Simultaneous input of a sound and a visual stimulus

Kassiopi

Hello to all!

I am designing an experiment based on stroof effect though I am going to create a cross-modal effect meaning that one group of participants will see the visual stimulus and at the same time they will hear a sound. More specifically, I will ask the participants to try to read the correct colour in incogruent stimuli (e.g. the word "red" will be written in a different color) while at the same time they will hear a beep sound every time the stimulus changes (i.e. in every appeared word).

However, I am realy stuck on how to do this. Can you help me?

Thanks in advance!

lvanderlinden

Hi @Kassiopi ,

Thanks for your interest in OpenSesame and welcome to the forum! :)

I think you could use something like the following structure. Note that OpenSesame is now waiting for a keypress after every word, so you'll have to change that to fit your protocol.

6848.osexp

There are plugins for sound recording, but they are quite old and not stable.

• https://osdoc.cogsci.nl/3.3/manual/response/soundrecording/

An alternative would be to collect keypresses for different colors, or to make the experimenter make a keypress depending on whether the participant's vocal response was correct or not.

Hope this helps!

Cheers,

Lotje

Kassiopi

Thank very much Lotje!

I will try this and I'll be back to let you know if it worked! One more question: my research has 2 conditions (one with the beep voice and one without). How can I design these two conditions in the Open Sesame (I know that the loop has to do something with this but I am very confused as to how).

Thank you again for your help!

lvanderlinden

Hi @Kassiopi ,

You can create a new column in the block_loop that indicates whether the sound should be played or not. In the screenshot below, I created the variable "play_beep", which can have the value "yes" or "no".

Next, you can use a Run-if statement in the trial_sequence item to determine whether or not to execute the sampler item (which is playing the beep).

I uploaded the modified example script.

Hope this makes sense!

Good luck!

Lotje

6848_2.osexp