Moreover, MXD chronologies possess a higher proportion of high-frequency variance than do TRW chronologies and contain a greater fraction of their signal in the higher-frequency domain (Briffa et al., 2002a,b).
We concluded, therefore, that this high-frequency variance arises from lower than normal precision in the reporting of the POG from the eyetracker —that is, a larger than normal random error arising from one iteration to the next between the participant's actual POG and the POG as reported by the eyetracker.
However, high frequency and variance of J2a-M410 in PTGs (primitive tribal groups) like Toda (trasitional pastoralists) and Chenchu (hunter-gatherers and foragers) invoke interesting insights.
Wilcoxon matched pairs test revealed high frequency heart rate variance was higher during resting eyes open than during the go/no-go task.
Furthermore, in our high frequency ultrasound speckle variance analysis of blood flow in a small number of tumours, vascular perfusion was also comparable between ME180 tumours growing in the cervix versus i/m.
We also found that ciliary activity could still be visualized underneath a thick and turbid mucus layer by choice of a sufficiently high frequency band for variance contrast (>3.3 Hz).
Friedman ANOVA revealed differences in heart rate during the different stages of the testing session (Chi Sqr 3,46) = 49.89, p < 0.0001) and differences in high frequency heart rate variance (Chi Sqr 3,46) = 9.77, p < 0.05; Figure 6).
Perceived mental effort during the go/no-go task correlated negatively with heart rate variance high frequency band and positively with the heart rate variance low frequency band and high frequency band ratio.
A parameter of heart rate variance, high frequency activity, decreased upon completion of the three attentional tasks.
Using the wavelet transform, we decompose the variance of the underlying process into the variance of its low frequency and of its high frequency components and we design a variance ratio test of no serial correlation in the presence of dependence.
Increasing the relative level of the high frequency sound also increased the variance of the responses for both owls.
