Palamedes Toolbox Forum

Please read this to help us make this forum great
We’re glad you are visiting the Palamedes Toolbox Forum and we hope that this Forum will help you and that you will help others. Please help us make this forum great by following these guidelines:

Please note that this is a user forum! Direct your questions/comments to the entire community of Palamedes users, not just the authors. The authors may not monitor this forum on a regular basis and directing questions at the authors may dissuade other users from helping you.

Write clear posts that include detail. For example, this post: “When I try to use PAL_pdfNormal it crashes” will likely either get no replies or replies that ask for more information. Instead, write a post like this: “I tried to use PAL_pdfNormal, but when I give the command: PAL_pdfNormal([0,1,2]) I get this error message: ‘Not enough input arguments. Error in PAL_pdfNormal (line 24)
y = exp(-1.*(x-Mean).^2./(2*SD.^2))./((2*pi).^.5*SD);’ I’m using Palamedes version x.x.x, and run Octave version x.x.x on my MAC OS version x.x.x”

If you include code that doesn’t produce the result you expected (e.g., because it generated an error) make the code as short as possible while still being self-contained. For example, instead of posting the code: “PAL_pdfNormal(xs, mymean, mysd)”, post the code: “xs = 1:10; mymean = 0; mysd = 1; PAL_pdfNormal(xs,mymean,mysd)”. In order to check whether your code is self-contained, clear all your variables (type: clear all in your command window) then copy and paste the code you plan to include in your post and see if it behaves as it did before you issued the clear all command.

If you plan to share code, respect intellectual property. Only post code that you wrote or make sure you have the right to post the code. This also goes for code you modified from another source. For example, you may not post Palamedes routines that you modified (it is okay however to post modified versions of routines that are in the PalamedesDemos folder).

Respect others. Remember that at one point in your life you knew less about the topic another user asks about than they do now.

News
Check here for posts on the latest news on this forum, the Palamedes Toolbox and our text Psychophyiscs: A Practical Introduction.

Palamedes Installation
Can't get Palamedes to work at all? Make sure to mention your OS (Linux, Mac, Windows), Matlab or Octave version, and Palamedes version.

JAGS and/or Stan integration
Want to use the Bayesian fitting routines in the PAL_PFHB group of routines but you are having trouble integrating JAGS and/or Stan? Make sure to mention your OS (Linux, Mac, Windows), Matlab or Octave version and Palamedes version.

Psychometric Function Fitting, Bayesian Criterion (PAL_PFHB)

Psychometric Function Fitting, Maximum-Likelihood Criterion (PAL_PFML, PAL_PFLR)

Signal Detection Theory (PAL_SDT)

Summation Modeling (PAL_SDT)

Adaptive Measurement (PAL_AMPM, PAL_AMRF, PAL_AMUD)

Maximum-Likelihood Difference Scaling (PAL_MLDS)

Miscellaneous Functions
Functions not tied to a specific group (e.g., PAL_pdfNormal, PAL_Contrasts)

Model Choices
What do I do with the lapse rate? Should I use a Weibull or Logistic? Should I constrain the slope? What prior should I use? How do I use a model matrix to specify my model? etc.

Model Comparisons
What do these posteriors say about my effect? Is my p significant? Are my models nested? What am I looking for in a violin plot? etc.

Questions
Questions about topics in our text Psychophysics: A Practical Introduction (https://www.elsevier.com/books/psychoph ... 2-407156-8). Mention whether your post is about the first or second edition if it matters. Please remember that this is a user forum! (i.e., do not direct questions to authors as authors may not monitor this forum on a regular basis).

Suggestions
Suggestions for the third edition?

Show off your model (or results or whatever)
Show everybody what you did with the Palamedes Toolbox!

Suggestions to make this board better