tests in the assessment of cognitive functioning after military concussion: A replication and extension Journal Article
In: Applied Neuropsychology. Adult, vol. 23, no. 4, pp. 264–273, 2016.
@article{Armistead-Jehle2016,
title = {The role of performance validity tests in the assessment of cognitive functioning after military concussion: A replication and extension},
author = {Armistead-Jehle, P and Cooper, D B and Vanderploeg, R D},
year = {2016},
date = {2016-01-01},
journal = {Applied Neuropsychology. Adult},
volume = {23},
number = {4},
pages = {264--273},
abstract = {The current investigation is a replication and extension of a previously published study by Cooper, Vanderploeg, Armistead-Jehle, Lewis, and Bowles (2014) demonstrating that performance validity test scores accounted for more variance in cognitive testing among service members with a history of concussion than did demographic variables, etiology of and time since injury, and symptom severity. The present study included a sample of 142 active-duty service members evaluated following a suspected or confirmed history of mild traumatic brain injury. Participants completed a battery of neuropsychological measures that included scales of performance and symptom validity (specifically the Medical Symptom Validity Test, Nonverbal Medical Symptom Validity Test, and Personality Assessment Inventory). Among the factors considered in the current study, performance validity test results accounted for the most variance in cognitive test scores, above demographic, concussion history, symptom validity, and psychological distress variables. Performance validity test results were modestly related to symptom validity as measured by the Personality Assessment Inventory Negative Impression Management scale. In sum, the current results replicated the original Cooper et al. study and highlight the importance of including performance validity tests as part of neurocognitive evaluation, even in clinical contexts, within this population.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Thornton, A E; Cox, D N; Whitfield, K; Fouladi, R T
Cumulative concussion exposure in rugby players: neurocognitive and symptomatic outcomes Journal Article
In: Journal of Clinical & Experimental Neuropsychology, vol. 30, no. 4, pp. 398–409, 2008.
@article{Thornton2008a,
title = {Cumulative concussion exposure in rugby players: neurocognitive and symptomatic outcomes},
author = {Thornton, A E and Cox, D N and Whitfield, K and Fouladi, R T},
year = {2008},
date = {2008-01-01},
journal = {Journal of Clinical \& Experimental Neuropsychology},
volume = {30},
number = {4},
pages = {398--409},
abstract = {A total of 111 rugby players underwent comprehensive testing to determine the impact of self-reported concussion exposure. Reliable estimates of concussion exposure were associated with an increase in postconcussion symptoms (PCS), but not diminished neurocognitive functioning. Importantly, the effects of concussion exposure on PCS varied as a function of player status. More specifically, extent of concussion exposure was associated with increased memory complaints and overall PCS endorsements in a dose-dependent manner for retired and older recreational players, but not for those who were younger and playing at more competitive levels. Future work should systematically evaluate the constituent participant factors that may influence differential concussion outcomes.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Thoms, A W; Brosnan, J T; Sorochan, J C; Saxton, A M
Exploring relationships in surface-hardness data collected with different instruments Journal Article
In: Journal of Testing and Evaluation, vol. 44, no. 2, pp. 945–951, 2016.
Abstract | Links | BibTeX | Tags: Bermudagrass, Bermudagrasses, Clegg Impact Soil Tester, Concussion, F355, injury, Mechanical engineering, REGRESSION analysis, Synthetic turf, Testing
@article{Thoms2016,
title = {Exploring relationships in surface-hardness data collected with different instruments},
author = {Thoms, A W and Brosnan, J T and Sorochan, J C and Saxton, A M},
doi = {10.1520/JTE20140423},
year = {2016},
date = {2016-01-01},
journal = {Journal of Testing and Evaluation},
volume = {44},
number = {2},
pages = {945--951},
abstract = {Two instruments are used to measure impact attenuation on athletic field playing surfaces: the F355 Apparatus A (F355) and the Clegg Impact Soil Tester (CIST). Although both devices use weighted missiles equipped with accelerometers to measure impact attenuation, Gmax, little information is available in the peer-reviewed scientific literature comparing data collected with these devices on natural and synthetic turf athletic field playing surfaces. A 2-year field study was conducted at the University of Tennessee Center for Athletic Field Safety in 2012 and 2013 to determine whether data collected with a CIST could be used to predict values with the F355. Ten different synthetic turf and four natural turfgrass surfaces constructed over four root zone types were subjected to 30 simulated traffic events at two rates (three events wk-1 and 10 events wk-1). Three impact attenuation samples were collected with both devices on all surfaces for each rate of simulated traffic. Two regression analyses were conducted: one using all 252 data points collected annually and a second that incorporated blocking to account for within surface sampling. In both years, associations between impact attenuation data collected with the CIST and the F355 were weak. CIST values only explained 9 % of the variability in F355 data in 2012 (R2=0.09) and 24 % in 2013 (R2=0.24). When accounting for surface sampling, CIST values only explained 46 % of the variability in F355 data in 2012 (R2=0.46) and 56 % in 2013 (R2=0.56). Residuals around these best-fit regression lines were 625 Gmax, indicating that the CIST cannot accurately predict impact attenuation values with the F355 within this range. Future research should continue to explore relationships between the F355 and CIST across diverse playing surface types and environments. © 2016 ASTM Int'l (all rights reserved).},
keywords = {Bermudagrass, Bermudagrasses, Clegg Impact Soil Tester, Concussion, F355, injury, Mechanical engineering, REGRESSION analysis, Synthetic turf, Testing},
pubstate = {published},
tppubtype = {article}
}
Armistead-Jehle, P; Cooper, D B; Vanderploeg, R D
The role of performance validity tests in the assessment of cognitive functioning after military concussion: A replication and extension Journal Article
In: Applied Neuropsychology. Adult, vol. 23, no. 4, pp. 264–273, 2016.
