Table 1.

Overview table of techniques for analyzing FFR. All of these measures can be performed on both the transient and sustained regions of the response. Additionally, peak-picking can provide information about the timing of onset and offset responses. On the technologies page of our website, (www.brainvolts.northwestern.edu), you can find links to get access to our stimuli and freeware.

Analytical Technique	Measure of	Polarity	Publications
Peak-picking	Broadband Timing	Single Added	Krizman et al., 2019 Kraus et al., 2016a; White-Schwoch et al., 2015; Anderson et al., 2013a; Hornickel et al., 2009; Parbery-Clark et al., 2009;
Autocorrelation	F0 Periodicity	Single Added	Kraus et al., 2016a; Carcagno & Plack, 2011; Russo et al., 2008; Wong et al., 2007; Krishnan et al., 2005;
Phase consistency	Frequency-specific timing consistency averaged over a response region or using a short-term sliding-window	Single Added Subtracted	Roque et al., 2019; Kachlicka et al., 2019; Omote et al., 2018; Ruggles et al., 2012; Tierney & Kraus, 2013; Zhu et al., 2013;
Cross-phaseogram	Frequency-specific timing differences between pairs of FFRs	Single Added Subtracted	Neef et al., 2017; Strait et al., 2013; Skoe et al., 2011;
RMS/SNR	Broadband response magnitude	Single Added Subtracted	Krizman et al., 2019 Kraus et al., 2016a; Marmel et al., 2013; Strait et al., 2009;
Fast Fourier transform (FFT)	Frequency-specific magnitude. May be short-term, slidingwindow, i.e., spectrogram	Single Added Subtracted	Krizman et al., 2019; Zhao et al., 2019; Musacchia et al., 2019; Skoe et al., 2017; Kraus et al., 2016a; White-Schwoch et al., 2015; Krizman et al., 2012b; Parbery-Clark et al., 2009;
Stimulus-response correlation	Fidelity of the response	Single Added Subtracted	Kraus et al., 2016a; Tierney et al., 2013; Marmel et al., 2013; Parbery-Clark et al., 2009;
Response-response correlation	Consistency and similarity of two FFRs (e.g., Quiet versus Noise). May be run in time-or frequency-domain	Single Added Subtracted	Anderson et al., 2013a; Parbery-Clark et al., 2009;
Response consistency	Broadband consistency across trials within a session	Single Added Subtracted	Otto-Meyer et al., 2018; Neef et al., 2017; White-Schwoch et al., 2015; Krizman et al., 2014; Tierney & Kraus, 2013; Skoe et al., 2013a;