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Jul 23

Greetings HDDM Community,

I have some questions about the HDDM in Go/NoGo tasks. For NoGo task, the RT should be NaN. And I

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Greetings HDDM Community,

I have some questions about the HDDM in Go/NoGo tasks. For NoGo task, the RT should be NaN. And I

Jul 23

gabriel...@gmail.com

Jul 8

Using an external measure as parameter value

Hello, I have a few neural measures as candidates for the main DDM parameters v, a and t0. My idea

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Using an external measure as parameter value

Hello, I have a few neural measures as candidates for the main DDM parameters v, a and t0. My idea

Jul 8

Pran Chanthrakumar

May 2

Setting Priors on User-Defined Regressor Coefficients

Hello! In the HDDM framework, I understand that we can set priors for the base DDM parameters (like v

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Setting Priors on User-Defined Regressor Coefficients

Hello! In the HDDM framework, I understand that we can set priors for the base DDM parameters (like v

May 2

Harrison Ritz, Renu3

Apr 15

issue with setting parameter to defaults

I can confirm that the code snippet in OP did end up working. IIRC I needed the latest version of

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issue with setting parameter to defaults

I can confirm that the code snippet in OP did end up working. IIRC I needed the latest version of

Apr 15

Jiawen, Michael J Frank3

Apr 9

Inquiry Regarding Nested Equations from HDDM Tutorial

Thank you very much, professor! We'll try it. On Wednesday, April 9, 2025 at 12:25:23 AM UTC+8

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Inquiry Regarding Nested Equations from HDDM Tutorial

Thank you very much, professor! We'll try it. On Wednesday, April 9, 2025 at 12:25:23 AM UTC+8

Apr 9

Mar 30

between-subjects analysis

I have conducted a between-subjects experiment and want to compare if there are differences between

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between-subjects analysis

I have conducted a between-subjects experiment and want to compare if there are differences between

Mar 30

Jingzhu Chen, … hcp...@gmail.com4

Mar 13

Either of the installation methods worked in my pc

Please check the latest tutorial paper of dockerHDDM: https://doi.org/10.1177/25152459241298700 the

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Either of the installation methods worked in my pc

Please check the latest tutorial paper of dockerHDDM: https://doi.org/10.1177/25152459241298700 the

Mar 13

Nour Alqarmy, Chase Mackey2

Feb 25

Modeling Single-Choice Rapid Button Press Tasks Across Conditions with HDDM

Hi, We used HDDM for a single response task (https://journals.physiology.org/doi/abs/10.1152/jn.

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Modeling Single-Choice Rapid Button Press Tasks Across Conditions with HDDM

Hi, We used HDDM for a single response task (https://journals.physiology.org/doi/abs/10.1152/jn.

Feb 25

Su Wang, Veronika Wendler2

Feb 4

Error when do "pip install hddm"

Hello Su, I could perhaps help you out with this—but from a slightly different approach. If you want

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Error when do "pip install hddm"

Hello Su, I could perhaps help you out with this—but from a slightly different approach. If you want

Feb 4

Florian Schmitz

Jan 12

parameter recovery simulation for multiple participants at a time

Hi HDDM users, I am currently dealing with model selection. As far as I know there is DIC and MSE for

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parameter recovery simulation for multiple participants at a time

Hi HDDM users, I am currently dealing with model selection. As far as I know there is DIC and MSE for

Jan 12

Bohyun Park "Gemma", Michael J Frank2

11/20/24

HDDM.StimCoding: I only get positive drift rates for both response options.

See below for stim coding - you need to use hddm.HDDMStimCoding. That way v will automatically be

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HDDM.StimCoding: I only get positive drift rates for both response options.

See below for stim coding - you need to use hddm.HDDMStimCoding. That way v will automatically be

11/20/24

11/3/24

Not sure if I published this conversation: HDDM installation error

Anyone could help? On Wednesday, October 30, 2024 at 10:39:18 PM UTC-4 Su Wang wrote: I did "!

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Not sure if I published this conversation: HDDM installation error

Anyone could help? On Wednesday, October 30, 2024 at 10:39:18 PM UTC-4 Su Wang wrote: I did "!

11/3/24

11/2/24

Inquiry on Application of DDM with Four Options Categorized into Two Groups

Dear professor， I am writing this email to inquire about the application of the Drift Diffusion Model

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Inquiry on Application of DDM with Four Options Categorized into Two Groups

Dear professor， I am writing this email to inquire about the application of the Drift Diffusion Model

11/2/24

Varg Königsmark

10/28/24

hddm in the context of a 3-AFC task

Hi Everyone, I'm fitting the model to face recognition data from the Cambridge Face Memory Test.

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hddm in the context of a 3-AFC task

Hi Everyone, I'm fitting the model to face recognition data from the Cambridge Face Memory Test.

