Use function() to set the parameter of an object about jspsych-psychophysics HOT 4 CLOSED

height: function() {return 1000;},

I solved this way:

            on_start: function(){
              jsPsych.currentTrial().stimuli[0].height=1000;
            }

But I don't know why stim_array is Undefined. Despite the fact that with console.log( jsPsych.currentTrial()) I can see it.

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Thank you for your valuable comments.

Now, I changed the jspsych-psychphysics code to work with a function which is specified as a parameter of a stimulus object.

Please download the latest file from the top page of this github repository. (Please be careful not to download from the release page)

Then, strictly speaking, jsPsych.currentTrial().stimuli is not the same as the jsPsych.currentTrial().stim_array. You should use jsPsych.currentTrial().stim_array.

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I know but the problem is that the same exact code with stim_array instead of stimuli doesn't work. :) The error reported is that stim_array is undefined.
This is because my code is inside on_start: function() . Inside on_load: function() stim_array exist.

from jspsych-psychophysics.

Thank you for your reply. Now, I understood what you mean.
As you said, the stim_array had not been made when the on_start function was called.
Please use the latest code using which you can write as follows:

height: function() {return 1000;},

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