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synced 2025-05-11 16:18:11 +00:00
blindspot measurement optional
This commit is contained in:
Peter J. Kohler
parent
1f813bc9f3
commit
1555a9e718
@ -1,6 +1,9 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
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<meta content="utf-8" http-equiv="encoding">
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<!-- jQuery -->
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
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<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js" integrity="sha256-VazP97ZCwtekAsvgPBSUwPFKdrwD3unUfSGVYrahUqU=" crossorigin="anonymous"></script>
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@ -21,16 +24,46 @@
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<script>
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let trial = {
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// measure px2mm, viewing distance and px2deg
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// do not resize
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// note: pixels_per_unit will be ignored
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let no_resize = {
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type: 'virtual-chinrest',
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blindspot_reps: 3,
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resize_units: "cm",
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pixels_per_unit: 50,
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resize_allowed: false
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resize_units: "none",
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pixels_per_unit: 50
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};
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// measure px2mm, but not viewing distance and px2deg
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// resize to cm (50 pixels per unit)
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// note, you may still choose to estimate viewing distance even if resizing to cm or inches
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let cm_resize = {
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type: 'virtual-chinrest',
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blindspot_reps: 0,
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resize_units: "cm",
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pixels_per_unit: 50
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};
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// measure px2mm, viewing distance and px2deg
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// resize to degrees of visual angle (50 pixels per unit)
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let deg_resize = {
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type: 'virtual-chinrest',
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blindspot_reps: 3,
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resize_units: "deg",
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pixels_per_unit: 50
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};
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// resizing to degrees with no blindspot measurment is not possible
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// this trial will throw an error
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let error_trial = {
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type: 'virtual-chinrest',
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blindspot_reps: 0,
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resize_units: "deg",
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pixels_per_unit: 50
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}
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jsPsych.init({
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timeline: [trial],
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timeline: [ deg_resize ],
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on_finish: function() { jsPsych.data.displayData(); }
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});
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@ -33,16 +33,11 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
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default: 100,
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description: 'After the scaling factor is applied, this many pixels will equal one unit of measurement.'
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},
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resize_allowed: {
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type: jsPsych.plugins.parameterType.BOOL,
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default: false,
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description: 'If true, the resize of the screen will be done.'
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},
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blindspot_reps: {
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type: jsPsych.plugins.parameterType.INT,
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pretty_name: 'Blindspot measurement repetitions',
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default: 5,
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description: 'How many times to measure the blindspot location'
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description: 'How many times to measure the blindspot location? If 0, blindspot will not detected and viewing distance not computed.'
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},
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prompt_card: {
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type: jsPsych.plugins.parameterType.STRING,
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@ -68,7 +63,6 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
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'<li>Click the button below to start the animation of the red ball. The <b style="color: red">red ball </b>'+
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'will disappear as it moves from right to left. Press the “Space” key as soon as the ball disappears from your eye sight.</li>'+
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'</div><br>'
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},
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card_path: {
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type: jsPsych.plugins.parameterType.STRING,
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@ -76,8 +70,6 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
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}
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}
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}
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// Get screen size
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var w = window.innerWidth;
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@ -90,7 +82,6 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
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let trial_data = {
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"card_width_mm": 85.60, //card dimension: 85.60 × 53.98 mm (3.370 × 2.125 in)
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};
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let config_data = {
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@ -100,91 +91,101 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
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plugin.trial = function(display_element, trial) {
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const start_time = performance.now();
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try {
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if ( !( trial.blindspot_reps > 0 ) && ( (trial.resize_units == "deg" ) || (trial.resize_units == "degrees" ) ) ) {
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throw Error("Blindspot repetitions set to 0, so resizing to degrees of visual angle is not possible!")
