Palamedes

PalamedesのDemoから、PAL_PFML_Demoを試す。

PAL_PFML_Demo  Demonstrates use of Palamedes functions to (1) fit a Psychometric Function to some data using a Maximum Likelihood criterion, (2) determine standard errors of free parameters using a bootstrap procedure and (3) determine the goodness-of-fit of the fit.

 

Parametric Bootstrap を指定。以下結果。

Fitting function.....

done:

Threshold estimate: 0.0584

Slope estimate: 66.4521

 

Determining standard errors.....

done:

Standard error of Threshold: 0.0036

Standard error of Slope: 11.1454

 

Determining Goodness-of-fit.....

done:

Deviance: 7.9773

p-value: 0.0900

Elapsed time is 21.034485 seconds.

元データは以下のように指定。

 

%Stimulus intensities

StimLevels = [0.01 0.03 0.05 0.07 0.09 0.11]; 

 

%Number of positive responses (e.g., 'yes' or 'correct' at each of the 

%   entries of 'StimLevels'  

NumPos = [45 55 72 85 91 100];                 

 

%Number of trials at each entry of 'StimLevels'

OutOfNum = [100 100 100 100 100 100];