depending on number of button presses, different stim

[Student-coding1]

Hi,

I am struggling with my code, I would like that if the participants presses the button A twice within 1500ms, it would show stim_g, if the participant only pressed the button A once within 1500ms it needs to show stim_1. But I seem to do something wrong in the coding.

Does anybody have any advice pleas?

Thanks in advances!

var stim = {
type: 'html-keyboard-response',
stimulus: "stim",
choices:['z'],
}
timeline.push(stim)

var stim_g = {
type: 'html-keyboard-response',
stimulus: "stim longer than 1500ms",
choices:['z'],
on_finish: function(data){
jsPsych.data.addProperties({
reaction_time: data.rt,
})
}
};

var stimulus_longer = {
timeline: [stim_g],
conditional_function: function(){
var last_trial_data = jsPsych.data.getLastTrialData();
var data = jsPsych.data.get().last(1).values()[0];
while (data.rt < 1500) {
if(jsPsych.data.get().last(2).count() == 2){
return false
} else{
return true
}
}
}
};

timeline.push(stimulus_longer)

var stim_1 = {
type: 'html-keyboard-response',
stimulus: "stim shorter than 1500ms",
choices:['z'],
};

var stimulus_shorter = {
timeline: [stim_1],
conditional_function: function(){
var last_trial_data = jsPsych.data.getLastTrialData();
var data = jsPsych.data.get().last(1).values()[0];
while (data.rt > 1500) {
return false
} else{
return true
}
}
};

timeline.push(stimulus_shorter)

[Shaobin-Jiang]

let stim = {
    type: jsPsychHtmlKeyboardResponse,
    stimulus: 'stim',
    choices: ['z'],
};
timeline.push(stim);

let optional_stim = {
    timeline: [
        {
            type: jsPsychHtmlKeyboardResponse,
            stimulus: 'stim',
            choices: ['z'],
            trial_duration: () => 1500 - jsPsych.data.getLastTrialData().values()[0].rt,
        },
    ],
    conditional_function: function () {
        return jsPsych.data.getLastTrialData().values()[0].rt < 1500;
    },
};
timeline.push(optional_stim);

let stim_g = {
    type: jsPsychHtmlKeyboardResponse,
    stimulus: 'stim longer than 1500ms',
    choices: ['z'],
    on_finish: function (data) {
        jsPsych.data.addProperties({
            reaction_time: data.rt,
        });
    },
};

let stimulus_longer = {
    timeline: [stim_g],
    conditional_function: function () {
        let last_trial_data = jsPsych.data.getLastTrialData().values()[0];
        let rt = last_trial_data.rt;
        let response = last_trial_data.response;

        // rt < 1500 indicates that optional_stim must be run
        // response != null indicates that two key presses are made
        return rt < 1500 && response != null;
    },
};
timeline.push(stimulus_longer);

let stim_1 = {
    type: jsPsychHtmlKeyboardResponse,
    stimulus: 'stim shorter than 1500ms',
    choices: ['z'],
};

let stimulus_shorter = {
    timeline: [stim_1],
    conditional_function: function () {
        let last_trial_data = jsPsych.data.getLastTrialData().values()[0];
        let rt = last_trial_data.rt;
        let response = last_trial_data.response;

        return !(rt < 1500 && response != null);
    },
};
timeline.push(stimulus_shorter);