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} else {
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const start_time = performance.now();
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console.log(trial)
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if ( trial.blindspot_reps > 0 ) {
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button_str = '<button id=blind_spot class="btn btn-primary">'
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} else {
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button_str = '<button id=proceed class="btn btn-primary">'
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}
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pagesize_content =
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'<div id="page-size"><br><br>'+
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trial.prompt_card +
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'<div id="container">'+
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'<div id="slider"></div><br>'+
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'<img id="card" src="' + trial.card_path + '" style="width: 50%">'+
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'<br><br><button id=blind_spot class="btn btn-primary">Click here when you are done!</button>'+
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'</div>'+
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'</div>'
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pagesize_content =
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'<div id="page-size"><br><br>'+
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trial.prompt_card +
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'<div id="container">'+
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'<div id="slider"></div><br>'+
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'<img id="card" src="' + trial.card_path + '" style="width: 50%">'+
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'<br><br>' + button_str + 'Click here when you are done!</button>'+
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'</div>'+
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'</div>'
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blindspot_content =
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'<div id="blind-spot" style="visibility: hidden">' +
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trial.prompt_blindspot +
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'<p>Please do it <b>' + trial.blindspot_reps + '</b> times. Keep your right eye closed and hit the “Space” key fast!</p><br>' +
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'<div id="svgDiv" style="width:1000px;height:200px;"></div>'+
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'<button class="btn btn-primary" id="start_ball">Start</button>'+
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'<button class="btn btn-primary" id="proceed" style="display:none">Proceed</button><br>'+
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'<b>Hit space <div id="click" style="display:inline; color: red">' + trial.blindspot_reps + '</div> more times!<b><br>'+
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'<div id="info" style="visibility:hidden">'+
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'<b id="info-h">Estimated viewing distance (cm): </b>'+
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'</div>'+
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'</div>'
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display_element.innerHTML =
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'<div id="content" style="width: 900px; margin: 0 auto;">'+
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pagesize_content +
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blindspot_content +
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'</div>'
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blindspot_content =
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'<div id="blind-spot" style="visibility: hidden">' +
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trial.prompt_blindspot +
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'<p>Please do it <b>' + trial.blindspot_reps + '</b> times. Keep your right eye closed and hit the “Space” key fast!</p><br>' +
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'<div id="svgDiv" style="width:1000px;height:200px;"></div>'+
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'<button class="btn btn-primary" id="start_ball">Start</button>'+
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'<button class="btn btn-primary" id="proceed" style="display:none">Proceed</button><br>'+
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'<b>Hit space <div id="click" style="display:inline; color: red">' + trial.blindspot_reps + '</div> more times!<b><br>'+
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'<div id="info" style="visibility:hidden">'+
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'<b id="info-h">Estimated viewing distance (cm): </b>'+
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'</div>'+
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'</div>'
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display_element.innerHTML =
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'<div id="content" style="width: 900px; margin: 0 auto;">'+
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pagesize_content +
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blindspot_content +
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'</div>'
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/*// create html for display
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var html = "<body><div id='content'><div id='page-size'><br><br><br><br><br><br>";
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// html += "<h3> Let’s find out what your monitor size is (click to go into <div onclick='fullScreen(); registerClick();' style='display:inline; cursor:pointer; color: red'><em><u>full screen mode</u></em></div>).</h2>";
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html += "<p>Please use any credit card that you have available (it can also be a grocery store membership card, your drivers license, or anything that is of the same format), hold it onto the screen, and adjust the slider below to its size.</p>";
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html += "<p>(If you don't have access to a real card, you can use a ruler to measure image width to 3.37inch or 85.6mm, or make your best guess!)</p>";
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html += "<b style='font-style: italic'>Make sure you put the card onto your screen.</b>";
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html += '<br><div id="container">';
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html += "<div id='slider'></div>";
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html += '<br> <img id="card" src="img/card.png" style="width: 50%"><br><br>';
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html +='<button id="btnBlindSpot" class="btn btn-primary">Click here when you are done!</button></div></div>';
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/*// create html for display
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var html = "<body><div id='content'><div id='page-size'><br><br><br><br><br><br>";
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// html += "<h3> Let’s find out what your monitor size is (click to go into <div onclick='fullScreen(); registerClick();' style='display:inline; cursor:pointer; color: red'><em><u>full screen mode</u></em></div>).</h2>";
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html += "<p>Please use any credit card that you have available (it can also be a grocery store membership card, your drivers license, or anything that is of the same format), hold it onto the screen, and adjust the slider below to its size.</p>";
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html += "<p>(If you don't have access to a real card, you can use a ruler to measure image width to 3.37inch or 85.6mm, or make your best guess!)</p>";
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html += "<b style='font-style: italic'>Make sure you put the card onto your screen.</b>";
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html += '<br><div id="container">';
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html += "<div id='slider'></div>";
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html += '<br> <img id="card" src="img/card.png" style="width: 50%"><br><br>';
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html +='<button id="btnBlindSpot" class="btn btn-primary">Click here when you are done!</button></div></div>';
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html += '<div id="blind-spot" style="visibility: hidden">';
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html += '<!-- <h2 class="bolded-blue">Task 2: Where’s your blind spot?</h2> -->';
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html += "<h3>Now, let's quickly test how far away you are sitting.</h3>";
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html += "<p>You might know that vision tests at a doctor's practice often involve chinrests; the doctor basically asks you to sit away from a screen in a specific distance. We do this here with a 'virtual chinrest'.</p>";
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html += '<h3>Instructions</h3>';
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html += '<p>1. Put your finger on <b>space bar</b> on the keyboard.</p>';
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html += '<p>2. Close your right eye. <em>(Tips: it might be easier to cover your right eye by hand!)</em></p>';
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html += '<p>3. Using your left eye, focus on the black square.</p>';
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html += '<p>4. Click the button below to start the animation of the red ball. The <b style="color: red">red ball</b> will disappear as it moves from right to left. Press the Space key as soon as the ball disappears from your eye sight.</p><br>';
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html += '<p>Please do it <b>five</b> times. Keep your right eye closed and hit the Space key fast!</p><br>';