10/28/24

9/18/24

Wheel build failure installing on Mac M2

Alternatively, trying to build inside a conda environment, I get a different dependency-related error

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Wheel build failure installing on Mac M2

Alternatively, trying to build inside a conda environment, I get a different dependency-related error

9/18/24

Olivier Savrimoutoo, Liu2

8/22/24

[Gelman-Rubin] - Invidual vs group

Hi, being able to estimate subject parameters, not treating every subject as an average subject (

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[Gelman-Rubin] - Invidual vs group

Hi, being able to estimate subject parameters, not treating every subject as an average subject (

8/22/24

7/20/24

Questions about HDDMRegression with drift_criterion

Hi all, I tried to search in the HDDM help doc but couldn't find much information, therefore I

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Questions about HDDMRegression with drift_criterion

Hi all, I tried to search in the HDDM help doc but couldn't find much information, therefore I

7/20/24

7/6/24

Issues with model saving and post_pred_gen

Update : Saving my model in docker is not an issue anymore, Once I have "ppc_data = hddm.utils.

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Issues with model saving and post_pred_gen

Update : Saving my model in docker is not an issue anymore, Once I have "ppc_data = hddm.utils.

7/6/24

Ben Jonathan Wagner, Michael J Frank3

6/17/24

Collapsing bounds in HSSM; task structure

Hi Michael and Krishn, thank you very much, that sounds great. i will do that. Bests, Ben On Sun, 16

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Collapsing bounds in HSSM; task structure

Hi Michael and Krishn, thank you very much, that sounds great. i will do that. Bests, Ben On Sun, 16

6/17/24

zonghuan yu, Michael J Frank3

6/14/24

Inquiry about Using HDDM for Decision-Making Task Analysis

Dear Dr. Frank, Thank you for your suggestions. I agree with your assessment. Although I attempted to

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Inquiry about Using HDDM for Decision-Making Task Analysis

Dear Dr. Frank, Thank you for your suggestions. I agree with your assessment. Although I attempted to

6/14/24

Thomas Wiecki, … Irene Dolfini23

5/21/24

Installation instructions for OSX

Hello! I'm trying to install hddm on a mac M1, macOS 13.0.1. Since I'm quite new in this

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Installation instructions for OSX

Hello! I'm trying to install hddm on a mac M1, macOS 13.0.1. Since I'm quite new in this

5/21/24

5/18/24

hddm installation on mac

Hello! I'm trying to install hddm on a mac M1, macOS 13.0.1. Since I'm quite new in this

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hddm installation on mac

Hello! I'm trying to install hddm on a mac M1, macOS 13.0.1. Since I'm quite new in this

5/18/24

Michael J Frank, Chase Mackey2

5/3/24

Re: [hddm-users] Is it logical to use changes in drift rate to model duration-dependent changes in performance?

This is a really helpful explanation. Thank you Michael. I also found this paper by Ratcliff, which

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Re: [hddm-users] Is it logical to use changes in drift rate to model duration-dependent changes in performance?

This is a really helpful explanation. Thank you Michael. I also found this paper by Ratcliff, which

5/3/24

4/4/24

split_by value for only one condition

Hi, The tutorial says "split_by" value can specify the different conditions. So should the

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split_by value for only one condition

Hi, The tutorial says "split_by" value can specify the different conditions. So should the

4/4/24

3/26/24

Problem with post_pred_gen

Dear all, we conducted a study assessing sequential choice biases. Currently we are fitting 3

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Problem with post_pred_gen

Dear all, we conducted a study assessing sequential choice biases. Currently we are fitting 3

3/26/24

3/20/24

Seeking for suggestion on HDDM for PRT task

Dear all, We conducted a study using PRT task (Bogdan&Pizzagalli, 2006) , which invetigates the

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Seeking for suggestion on HDDM for PRT task

Dear all, We conducted a study using PRT task (Bogdan&Pizzagalli, 2006) , which invetigates the

3/20/24

Linda Fiorini, … Katie Alonso3

3/15/24

Question: Go/No go

Hi Linda and Edoardo, I'm having a similar issue with coding the Go/No-Go rt for the trials with

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Question: Go/No go

Hi Linda and Edoardo, I'm having a similar issue with coding the Go/No-Go rt for the trials with

3/15/24

3/15/24

Hello! I am new here and I am new as well in neuroscience. I am trying to install this package in my

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Hello! I am new here and I am new as well in neuroscience. I am trying to install this package in my

3/15/24

3/7/24

Modeling Single-Choice Rapid Button Press Tasks Across Conditions with HDDM

Hello HDDM Community, I am working on a study involving a rapid button press task where participants

unread,

Modeling Single-Choice Rapid Button Press Tasks Across Conditions with HDDM

Hello HDDM Community, I am working on a study involving a rapid button press task where participants

3/7/24

Camilla Eva Andersen, Michael J Frank4

2/26/24

Question: is non-decision time estimated in relation to the fastest RT in the data set or the fastest RT for each participant?

with that regression you are estimating a separate nondecision time parameter for each condition so

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Question: is non-decision time estimated in relation to the fastest RT in the data set or the fastest RT for each participant?

with that regression you are estimating a separate nondecision time parameter for each condition so

2/26/24

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