RSAseconds arrives at estimates of respiratory sinus arrhythmia (RSA; a proxy for parasympathetic influence on heart rate) at a second-by-second basis using a multiple window technique and spectrogram analysis.

It is able to read in data (specifically, the IBI series) from MindWare or any format that outputs the IBI series directly. RSAseconds is a freely distributed Matlab toolbox:


Instructions on use are contained in a Word doc within the zip files. We are working towards being able to utilize other data formats. Please do not hesitate to email if you have a different data format thastftn those listed here.

Please reference the following papers if using the program:

Gates, K.M., Gatzke-Kopp, L. M., Sandsten, M., & Blandon, A. Y. (2015). Estimating time-varying RSA to examine psychophysiological linkage in marital dyads. Psychophysiology, 52(8), 1059-1065.  doi: 10.1111/psyp.12428

Hansson, M., & Jӧnsson, P. (2006). Estimation of HRV spectrogram using multiple window methods focusing on the high frequency power. Medical Engineering & Physics, 28(8), 749-761. doi: 10.1016/j.medengphy.2005.11.004