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Dear LIONESS Lab users,

Welcome to this web forum. Here we aim to discuss issues arising while developing, testing and running LIONESS experiments. We also welcome suggestions for improvement of aspects of the online platform. The LIONESS Lab Development Team (Marcus Giamattei, Lucas Molleman, Kyanoush Seyed Yahosseini and José Guinot Saporta) will regularly check this forum and help out where possible.

Best regards,

Marcus and Lucas

0 selected

Pozzi Mélinda, in...@lioness-lab.org3

6/27/20

Computerized chat

Hi Lucas, Thank you very much for your answer! I will import the new version of the experiment "

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Computerized chat

Hi Lucas, Thank you very much for your answer! I will import the new version of the experiment "

6/27/20

Jun 30

Performance & API suggestions for large‑scale (100 + participant) experiments

New batchGetValues.php, which can also handle complex requests like: var {treatment, choice, History,

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Performance & API suggestions for large‑scale (100 + participant) experiments

New batchGetValues.php, which can also handle complex requests like: var {treatment, choice, History,

Jun 30

Donato Pierno, in...@lioness-lab.org2

May 28

Blind console with 7 player for group

Hi Donato, I am not sure what you mean by “experimental phases”. Do you mean that the control panel

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Blind console with 7 player for group

Hi Donato, I am not sure what you mean by “experimental phases”. Do you mean that the control panel

May 28

Christina Brunner, … Lucas Molleman7

May 23

Problem with connection / data saving

Hi Lucas, Good news!! It wasn't the manipulation of the core table (I tried commenting that part

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Problem with connection / data saving

Hi Lucas, Good news!! It wasn't the manipulation of the core table (I tried commenting that part

May 23

Christina Brunner, … Marcus Giamattei - LIONESS Development team5

May 19

Data privacy: IP adress and location in core table

Dear Marcus, dear Lucas, I'm still in the pilot / debugging phase, but I'll test your

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Data privacy: IP adress and location in core table

Dear Marcus, dear Lucas, I'm still in the pilot / debugging phase, but I'll test your

May 19

Thomas Schilling, … in...@lioness-lab.org7

May 19

Participants complain they must log in and cannot participate

Oh this is a great idea and tip! Thank you so much, Lucas. I will adjust the messages accordingly! :)

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Participants complain they must log in and cannot participate

Oh this is a great idea and tip! Thank you so much, Lucas. I will adjust the messages accordingly! :)

May 19

Apr 10

Hi LIONESS team, I will be faster and shorter. I am using the default slider object in my stage, and

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Hi LIONESS team, I will be faster and shorter. I am using the default slider object in my stage, and

Apr 10

Karl Schuhmacher, in...@lioness-lab.org7

Mar 24

Bargaining Game

Lucas, I have a much better understanding now of your statement that "it's easy to derail

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Bargaining Game

Lucas, I have a much better understanding now of your statement that "it's easy to derail

Mar 24

Donato Pierno, in...@lioness-lab.org2

Mar 13

random scenarios within groups should not change

Hi Donato, You could use the groupNr to set a “seed” for the JavaScript random number generation. See

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random scenarios within groups should not change

Hi Donato, You could use the groupNr to set a “seed” for the JavaScript random number generation. See

Mar 13

Ankita Acharya, in...@lioness-lab.org2

Mar 3

Code runs properly for 1 group but fails to save decisions for subsequent groups

Hi Ankita, I believe your code requires also specifying the groupNr to the value of the participants

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Code runs properly for 1 group but fails to save decisions for subsequent groups

Hi Ankita, I believe your code requires also specifying the groupNr to the value of the participants

Mar 3

Ankita Acharya, in...@lioness-lab.org2

Mar 3

Code runs well in first round but fails to "wait for others" after first round

Hi Ankita, The “wait for others” option in a button will wait for all participants in a group to make

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Code runs well in first round but fails to "wait for others" after first round

Hi Ankita, The “wait for others” option in a button will wait for all participants in a group to make

Mar 3

Ankita Acharya, in...@lioness-lab.org2

Feb 27

Unexpected token error for arrays

Hi Ankita, Arrays need to be processed by JS before they can be recorded in the database. One simple

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Unexpected token error for arrays

Hi Ankita, Arrays need to be processed by JS before they can be recorded in the database. One simple

Feb 27

Bret Sheeley, Lucas Molleman5

Feb 12

Timer for multiple stages

Thank you, Lucas. I appreciate your advice. This is very helpful. On Wednesday, February 12, 2025 at

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Timer for multiple stages

Thank you, Lucas. I appreciate your advice. This is very helpful. On Wednesday, February 12, 2025 at

Feb 12

Isabel Ford, … in...@lioness-lab.org5

12/10/24

Trying to call data but get "array" instead of correct data

Thank you for your help. Got it working the way I needed. Have a great week and a Merry Christmas.

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Trying to call data but get "array" instead of correct data

Thank you for your help. Got it working the way I needed. Have a great week and a Merry Christmas.

12/10/24

Paul Vanags, Lucas Molleman2

11/27/24

Hi Paul, This might happen when the server is overloaded with getValue() and/or setValue() requests.

