[Eeglablist] Question about ERSP statistics

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Oct 7 16:09:03 PDT 2015


Dear Lianyang,

I'm a volunteer in the mailing list and not an official EEGLAB developper.
That's why I've been directing those questions that I can't answer to
EEGLAB bugzilla. This means that I'm a part of question filter and not a
bug fixing engine. Sorry about it.

Makoto

On Wed, Oct 7, 2015 at 3:52 PM, Lianyang Li <lli26 at uh.edu> wrote:

> Hi Makoto
>
> I am pretty sure that my preprocessing is correct. Actually, my problem is
> the same as Alice's.
> Hope you can solve this problem soon.
>
> Thanks
>
> On Wed, Oct 7, 2015 at 5:38 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> wrote:
>
>> Dear Lianyang,
>>
>> If I understand it correctly it's a subtraction after dB conversion, so
>> it's a division, but anyway yes 'subtract baseline' I mean is that.
>>
>> Makoto
>>
>>
>> On Wed, Oct 7, 2015 at 3:35 PM, Lianyang Li <lli26 at uh.edu> wrote:
>>
>>> Hi Makoto
>>>
>>> Thank you very much for your reply. I want to verify your meaning of
>>> "subtract baseline".
>>> Before computing ERSP, I have removed the baseline of each trial of each
>>> subject with prestimulus, e.g [-200 0]. Is that what you said?
>>> Or should I remove the baseline with the whole range or remove baseline
>>> of ERSP results?
>>>
>>> Thanks
>>> Lianyang
>>>
>>> On Tue, Oct 6, 2015 at 12:12 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
>>> wrote:
>>>
>>>> Dear Lianyang,
>>>>
>>>> My initial guess: in the 2.png you did not subtract baseline, did you?
>>>>
>>>> Makoto
>>>>
>>>> On Fri, Sep 25, 2015 at 3:44 PM, Lianyang Li <lli26 at uh.edu> wrote:
>>>>
>>>>> Hi Dear all
>>>>>
>>>>> I came across some problems when I was do the ERSP statistics with
>>>>> single trials.
>>>>> I have 2 groups of data(mTBI and normal), both have four
>>>>> conditions(1,3,5,7). After pre-computing the ERSP and save the single trial
>>>>> information, I tried to get some statistics results based on that.
>>>>> The parameters are shown in the Figure 1.
>>>>> The results using single trials are shown in the Figure 2.
>>>>> The results without single trials are shown in the Figure 3.
>>>>> My question is the scale in Figure 2 seems to be too much larger than
>>>>> that of Figure 3. I cannot understand these difference and hardly find some
>>>>> information about this online or in help. So that I cannot make sure if the
>>>>> p-value is reliable. Would you please help me with this?
>>>>>
>>>>> Thanks
>>>>> Lianyang
>>>>>
>>>>> --
>>>>>
>>>>> U
>>>>>   H
>>>>>
>>>>> UNIVERSITY *of * HOUSTON
>>>>>
>>>>>
>>>>> Engineering Technology, Computer Science,
>>>>> Electrical and Computer Engineering
>>>>>
>>>>>
>>>>>
>>>>> *Lianyang Li , Graduate Student. Research AssistantBiomedical Imaging
>>>>> Lab*
>>>>>
>>>>> Philip G. Hoffman Hall   •   Houston, TX 77204-3058   •   Room 233
>>>>> Phone: *832-607-6588 <832-607-6588>*  E-mail: *lli26 at uh.edu
>>>>> <lli26 at uh.edu>*  Web: *http://www.tearsmorethansaid.com/
>>>>> <http://www.tearsmorethansaid.com/>*
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Makoto Miyakoshi
>>>> Swartz Center for Computational Neuroscience
>>>> Institute for Neural Computation, University of California San Diego
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> U
>>>   H
>>>
>>> UNIVERSITY *of * HOUSTON
>>>
>>>
>>> Engineering Technology, Computer Science,
>>> Electrical and Computer Engineering
>>>
>>>
>>>
>>> *Lianyang Li , Graduate Student. Research AssistantBiomedical Imaging
>>> Lab*
>>>
>>> Philip G. Hoffman Hall   •   Houston, TX 77204-3058   •   Room 233
>>> Phone: *832-607-6588 <832-607-6588>*  E-mail: *lli26 at uh.edu
>>> <lli26 at uh.edu>*  Web: *http://www.tearsmorethansaid.com/
>>> <http://www.tearsmorethansaid.com/>*
>>>
>>>
>>>
>>
>>
>> --
>> Makoto Miyakoshi
>> Swartz Center for Computational Neuroscience
>> Institute for Neural Computation, University of California San Diego
>>
>
>
>
> --
>
> U
>   H
>
> UNIVERSITY *of * HOUSTON
>
>
> Engineering Technology, Computer Science,
> Electrical and Computer Engineering
>
>
>
> *Lianyang Li , Graduate Student. Research AssistantBiomedical Imaging Lab*
>
> Philip G. Hoffman Hall   •   Houston, TX 77204-3058   •   Room 233
> Phone: *832-607-6588 <832-607-6588>*  E-mail: *lli26 at uh.edu
> <lli26 at uh.edu>*  Web: *http://www.tearsmorethansaid.com/
> <http://www.tearsmorethansaid.com/>*
>
>
>


-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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