Index: lams_tool_survey/src/java/org/lamsfoundation/lams/tool/survey/web/controller/LearningController.java
===================================================================
diff -u -r3ee06bc1b00b1673399c1871a73cfa1d8ec2c0db -r72d0843d3304959c18b3386b7e938835f795982b
--- lams_tool_survey/src/java/org/lamsfoundation/lams/tool/survey/web/controller/LearningController.java	(.../LearningController.java)	(revision 3ee06bc1b00b1673399c1871a73cfa1d8ec2c0db)
+++ lams_tool_survey/src/java/org/lamsfoundation/lams/tool/survey/web/controller/LearningController.java	(.../LearningController.java)	(revision 72d0843d3304959c18b3386b7e938835f795982b)
@@ -233,14 +233,15 @@
     }
 
     @RequestMapping(value = "/nextQuestion")
-    private String nextQuestion(@ModelAttribute("surveyForm") AnswerForm surveyForm,
-	    MultiValueMap<String, String> errorMap, HttpServletRequest request) {
+    private String nextQuestion(@ModelAttribute("surveyForm") AnswerForm surveyForm, HttpServletRequest request) {
 	Integer questionSeqID = surveyForm.getQuestionSeqID();
 	String sessionMapID = surveyForm.getSessionMapID();
 
 	SessionMap<String, Object> sessionMap = (SessionMap<String, Object>) request.getSession()
 		.getAttribute(sessionMapID);
 	SortedMap<Integer, AnswerDTO> surveyItemMap = getQuestionList(sessionMap);
+	MultiValueMap<String, String> errorMap = new LinkedMultiValueMap<>();
+	getAnswer(request, surveyItemMap.get(questionSeqID), errorMap);
 
 	if (!errorMap.isEmpty()) {
 	    request.setAttribute("errorMap", errorMap);
@@ -276,15 +277,17 @@
     }
 
     @RequestMapping(value = "/previousQuestion")
-    private String previousQuestion(@ModelAttribute("surveyForm") AnswerForm surveyForm,
-	    MultiValueMap<String, String> errorMap, HttpServletRequest request) {
+    private String previousQuestion(@ModelAttribute("surveyForm") AnswerForm surveyForm, HttpServletRequest request) {
 	Integer questionSeqID = surveyForm.getQuestionSeqID();
 	String sessionMapID = surveyForm.getSessionMapID();
 
 	SessionMap<String, Object> sessionMap = (SessionMap<String, Object>) request.getSession()
 		.getAttribute(sessionMapID);
 	SortedMap<Integer, AnswerDTO> surveyItemMap = getQuestionList(sessionMap);
 
+	MultiValueMap<String, String> errorMap = new LinkedMultiValueMap<>();
+	getAnswer(request, surveyItemMap.get(questionSeqID), errorMap);
+
 	if (!errorMap.isEmpty()) {
 	    request.setAttribute("errorMap", errorMap);
 	    return "pages/learning/learning";