diff --git a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
index a5205d8ba..ea1d7cc6d 100644
--- a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
@@ -117,9 +117,6 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
         PointerTracker.DrawingProxy, MoreKeysPanel.Controller {
     private static final String TAG = MainKeyboardView.class.getSimpleName();
 
-    // TODO: Kill process when the usability study mode was changed.
-    private static final boolean ENABLE_USABILITY_STUDY_LOG = LatinImeLogger.sUsabilityStudy;
-
     /** Listener for {@link KeyboardActionListener}. */
     private KeyboardActionListener mKeyboardActionListener;
 
@@ -1069,8 +1066,8 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
         final int y = (int)me.getY(index);
 
         // TODO: This might be moved to the tracker.processMotionEvent() call below.
-        if (ENABLE_USABILITY_STUDY_LOG && action != MotionEvent.ACTION_MOVE) {
-            writeUsabilityStudyLog(me, action, eventTime, index, id, x, y);
+        if (LatinImeLogger.sUsabilityStudy) {
+            UsabilityStudyLogUtils.writeMotionEvent(me);
         }
         // TODO: This should be moved to the tracker.processMotionEvent() call below.
         // Currently the same "move" event is being logged twice.
@@ -1131,15 +1128,6 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
                 final int px = (int)me.getX(i);
                 final int py = (int)me.getY(i);
                 tracker.onMoveEvent(px, py, eventTime, me);
-                if (ENABLE_USABILITY_STUDY_LOG) {
-                    writeUsabilityStudyLog(me, action, eventTime, i, pointerId, px, py);
-                }
-                // TODO: This seems to be no longer necessary, and confusing because it leads to
-                // duplicate MotionEvents being recorded.
-                // if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
-                //     ResearchLogger.mainKeyboardView_processMotionEvent(
-                //             me, action, eventTime, i, pointerId, px, py);
-                // }
             }
         } else {
             final PointerTracker tracker = PointerTracker.getPointerTracker(id, this);
@@ -1149,35 +1137,6 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
         return true;
     }
 
-    private static void writeUsabilityStudyLog(final MotionEvent me, final int action,
-            final long eventTime, final int index, final int id, final int x, final int y) {
-        final String eventTag;
-        switch (action) {
-        case MotionEvent.ACTION_UP:
-            eventTag = "[Up]";
-            break;
-        case MotionEvent.ACTION_DOWN:
-            eventTag = "[Down]";
-            break;
-        case MotionEvent.ACTION_POINTER_UP:
-            eventTag = "[PointerUp]";
-            break;
-        case MotionEvent.ACTION_POINTER_DOWN:
-            eventTag = "[PointerDown]";
-            break;
-        case MotionEvent.ACTION_MOVE:
-            eventTag = "[Move]";
-            break;
-        default:
-            eventTag = "[Action" + action + "]";
-            break;
-        }
-        final float size = me.getSize(index);
-        final float pressure = me.getPressure(index);
-        UsabilityStudyLogUtils.getInstance().write(
-                eventTag + eventTime + "," + id + "," + x + "," + y + "," + size + "," + pressure);
-    }
-
     public void cancelAllOngoingEvents() {
         mKeyTimerHandler.cancelAllMessages();
         mDrawingHandler.cancelAllMessages();
diff --git a/java/src/com/android/inputmethod/latin/utils/UsabilityStudyLogUtils.java b/java/src/com/android/inputmethod/latin/utils/UsabilityStudyLogUtils.java
index 729a8723d..06826dac0 100644
--- a/java/src/com/android/inputmethod/latin/utils/UsabilityStudyLogUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/UsabilityStudyLogUtils.java
@@ -25,6 +25,7 @@ import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Process;
 import android.util.Log;
+import android.view.MotionEvent;
 
 import com.android.inputmethod.latin.LatinImeLogger;
 
@@ -109,6 +110,43 @@ public final class UsabilityStudyLogUtils {
         LatinImeLogger.onPrintAllUsabilityStudyLogs();
     }
 
+    public static void writeMotionEvent(final MotionEvent me) {
+        final int action = me.getActionMasked();
+        final long eventTime = me.getEventTime();
+        final int pointerCount = me.getPointerCount();
+        for (int index = 0; index < pointerCount; index++) {
+            final int id = me.getPointerId(index);
+            final int x = (int)me.getX(index);
+            final int y = (int)me.getY(index);
+            final float size = me.getSize(index);
+            final float pressure = me.getPressure(index);
+
+            final String eventTag;
+            switch (action) {
+            case MotionEvent.ACTION_UP:
+                eventTag = "[Up]";
+                break;
+            case MotionEvent.ACTION_DOWN:
+                eventTag = "[Down]";
+                break;
+            case MotionEvent.ACTION_POINTER_UP:
+                eventTag = "[PointerUp]";
+                break;
+            case MotionEvent.ACTION_POINTER_DOWN:
+                eventTag = "[PointerDown]";
+                break;
+            case MotionEvent.ACTION_MOVE:
+                eventTag = "[Move]";
+                break;
+            default:
+                eventTag = "[Action" + action + "]";
+                break;
+            }
+            getInstance().write(eventTag + eventTime + "," + id + "," + x + "," + y + "," + size
+                    + "," + pressure);
+        }
+    }
+
     public void write(final String log) {
         mLoggingHandler.post(new Runnable() {
             @Override