<div dir="ltr">
<p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Hey Marius,<span></span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Thank you very much for your explanation. If possible, two more questions about baseline:<span></span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">1) If I want to test the impact of different baselines on the results, can I simply just calculate these different baselines without recalculating all the data again? If yes, how can I ‘only’ calculate the baseline?<span></span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">2) Why do we prefer to divide the power values by the power values of the baseline, rather than subtracting the values of the baseline from the power values?<span></span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Best wishes,<span></span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p><p class="gmail-MsoNoSpacing" style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Kamia</p>
<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 22, 2018 at 10:17 AM, Marius Klug <span dir="ltr"><<a href="mailto:marius.s.klug@gmail.com" target="_blank">marius.s.klug@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>Hi Kamia,<br><br></div>ERSPs are always interpreted in comparison to a baseline. There are several different ways of doing this, the most frequently used is dividing the power values (not dB transformed) or the epoch by the power values of the baseline. Usually this is done automatically by newtimef such that it computes the baseline (by thefault this is the prestimulus average) by itself. However, if you want, you can enter a baseline you precomputed yourself and use that one instead. This is done by using the 'powbase' parameter and providing a vector with the baseline power values for each frequency.<br><br></div><div>In case you are unsure what you're doing here, don't use this parameter, but use the 'baseline' parameter and enter the millisecond frame which time points should be taken as baseline.<br></div><div><br></div>I hope this helped!<br><br></div>Best,<br></div>Marius<br></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">2018-03-18 10:06 GMT+01:00 Kamia Kavi <span dir="ltr"><<a href="mailto:kamiakavi@gmail.com" target="_blank">kamiakavi@gmail.com</a>></span>:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div dir="ltr">
<p class="m_1275900009270943040m_6149025835446160812gmail-MsoNoSpacing" style="margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Can anyone explain what ‘powbase’ parameter do in ERSP
and when we should use this option?<span></span></p>
<p class="m_1275900009270943040m_6149025835446160812gmail-MsoNoSpacing" style="margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="m_1275900009270943040m_6149025835446160812gmail-MsoNoSpacing" style="margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Best wishes,<span class="m_1275900009270943040HOEnZb"><font color="#888888"><span></span></font></span></p><span class="m_1275900009270943040HOEnZb"><font color="#888888">
<p class="m_1275900009270943040m_6149025835446160812gmail-MsoNoSpacing" style="margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="m_1275900009270943040m_6149025835446160812gmail-MsoNoSpacing" style="margin:0in 0in 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Kamia<span></span></p><br></font></span></div>
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