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19102208
Germany
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 Posted - 11/01/2007 : 10:05:20 AM
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Hi,
I want to fit and compare psychophysical/psychometric
sigmoid functions with Origin.
Is there a way for correct fitting psychometric functions?
In addition I want to compare the point of subjective equality, PSE
for two different sets statistically.
Is there a way doing it with Origin? (e.g. Bootstrap)
Origin Version (7):
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larry_lan
China
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Posted - 11/02/2007 : 02:33:14 AM
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Hi:
I am not familiar to psychometric function. Could you provide the function form and sample data and then we can have a try? If the dataset is large, please email tech@originlab.com
Thanks
Larry
OriginLab Technical Services
Edited by - larry_lan on 11/02/2007 02:33:47 AM |
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19102208
Germany
Posts |
Posted - 11/07/2007 : 10:57:10 AM
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Here is a example data set. It is usual to fit it
with cumulative gaussian. Is there an option in origin?
-0,5 0
-0,3 0
-0,2 0
-0,1 0
-0,05 0
-0,04 0
-0,03 0
-0,02 0
-0,01 0
0,01 33,333
0,02 16,667
0,03 50
0,04 66,667
0,05 83,333
0,1 100
0,2 100
0,3 100
0,5 100
Comparing to different functions needs e.g. the Bootstrap method.
Is there anything like that in Origin?
http://en.wikipedia.org/wiki/Psychometric_function
http://personalpages.manchester.ac.uk/staff/david.foster/Research/bootstrap.html
http://www.kyb.mpg.de/publication.html?publ=944
Thanks for help.
Edited by - 19102208 on 11/07/2007 11:18:35 AM |
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Psychometric/Sigmoid Functions and Statistics