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IPN tools for Test-Retest Reliability Analysis



16 Nov 2008 (Updated )

This is one part of my IPN toolbox, aiming at the reliability analysis of neuroimaging meaures.

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The basic functions include the MATLAB implementation of ICC (Intraclass Correlation Coefficient), CCC (Corcordance Correlation Coefficient) and Kendall's W or KCC (Kendall's Coefficient of Concordance).

List of basic functions:

[1]. IPN_icc: computes the interclass correlations for indexing the reliability analysis according to shrout and fleiss' schema.
Shrout PE, Fleiss JL. Intraclass correlations: uses in assessing rater reliability. Psychol Bull. 1979;86:420-428.
[2]. IPN_ccc: computes the concordance correlation coefficient for evaluating reproducibility.
Lin, L.I. 1989. A Corcordance Correlation Coefficient to Evaluate Reproducibility. Biometrics 45, 255-268.
[3]. IPN_kendallW: computes the Kendall's W.
Kendall, M. G. and Babington Smith, B. 1939. The Problem of m Rankings. The Annals of Mathematical Statistics 10 (3): 275–287.

Papers List:
[1]. Zuo XN, Di Martino A, Kelly C, Shehzad ZE, Gee DG, Klein DF, Castellanos FX, Biswal BB, Milham MP. The oscillating brain: Complex and reliable. Neuroimage 49(2): 1432-1445.
[2]. Zuo XN, Kelly C, Adelstein JS, Klein DF, Castellanos FX, Milham MP. 2010. Reliable Intrinsic Connectivity Networks: Test-Retest Evaluation Using ICA and Dual Regression Approach. NeuroImage, in press.


Intraclass Correlation Coefficient (Icc) inspired this file.

This file inspired Manchester.

MATLAB release MATLAB 6.5.1 (R13SP1)
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Comments and Ratings (3)
24 Mar 2010 Xi-Nian Zuo

hi dan, can you post your codes to call kendallW function? it should not be the case it is > 1.

12 Mar 2010 Dan

Hey thanks for uploading this!
I have one question regarding Kendall's coefficient of concordance W: When I choose to correct for ties within the data, I get values > 1. Is that possible? I know it's not supposed to be without correcting for ties.

19 Oct 2009 Jasper Klewer

IPN_CCC calls the functions IPN_sum and IPN_ssd, which are not in the ZIP file. Could you include these in the package?

19 Nov 2008

Deleted several useless files.

22 Nov 2008

Updates the screen shot!

14 Apr 2009

Updates for calculation of Kendall's W including a tied rank correction option.

19 Oct 2009

Added the functions IPN_sum and IPN_ssd and updated the IPN_ccc function with respect to Jasper Klewer's comments.

08 Dec 2009

Remove the function dependency of IPN_mean and IPN_sum.

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