Abstract | BibTeX | Tags: *Brain Concussion/di [Diagnosis], *Cognitive Dysfunction/di [Diagnosis], *Military Personnel/px [Psychology], *Neuropsychological Tests/st [Standards], adult, Brain Concussion/px [Psychology], Cognitive Dysfunction/px [Psychology], Female, Humans, Male, Malingering/di [Diagnosis], REGRESSION analysis, Reproducibility of Results, Young Adult
@article{Armistead-Jehle2016,
title = {The role of performance validity tests in the assessment of cognitive functioning after military concussion: A replication and extension},
author = {Armistead-Jehle, P and Cooper, D B and Vanderploeg, R D},
year = {2016},
date = {2016-01-01},
journal = {Applied Neuropsychology. Adult},
volume = {23},
number = {4},
pages = {264--273},
abstract = {The current investigation is a replication and extension of a previously published study by Cooper, Vanderploeg, Armistead-Jehle, Lewis, and Bowles (2014) demonstrating that performance validity test scores accounted for more variance in cognitive testing among service members with a history of concussion than did demographic variables, etiology of and time since injury, and symptom severity. The present study included a sample of 142 active-duty service members evaluated following a suspected or confirmed history of mild traumatic brain injury. Participants completed a battery of neuropsychological measures that included scales of performance and symptom validity (specifically the Medical Symptom Validity Test, Nonverbal Medical Symptom Validity Test, and Personality Assessment Inventory). Among the factors considered in the current study, performance validity test results accounted for the most variance in cognitive test scores, above demographic, concussion history, symptom validity, and psychological distress variables. Performance validity test results were modestly related to symptom validity as measured by the Personality Assessment Inventory Negative Impression Management scale. In sum, the current results replicated the original Cooper et al. study and highlight the importance of including performance validity tests as part of neurocognitive evaluation, even in clinical contexts, within this population.},
keywords = {*Brain Concussion/di [Diagnosis], *Cognitive Dysfunction/di [Diagnosis], *Military Personnel/px [Psychology], *Neuropsychological Tests/st [Standards], adult, Brain Concussion/px [Psychology], Cognitive Dysfunction/px [Psychology], Female, Humans, Male, Malingering/di [Diagnosis], REGRESSION analysis, Reproducibility of Results, Young Adult},
pubstate = {published},
tppubtype = {article}
}
Thornton, A E; Cox, D N; Whitfield, K; Fouladi, R T
Cumulative concussion exposure in rugby players: neurocognitive and symptomatic outcomes Journal Article
In: Journal of Clinical & Experimental Neuropsychology, vol. 30, no. 4, pp. 398–409, 2008.
Abstract | BibTeX | Tags: *Brain Concussion/co [Complications], *COGNITION, *Cognition Disorders/et [Etiology], *Football/in [Injuries], adult, Age Factors, aged, Brain Concussion/di [Diagnosis], Female, Humans, Male, middle aged, Neuropsychological Tests, Predictive Value of Tests, REGRESSION analysis, Surveys and Questionnaires, Trauma Severity Indices
@article{Thornton2008a,
title = {Cumulative concussion exposure in rugby players: neurocognitive and symptomatic outcomes},
author = {Thornton, A E and Cox, D N and Whitfield, K and Fouladi, R T},
year = {2008},
date = {2008-01-01},
journal = {Journal of Clinical \& Experimental Neuropsychology},
volume = {30},
number = {4},
pages = {398--409},
abstract = {A total of 111 rugby players underwent comprehensive testing to determine the impact of self-reported concussion exposure. Reliable estimates of concussion exposure were associated with an increase in postconcussion symptoms (PCS), but not diminished neurocognitive functioning. Importantly, the effects of concussion exposure on PCS varied as a function of player status. More specifically, extent of concussion exposure was associated with increased memory complaints and overall PCS endorsements in a dose-dependent manner for retired and older recreational players, but not for those who were younger and playing at more competitive levels. Future work should systematically evaluate the constituent participant factors that may influence differential concussion outcomes.},
keywords = {*Brain Concussion/co [Complications], *COGNITION, *Cognition Disorders/et [Etiology], *Football/in [Injuries], adult, Age Factors, aged, Brain Concussion/di [Diagnosis], Female, Humans, Male, middle aged, Neuropsychological Tests, Predictive Value of Tests, REGRESSION analysis, Surveys and Questionnaires, Trauma Severity Indices},
pubstate = {published},
tppubtype = {article}
}