A better estimate of the internal consistency reliability of frontal EEG asymmetry scores.

A better estimate of the internal consistency reliability of frontal EEG asymmetry scores.
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更好地估计额叶脑电图不对称评分的内部一致性可靠性。

DOI:
10.1111/j.1469-8986.2008.00759.x
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发表时间:
2009
期刊:
影响因子:
3.7
通讯作者:
Allen,JohnJB
Allen,JohnJB
中科院分区:
心理学3区
文献类型:
--
作者:
Towers,DavidN;Allen,JohnJB

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额叶 α 不对称性通常使用许多重叠时期的平均 α 功率来计算。以前的报告通过将静息脑电图分为相等持续时间(例如 1 分钟)的片段并将每个片段的不对称得分视为“项目”来估计不对称的内部一致性可靠性,以使用 Cronbach α 估计内部一致性可靠性。 Cronbach 的 alpha 部分取决于项目的数量,因此这种方法可能会因为使用少于可用的不同项目的数量而低估可靠性。本研究(204 名受试者,8 个疗程)中静息脑电图数据的可靠性估计是使用与历元 α 功率的平均分半相关性(作为单独的项目处理)获得的。所有头皮部位和参考方案的估计值在短短 100 个时期内就接近 0.90,这表明额叶不对称的内部一致性比之前报道的要大。
Frontal alpha asymmetry is typically computed using alpha power averaged across many overlapping epochs. Previous reports have estimated the internal consistency reliability of asymmetry by dividing resting EEG sessions into segments of equal duration (e.g., 1 min) and treating asymmetry scores for each segment as “items” to estimate internal consistency reliability using Cronbach's alpha. Cronbach's alpha partly depends on the number of items, such that this approach may underestimate reliability by using less than the number of distinct items available. Reliability estimates for resting EEG data in the present study (204 subjects, 8 sessions) were obtained using mean split‐half correlations with epoch alpha power as treated as separate items. Estimates at all scalp sites and reference schemes approached .90 with as few as 100 epochs, suggesting the internal consistency of frontal asymmetry is greater than that previously reported.
DOI: 10.1037//0022-3514.59.4.791
发表时间: 1990-10
影响因子: 7.6
作者:
A. Tomarken;R. Davidson;Jeffrey B. Henriques
通讯作者: A. Tomarken;R. Davidson;Jeffrey B. Henriques
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