The Multitrait-Multimethod Matrix is used to evaluate construct validity; Sawilowsky (2002) created the I test to analyze the matrix. This article examined the robustness and power of the Sawilowsky I test. Ad hoc critical values were determined to improve the statistical power of the technique for analyzing the Multitrait-Multimethod Matrix.
Cuzzocrea, J., & Sawilowsky, S. S. (2009). Robustness to non-independence and power of the I test for trend in construct validity. Journal of Modern applied Statistical Methods, 8(1), p. 187-198.