Center for Brain, Biology and Behavior, University of Nebraska-Lincoln , Lincoln , NE , USA.
Athletic Medicine, University of Nebraska-Lincoln , Lincoln , NE , USA.
J Clin Exp Neuropsychol. 2019 Nov;41(9):925-932. doi: 10.1080/13803395.2019.1641184. Epub 2019 Aug 5.
: Tests of memory and speed of cognitive and motor responses have been the primary foci in sports-related concussion assessment. This study sought to assess the construct validity of neuropsychological tests within C3 Logix. : Results of both baseline C3 Logix and the Immediate Post-Concussion Assessment and Cognitive Test (ImPACT) computerized tests from 86 Division I collegiate athletes were submitted to a two-factor confirmatory analysis using structural equation modeling. The two factors of Speed and Memory have been confirmed in previous studies of ImPACT. : Results confirmed the two-factor model of ImPACT, whereas C3 Logix did not conform to a pure two-factor model. Instead, along with additional error terms, a cross-loading was required between Speed and Memory factors in order to obtain the best model fit (χ = 22.91, = 0.12, CFI = 0.94, TLI = .90, RMSEA = 0.07 (90% CI [0.00, 0.13], SRMR = .06)): all factor loadings exceeded 0.30. : The final model suggested C3 Logix employs three pure indicators of Speed and one indicator of both Speed and Memory. The lack of a pure indicator of Memory in C3 Logix raises a concern about its specificity and ultimately, its sensitivity to a sports-related concussion.
: 对记忆和认知及运动反应速度的测试一直是运动相关性脑震荡评估的主要焦点。本研究旨在评估 C3 Logix 中的神经心理学测试的结构效度。 : 对 86 名一级大学运动员的 C3 Logix 和即时脑震荡后评估和认知测试 (ImPACT) 计算机测试的基线结果进行了双因素验证性分析，采用结构方程建模。速度和记忆是 ImPACT 之前研究中已经证实的两个因素。 : 结果证实了 ImPACT 的双因素模型，而 C3 Logix 不符合纯双因素模型。相反，为了获得最佳模型拟合，需要在速度和记忆因素之间添加额外的误差项，以便进行交叉加载（χ=22.91，=0.12，CFI=0.94，TLI=0.90，RMSEA=0.07（90%CI [0.00, 0.13]，SRMR=0.06））：所有因素负荷均超过 0.30。 : 最终模型表明，C3 Logix 采用了三个速度的纯指标和一个速度和记忆的混合指标。C3 Logix 中没有记忆的纯指标，这引起了对其特异性的关注，最终对运动相关性脑震荡的敏感性也受到了关注。
