Fmri utils

static/css/default_style.css

@@ -82,6 +82,7 @@ body {
 .center-text {
   text-align:center;
   font-size: 60px;
+  line-height: 80px;
   position: relative;
   top: 50%;
   -ms-transform: translateY(-50%);

static/js/utils/poldrack_fmri_utils.js

@@ -0,0 +1,124 @@
+/* ************************************ */
+/* Setup fMRI trigger listener and functions */
+/* ************************************ */
+var trigger_times = []
+
+document.onkeypress = function(evt) {
+	evt = evt || window.event;
+	var charCode = evt.keyCode || evt.which; 
+	var which_key = String.fromCharCode(charCode);
+	if (which_key == 't') {
+		time = jsPsych.totalTime().toString();
+		trigger_times.push(time)
+	} else {
+		time = jsPsych.totalTime().toString();
+		if (which_key == ' ') {
+			which_key = 'space'
+		}
+		console.log(which_key, time)
+	}
+}
+
+var clear_triggers = function() {
+	trigger_times = []
+}
+
+function addID(exp_id) {
+	jsPsych.data.addDataToLastTrial({
+		exp_id: exp_id,
+		trigger_times: trigger_times
+	})
+	clear_triggers()
+}
+
+
+/* ************************************ */
+/* default jsPsych fMRI blocks */
+/* ************************************ */
+
+var fmri_scanner_wait_block = {
+	type: 'poldrack-text',
+	text: "<div class = centerbox><div style = 'font-size: 50px', class = center-text>Test run will start after scanner calibration</p></div>",
+	cont_key: [32],
+	data: {
+		trial_id: "fmri_scanner_wait"
+	},
+	timing_response: -1,
+	timing_post_trial: 0
+};
+
+// blank block to put after the last ignored trigger as a buffer before experiment
+var fmri_buffer_block = {
+	type: 'poldrack-single-stim',
+	stimulus: '',
+	is_html: true,
+	choices: 'none',
+	timing_stim: 1000, 
+	timing_response: 1000,
+	data: {
+		trial_id: "fmri_buffer"
+	},
+	timing_post_trial: 0
+};
+
+// block to wait for triggers
+var create_trigger_block = function(trigger) {
+	var fMRI_wait_block = {
+		type: 'poldrack-text',
+		text: "<div class = centerbox><div  class = center-text>Scanner calibration<br><strong>Please don't move!</strong></p></div>",
+		cont_key: [trigger],
+		data: {
+			trial_id: "fmri_trigger_wait"
+		},
+		timing_response: -1,
+		timing_post_trial: 0
+	};
+	return fMRI_wait_block
+}
+
+var get_finger = function (choice) {
+	var keycode_lookup = {'B': 'thumb', 'Y': 'index', 'G': 'middle', 
+					'R': 'ring', 'M': 'pinky'}
+	var finger = keycode_lookup[String.fromCharCode(choice)]
+	return finger
+}
+
+// test response keys
+var create_key_test_block = function(choice) {
+	var button = get_finger(choice)
+	var instruct_text = "Please press your " + button + " finger"
+	if (button == null) {
+		instruct_text = "Wait for instructions from the experimenter."
+	}
+	var key_test_block = {
+		type: 'poldrack-text',
+		text: "<div class = centerbox><div style = 'font-size: 50px' class = center-text>" + instruct_text + "</p></div>",
+		cont_key: [choice],
+		data: {
+			trial_id: "fmri_response_test"
+		},
+		timing_response: -1,
+		timing_post_trial: 500
+	};
+	return key_test_block
+}
+
+// setup function
+var setup_fmri_intro = function(lst, choices = [], num_ignore = 16, trigger = 84) {
+	for (var i=0; i < choices.length; i++) {
+		lst.push(create_key_test_block(choices[i]))
+	}
+	lst.push(fmri_scanner_wait_block)
+	for (var j = 0; j < num_ignore; j++) {
+		lst.push(create_trigger_block(trigger))
+	}
+	lst.push(fmri_buffer_block)
+}
+
+// setup function
+var setup_fmri_run = function(lst, num_ignore = 16, trigger = 84) {
+	for (var j = 0; j < num_ignore; j++) {
+		lst.push(create_trigger_block(trigger))
+	}
+	lst.push(fmri_buffer_block)
+}