# Simplified Up-Down Method - (SUDO). Anyone use it? **URL:** \ **Category:** Animal Behavior and Models\ **Created:** [October 19, 2016, 5:28pm UTC](https://forum.painresearcher.net/t/simplified-up-down-method-sudo-anyone-use-it/111 "2016-10-19T17:28:12Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![achamess](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.painresearcher.net/achamess/32/534_2.png) [@achamess](https://forum.painresearcher.net/u/achamess)\ **Post date:** [December 15, 2016, 1:18am UTC](https://forum.painresearcher.net/t/simplified-up-down-method-sudo-anyone-use-it/111/6 "2016-12-15T01:18:09Z")
Thanks @Boninrp. this is very useful. That spreadsheet is what I was looking for in a way. I still will have to determine the final response by eye, but thanks for showing how you converted. I appreciate your attention to the details of how to analyze and interpret VF data. We had a recent discussion about log representation of sensory testing in light of the Weber-Fechner law: > [@Log scale/transformation for sensory testing](http://forum.painresearcher.net/t/log-scale-transformation-for-sensory-testing/115/3): > > I agree with the LegakisL and achamess. We are also using log scale in our lab to show PWT (von Frey filaments) and LegakisL pointed out the most important reasons: normal distribution that allowed the use of parametric tests. Unfortunately, there are some referees that do not understand and in some revisions they ask to present the absolute values. We just published a paper (Sci Rep. 2016 May 27;6:26955. doi: 10.1038/srep26955) in which we presented both scales to attend the referee. Do you put your data on a log scale or do a log transformation of the data and then do a linear scale? Calibration of VF hairs is important too. Thanks for pointing out how you do that. I don’t do it nearly enough. I suppose that even if the actual gram forces are inaccurate, relative differences between the mice at any given time will be valid still. But then if you don’t calibrate, any differences between mice over a period of time (weeks or months) won’t really hold. I’m going to continue to use SUDO and will encourage others too as well. --- _[View the full topic](https://forum.painresearcher.net/t/simplified-up-down-method-sudo-anyone-use-it/111)._