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html += '<button class="btn btn-primary" id="start" ">Start</button>';
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html += '<div id="blind-spot" style="visibility: hidden">';
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html += '<!-- <h2 class="bolded-blue">Task 2: Where’s your blind spot?</h2> -->';
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html += "<h3>Now, let's quickly test how far away you are sitting.</h3>";
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html += "<p>You might know that vision tests at a doctor's practice often involve chinrests; the doctor basically asks you to sit away from a screen in a specific distance. We do this here with a 'virtual chinrest'.</p>";
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html += '<h3>Instructions</h3>';
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html += '<p>1. Put your finger on <b>space bar</b> on the keyboard.</p>';
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html += '<p>2. Close your right eye. <em>(Tips: it might be easier to cover your right eye by hand!)</em></p>';
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html += '<p>3. Using your left eye, focus on the black square.</p>';
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html += '<p>4. Click the button below to start the animation of the red ball. The <b style="color: red">red ball</b> will disappear as it moves from right to left. Press the Space key as soon as the ball disappears from your eye sight.</p><br>';
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html += '<p>Please do it <b>five</b> times. Keep your right eye closed and hit the Space key fast!</p><br>';
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html += '<button class="btn btn-primary" id="start" ">Start</button>';
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html += '<div id="svgDiv" style="width:1000px;height:200px;"></div>';
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html += "Hit 'space' <div id='click' style='display:inline; color: red; font-weight: bold'>5</div> more times!</div>";
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html += '<div id="svgDiv" style="width:1000px;height:200px;"></div>';
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html += "Hit 'space' <div id='click' style='display:inline; color: red; font-weight: bold'>5</div> more times!</div>";
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// render
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display_element.innerHTML = html; */
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//Event listeners for buttons
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// render
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display_element.innerHTML = html; */
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//Event listeners for buttons
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if ( trial.blindspot_reps > 0 ) {
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display_element.querySelector('#blind_spot').addEventListener('click', function(){
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configureBlindSpot()
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})
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display_element.querySelector('#start_ball').addEventListener('click', function(){
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animateBall()
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})
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} else {
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// run the two relevant functions to get card_width_mm and px2mm
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distanceSetup.px2mm(getCardWidth())
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}
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display_element.querySelector('#blind_spot').addEventListener('click', function(){
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configureBlindSpot()
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})
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display_element.querySelector('#start_ball').addEventListener('click', function(){
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animateBall()
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})
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if (trial.resize_allowed === true){
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display_element.querySelector('#proceed').addEventListener('click', function(){
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// finish trial
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trial_data.rt = performance.now() - start_time;
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display_element.innerHTML = '';
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trial_data.card_width_deg = 2*(Math.atan((trial_data["card_width_mm"]/2)/trial_data["view_dist_mm"])) * 180/Math.PI
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trial_data.px2deg = trial_data["card_width_px"] / trial_data.card_width_deg // size of card in pixels divided by size of card in degrees of visual angle
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trial_data.rt = performance.now() - start_time;
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let px2unit_scr = 0
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switch (trial.resize_units) {
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case "cm":
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@ -203,35 +204,41 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
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if (px2unit_scr > 0) {
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// scale the window
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scale_factor = px2unit_scr / trial.pixels_per_unit;
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console.log(scale_factor, trial_data)
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document.getElementById("jspsych-content").style.transform = "scale(" + scale_factor + ")";
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// pixels have been scaled, so pixels per degree, pixels per mm and pixels per card_width needs to be updated
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trial_data.px2deg = trial_data.px2deg / scale_factor
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trial_data.px2mm = trial_data.px2mm / scale_factor
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trial_data.card_width_px = trial_data.card_width_px / scale_factor
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trial_data.scale_factor = scale_factor
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}
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if ( trial.blindspot_reps > 0 ) {
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trial_data.win_width_deg = window.innerWidth/trial_data.px2deg
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trial_data.win_height_deg = window.innerHeight/trial_data.px2deg
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} else {
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// delete degree related properties
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delete trial_data.px2deg
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delete trial_data.card_width_deg
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}
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trial_data.win_width_deg = window.innerWidth/trial_data.px2deg
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trial_data.win_height_deg = window.innerHeight/trial_data.px2deg
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jsPsych.finishTrial(trial_data);
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jsPsych.pluginAPI.cancelAllKeyboardResponses();
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})
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} else{
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display_element.querySelector('#proceed').addEventListener('click', function(){
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end_trial()
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})
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/*
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jsPsych.pluginAPI.getKeyboardResponse({
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callback_function: after_response, // we need to create after_response
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valid_responses: [trial.key], // valid_responses expects an array
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rt_method: 'performance', // This is only relevant for RT in audio stimuli
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persist: false, // true if you want to listen to more than one key
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allow_held_key: true // false for a new key pressing in order to get a new response
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});
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*/
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}
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} catch (e) {
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console.error(e)
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}
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/*
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jsPsych.pluginAPI.getKeyboardResponse({
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callback_function: after_response, // we need to create after_response
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valid_responses: [trial.key], // valid_responses expects an array
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rt_method: 'performance', // This is only relevant for RT in audio stimuli
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persist: false, // true if you want to listen to more than one key
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allow_held_key: true // false for a new key pressing in order to get a new response
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});
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*/
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}
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function after_response(response_info){
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