diff --git a/index.js b/index.js
index 2f6d351..991774e 100644
--- a/index.js
+++ b/index.js
@@ -27,13 +27,13 @@ function delayed_redirect(url) {
 }
 
 const jsPsych = initJsPsych({
-  on_finish: function() {
+  on_finish: function () {
     jsPsych.getDisplayElement().innerHTML = textStimuli.complete;
   },
-  on_close: function() {
+  on_close: function () {
     delayed_redirect(import.meta.env.VITE_CLOSED_URL);
   },
-  on_data_update: function() {
+  on_data_update: function () {
     if (debug) {
       console.log(jsPsych.data.get().json());
     }
@@ -149,7 +149,7 @@ const consent_form = {
   type: jsPsychHtmlButtonResponse,
   stimulus: stimulusMap.get('consent'),
   choices: ['Exit', 'Continue'],
-  on_finish: function(data) {
+  on_finish: function (data) {
     if (data.response === 0) {
       jsPsych.abortExperiment(stimulusMap.get('no_consent'));
     }
@@ -242,22 +242,10 @@ const captcha_trials = Array.from({ length: CAPTCHA_TRIAL_COUNT }, (_, index) =>
   create_captcha_trial(index)
 );
 
-const die_probe_row = {
-  text:
-    'I suspected that the die roll was not random, or the number I received was pre-determined.',
-  value: 'SuspicionDie',
-};
-
-const difficulty_probe_row = {
-  text:
-    'I suspected that, contrary to what I was told, the captcha task difficulty was not determined by the die roll.',
-  value: 'SuspicionDifficulty',
-};
-
 const survey_function = survey => {
-  survey.onAfterRenderPage.add(function(sender, options) {
+  survey.onAfterRenderPage.add(function (sender, options) {
     console.log('Survey page rendered:', sender.currentPage);
-    if (survey.activePage.name === 'page2') {
+    if (survey.activePage.name === 'page2' || survey.activePage.name === 'page1') {
       const nextButton = document.querySelector('#sv-nav-next > div > input');
       if (nextButton) {
         let seconds = 20;
@@ -334,7 +322,7 @@ const survey_1 = {
           },
         ],
       },
-            {
+      {
         name: 'page2',
         elements: [
           {
@@ -408,6 +396,54 @@ const pre_manip_info = {
   },
 };
 
+
+const die_probe_rows = [{
+  text:
+    'I suspected that the die roll that determined captcha difficulty was rigged',
+  value: 'SuspicionDie1',
+}, {
+  text:
+    'I suspected that the number I rolled on the die roll was predetermined',
+  value: 'SuspicionDie2',
+}];
+
+const difficulty_probe_rows = [{
+  text:
+    'I suspected that the captcha difficulty was unrelated to the die roll',
+  value: 'SuspicionDifficulty1',
+}, {
+  text:
+    'I suspected that the number I rolled did not determine the captcha difficulty',
+  value: 'SuspicionDifficulty2',
+}];
+
+//shuffle the probe rows:
+
+die_probe_rows.sort(() => Math.random() - 0.5);
+difficulty_probe_rows.sort(() => Math.random() - 0.5);
+
+let page_1_probe
+let page_2_probe
+
+const catch_row = {
+  text: 'Attention check: please select "Disagree for this statement.',
+  value: 'AttentionCheck',
+};
+
+if (Math.random() < 0.5) {
+  die_probe_rows.splice(1, 0, catch_row);
+} else {
+  difficulty_probe_rows.splice(1, 0, catch_row);
+}
+
+if (probe_order === 'die_first') {
+  page_1_probe = die_probe_rows
+  page_2_probe = difficulty_probe_rows
+} else {
+  page_1_probe = difficulty_probe_rows
+  page_2_probe = die_probe_rows
+}
+
 const survey_2 = {
   type: jsPsychSurvey,
   survey_function: survey_function,
@@ -427,18 +463,7 @@ const survey_2 = {
             alternateRows: true,
             isAllRowRequired: debug ? false : true,
             rowOrder: 'random',
-            rows: [
-              probe_order === 'die_first'
-                ? die_probe_row
-                : difficulty_probe_row,
-              {
-                text: `There's no question here. Select 'Disagree' to show that you're paying attention.`,
-                value: 'AttentionCheck',
-              },
-              probe_order === 'die_first'
-                ? difficulty_probe_row
-                : die_probe_row,
-            ],
+            rows: page_1_probe,
             columns: [
               {
                 value: 5,
@@ -464,23 +489,58 @@ const survey_2 = {
           },
         ],
       },
-            {
+      {
         name: 'page2',
         elements: [
           {
-          type: 'comment',
-          title: `Please write a sentence or two on what you thought the study was about.`,
-          isRequired: debug == true ? false : true,
+            type: 'matrix',
+            name: "Please indicate your agreement with the following statements.",
+            alternateRows: true,
+            isAllRowRequired: debug ? false : true,
+            rowOrder: 'random',
+            rows: page_2_probe,
+            columns: [
+              {
+                value: 5,
+                text: 'Strongly agree',
+              },
+              {
+                value: 4,
+                text: 'Agree',
+              },
+              {
+                value: 3,
+                text: 'Neutral',
+              },
+              {
+                value: 2,
+                text: 'Disagree',
+              },
+              {
+                value: 1,
+                text: 'Strongly disagree',
+              },
+            ],
           },
-          {
-          type: 'comment',
-          title: ` Indicate any other thoughts or suspicions you had about the study. \n`,
-          isRequired: debug == true ? false : true,
-          }
         ],
       },
       {
         name: 'page3',
+        elements: [
+          {
+            type: 'comment',
+            title: `Please write a sentence or two on what you thought the study was about.`,
+            isRequired: debug == true ? false : true,
+          },
+          {
+            type: 'comment',
+            title: ` Indicate any other thoughts or suspicions you had about the study. \n`,
+            isRequired: debug == true ? false : true,
+          }
+        ],
+      },
+      {
+        name: 'page4',
         elements: [
           {
             type: 'radiogroup',
@@ -531,7 +591,7 @@ const main_experiment_timeline = [
 
 
 if (debug) {
-  timeline.push(die_roll_trial);
+  timeline.push(survey_2);
   timeline.push(...main_experiment_timeline);
 }