Thanks for all the input gentlemen. I actually took a long look at McNemar before the initial post. Most of the info I found stated that it requires a sample size of at least 10 & that's why I was looking at correlation coefficients. After further research I did find some info that states the p value can be calculated using the binomial distribution for small sample sizes & a McNemar exact test. Another additional concern is that after alterations to experiment parameters & data collection that at least 1 & as many as 2 of the contingency table values will be zero. There are 4 possible outcomes (T/T, T/F, F/T, F/F) but the results may only yield 2 or 3 outcomes. Not sure if that will require some type of correction. I'm still looking but I somewhat feel I'm on the right track. Wayne
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