William Vaughn McCall

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Questions related from William Vaughn McCall

How do you interpret Likelihood ratio tests versus parameter estimates in logistic regression?

The logistic regression output for the JMP statistical package reports separate Chi square values and separate p-values for each independent variable in the form of Likelihood Ratio tests and as...

16 April 2025 1,148 4 View

Are higher scores better or worse on the delayed portion of the Penn Face Memory Test (PFMT)?

24 January 2024 2,884 2 View

Are higher scores better or worse on the The Penn Emotion Differentiation Test (EMD)?

24 January 2024 5,544 0 View

Does a signed consent form in a clinical trial place requirements on the investigator with a force similar to a legal contract?

For example, if the consent form says that the data collected from the study will benefit humanity because the investigator will analyze the data and publish it, must the investigator make an...

11 December 2023 5,437 3 View

Is there an intuitive interpretation of frequency analysis in heart rate variability?

I am an encephalographer (meaning I read EEG), and it is easy to understand frequency analyses of EEG because visual inspection of an EEG gives an impression of how much alpha, beta, theta, and...

10 February 2023 221 2 View

What is the difference between "%" and "(nu)" in regards to Heart Rate Variability metrics?

Frequency analyses of heart rate variability often includes reports of high frequency (HF) or low frequency (LF) power, % power, and normalized power (nu). Given that absolute total power in the...

17 January 2023 3,602 5 View

Can someone supply a "fillable" or "modifiable" triangular figure to illustrate a mediation analysis?

I have completed a mediation analysis with three variable: an independent variable, a dependent variable, and a mediator. i am not a good graphic artist! Can someone supply a figure showing a...

04 February 2022 310 3 View

Whose responsibility is it to generate queries in clinical trials?

I am at loggerheads with a sponsor of a clinical trial that is declaring that they have no responsibility for identifying queries that need to be resolved at clinical trial sites within a multi...

01 January 1970 1,655 3 View