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Hi Paul, This might happen when the server is overloaded with getValue() and/or setValue() requests.

11/27/24

Paul Vanags, in...@lioness-lab.org2

11/15/24

Formatting countdown timer

Hi Paul, You could define a timer yourself with a bit of HTML and JavaScript and use the (hack)

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Formatting countdown timer

Hi Paul, You could define a timer yourself with a bit of HTML and JavaScript and use the (hack)

11/15/24

9/9/24

multiple answers with a fixed sum (probabilties that sum up to 100%)

Dear LIONESS team, I'd like to know what would be the best way to collect multiple answers with a

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multiple answers with a fixed sum (probabilties that sum up to 100%)

Dear LIONESS team, I'd like to know what would be the best way to collect multiple answers with a

9/9/24

9/8/24

Drawing a random number for the whole group

Hi there, I'm wondering how to draw a random number for the whole group. In one part of my

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Drawing a random number for the whole group

Hi there, I'm wondering how to draw a random number for the whole group. In one part of my

9/8/24

Philipp Schreck2

9/2/24

dynamic variable creation in decisions table

Thanks for your quick response, Lucas! For some reason, it does not appear here, so I'll copy and

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dynamic variable creation in decisions table

Thanks for your quick response, Lucas! For some reason, it does not appear here, so I'll copy and

9/2/24

Thomas Schilling, Lucas Molleman7

8/28/24

getValue() function broken?

Thank you LIONESS team! The bug seems to have been related to the fact that I used "condition

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getValue() function broken?

Thank you LIONESS team! The bug seems to have been related to the fact that I used "condition

8/28/24

7/19/24

Restore Deleted Experiments

Is there anyway to restore the deleted experiments? I really need to get them back for my study. I

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Restore Deleted Experiments

Is there anyway to restore the deleted experiments? I really need to get them back for my study. I

7/19/24

Mohammad Mujahid Khan

7/17/24

Button that should land in the same stage

Dear Lioness Team, I am Mohd Mujahid Khan, working on an experiment named "Recourse." In

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Button that should land in the same stage

Dear Lioness Team, I am Mohd Mujahid Khan, working on an experiment named "Recourse." In

7/17/24

Thomas Schilling, Lucas Molleman6

7/15/24

Bugs and weird LIONESS behavior

Would someone from the LIONESS team please help me here? Cheers Thomas On Thursday, June 27, 2024 at

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Bugs and weird LIONESS behavior

Would someone from the LIONESS team please help me here? Cheers Thomas On Thursday, June 27, 2024 at

7/15/24

7/11/24

Interaction game with different displays

Hi all, We are setting up an experiment with a dyadic interaction task. In the task, two players

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Interaction game with different displays

Hi all, We are setting up an experiment with a dyadic interaction task. In the task, two players

7/11/24

Paul Vanags, … Maxwell Uphoff6

7/8/24

Duplicate experiments - leaving stages out?

For anyone who encounters this in the future-- moving the last stage that is copied over (so in my

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Duplicate experiments - leaving stages out?

For anyone who encounters this in the future-- moving the last stage that is copied over (so in my

7/8/24

6/17/24

"Terminate Player" button accidentally terminates unintended player (can't edit PlayerNr field)

Hi, I want to report a bug I encountered. Steps to reproduce & current behavior: Suppose I have

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"Terminate Player" button accidentally terminates unintended player (can't edit PlayerNr field)

Hi, I want to report a bug I encountered. Steps to reproduce & current behavior: Suppose I have

6/17/24

Anthony Van Wagoner, … in...@lioness-lab.org4

5/20/24

Connection Error When Testing Experiment

Hi Anthony, Is this the case across browsers? Say if you try it in Firefox and Chrome, does it happen

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Connection Error When Testing Experiment

Hi Anthony, Is this the case across browsers? Say if you try it in Firefox and Chrome, does it happen

5/20/24

Tony Hua, … in...@lioness-lab.org5

5/14/24

Cannot access countdown timer via JS

Hi Dan, Up top in LIONESS Lab there's a button with 'additional css'. There you can write

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Cannot access countdown timer via JS

Hi Dan, Up top in LIONESS Lab there's a button with 'additional css'. There you can write

5/14/24

Moumita Deb, Marcus Giamattei - LIONESS Development team2

4/16/24

Help with login

Please email your request to cla...@uni-passau.de as they are also taking care of the LIONESS

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Help with login

Please email your request to cla...@uni-passau.de as they are also taking care of the LIONESS

4/16/24

4/11/24

Recording live webcam interactions & loading surveys form other providers

Hello, is it possible to record live webcam interactions of (eg, three or four) participants in

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Recording live webcam interactions & loading surveys form other providers

Hello, is it possible to record live webcam interactions of (eg, three or four) participants in

4/11/24

3/28/24

Page timeouts not working in some cases?

Hi I am running a multi-player live experiment over 100 trials and to keep the pace up I have set a

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Page timeouts not working in some cases?

Hi I am running a multi-player live experiment over 100 trials and to keep the pace up I have set a

3/28/24

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