Merge pull request #338 from IanEisenberg/titrate

updated discount tirate

Author: IanEisenberg

discount_titrate/config.json

@@ -26,6 +26,12 @@
         "time":10,
         "reference": "http://www.nature.com/neuro/journal/v13/n5/extref/nn.2516-S1.pdf",
         "publish":"True",
+        "experiment_variables": [{
+                                 "name":"credit_var",
+                                 "type":"credit",
+                                 "datatype": "boolean",
+                                 "description":"True if avg_rt > 200"
+                                  }],
         "deployment_variables":{"jspsych_init":
                                         {"fullscreen": true,
                                         "display_element": "getDisplayElement",

discount_titrate/experiment.js

@@ -27,6 +27,47 @@ function addID() {
 	})
 }
 
+function assessPerformance() {
+	/* Function to calculate the "credit_var", which is a boolean used to
+	credit individual experiments in expfactory. */
+	var experiment_data = jsPsych.data.getTrialsOfType('poldrack-single-stim')
+	var missed_count = 0
+	var trial_count = 0
+	var rt_array = []
+	var rt = 0
+		//record choices participants made
+	var choice_counts = {}
+	choice_counts[-1] = 0
+	for (var k = 0; k < choices.length; k++) {
+		choice_counts[choices[k]] = 0
+	}
+	for (var i = 0; i < experiment_data.length; i++) {
+		trial_count += 1
+		rt = experiment_data[i].rt
+		key = experiment_data[i].key_press
+		choice_counts[key] += 1
+		if (rt == -1) {
+			missed_count += 1
+		} else {
+			rt_array.push(rt)
+		}
+	}
+	//calculate average rt
+	var sum = 0
+	for (var j = 0; j < rt_array.length; j++) {
+		sum += rt_array[j]
+	}
+	var avg_rt = sum / rt_array.length
+		//calculate whether response distribution is okay
+	var responses_ok = true
+	Object.keys(choice_counts).forEach(function(key, index) {
+		if (choice_counts[key] > trial_count * 0.85) {
+			responses_ok = false
+		}
+	})
+	credit_var = (avg_rt > 200) && responses_ok
+}
+
 var getInstructFeedback = function() {
 	return '<div class = centerbox><p class = center-block-text>' + feedback_instruct_text +
 		'</p></div>'
@@ -83,8 +124,10 @@ var run_attention_checks = false
 var attention_check_thresh = 0.65
 var sumInstructTime = 0 //ms
 var instructTimeThresh = 0 ///in seconds
+var credit_var = true
 
 // task specific variables
+var choices = [80, 81]
 //First generate smaller amounts (mean = 20, sd = 10, clipped at 5 and 40)
 var small_amts = [];
 for (i = 0; i < 36; i++) {
@@ -178,7 +221,6 @@ var feedback_instruct_block = {
 	timing_response: 180000
 };
 /// This ensures that the subject does not read through the instructions too quickly.  If they do it too quickly, then we will go over the loop again.
-var instruction_trials = []
 var instructions_block = {
 	type: 'poldrack-instructions',
 	data: {
@@ -191,11 +233,9 @@ var instructions_block = {
 	show_clickable_nav: true,
 	timing_post_trial: 1000
 };
-instruction_trials.push(feedback_instruct_block)
-instruction_trials.push(instructions_block)
 
 var instruction_node = {
-	timeline: instruction_trials,
+	timeline: [feedback_instruct_block, instructions_block],
 	/* This function defines stopping criteria */
 	loop_function: function(data) {
 		for (var i = 0; i < data.length; i++) {
@@ -241,7 +281,7 @@ var practice_block = {
 		"<div class = centerbox id='container'><p class = center-block-text>Please select the option that you would prefer pressing <strong>'q'</strong> for left <strong>'p'</strong> for right:</p><div class='table'><div class='row'><div id = 'option'><center><font color='green'>$20.58<br>today</font></center></div><div id = 'option'><center><font color='green'>$25.93<br>2 weeks</font></center></div></div></div></div>"
 	],
 	is_html: true,
-	choices: [80, 81],
+	choices: choices,
 	response_ends_trial: true,
 	on_finish: function(data) {
 		whichKey = data.key_press
@@ -275,7 +315,7 @@ var test_block = {
 	type: 'poldrack-single-stim',
 	timeline: trials,
 	is_html: true,
-	choices: [80, 81],
+	choices: choices,
 	randomize_order: true,
 	response_ends_trial: true,
 	on_finish: function(data) {
@@ -303,7 +343,8 @@ var end_block = {
 	},
 	text: '<div class = centerbox><p class = center-block-text>Thanks for completing this task!</p><p class = center-block-text>Press <strong>enter</strong> to continue.</p></div>',
 	cont_key: [13],
-	timing_post_trial: 0
+	timing_post_trial: 0,
+	on_finish: assessPerformance
 };