diff --git a/include/osg/Stats b/include/osg/Stats
index f0e75f4b5..b99b1f903 100644
--- a/include/osg/Stats
+++ b/include/osg/Stats
@@ -43,8 +43,8 @@ class OSG_EXPORT Stats : public osg::Referenced
         bool setAttribute(int frameNumber, const std::string& attributeName, double value);
         bool getAttribute(int frameNumber, const std::string& attributeName, double& value) const;        
 
-        bool getAveragedAttribute(const std::string& attributeName, double& value) const;        
-        bool getAveragedAttribute(int startFrameNumber, int endFrameNumber, const std::string& attributeName, double& value) const;        
+        bool getAveragedAttribute(const std::string& attributeName, double& value, bool averageInInverseSpace=false) const;
+        bool getAveragedAttribute(int startFrameNumber, int endFrameNumber, const std::string& attributeName, double& value, bool averageInInverseSpace=false) const;        
         
         AttributeMap& getAttributeMap(int frameNumber);
         const AttributeMap& getAttributeMap(int frameNumber) const;
diff --git a/src/osg/Stats.cpp b/src/osg/Stats.cpp
index f047176a7..3626093ed 100644
--- a/src/osg/Stats.cpp
+++ b/src/osg/Stats.cpp
@@ -80,12 +80,12 @@ bool Stats::getAttribute(int frameNumber, const std::string& attributeName, doub
     return true;
 }
 
-bool Stats::getAveragedAttribute(const std::string& attributeName, double& value) const
+bool Stats::getAveragedAttribute(const std::string& attributeName, double& value, bool averageInInverseSpace) const
 {
-    return getAveragedAttribute(getEarliestFrameNumber(), getLatestFrameNumber(), attributeName, value);
+    return getAveragedAttribute(getEarliestFrameNumber(), getLatestFrameNumber(), attributeName, value, averageInInverseSpace);
 }
 
-bool Stats::getAveragedAttribute(int startFrameNumber, int endFrameNumber, const std::string& attributeName, double& value) const
+bool Stats::getAveragedAttribute(int startFrameNumber, int endFrameNumber, const std::string& attributeName, double& value, bool averageInInverseSpace) const
 {
     if (endFrameNumber<startFrameNumber)
     {
@@ -99,13 +99,15 @@ bool Stats::getAveragedAttribute(int startFrameNumber, int endFrameNumber, const
         double v = 0.0;
         if (getAttribute(i,attributeName,v))
         {
-            total += v;
+            if (averageInInverseSpace) total += 1.0/v;
+            else total += v;
             numValidSamples += 1.0;
         }
     }
     if (numValidSamples>0.0)
     {
-        value = total/numValidSamples;
+        if (averageInInverseSpace) value = numValidSamples/total;
+        else value = total/numValidSamples;
         return true;
     }
     else return false;
diff --git a/src/osgViewer/StatsHandler.cpp b/src/osgViewer/StatsHandler.cpp
index 13a7f44ba..554cd0ffa 100644
--- a/src/osgViewer/StatsHandler.cpp
+++ b/src/osgViewer/StatsHandler.cpp
@@ -190,14 +190,14 @@ void StatsHandler::setUpHUDCamera(osgViewer::Viewer* viewer)
 
 struct TextDrawCallback : public virtual osg::Drawable::DrawCallback
 {
-    TextDrawCallback(osg::Stats* stats, const std::string& name, int frameDelta, double multiplier = 1.0):
+    TextDrawCallback(osg::Stats* stats, const std::string& name, int frameDelta, bool averageInInverseSpace, double multiplier):
         _stats(stats),
         _attributeName(name),
         _frameDelta(frameDelta),
+        _averageInInverseSpace(averageInInverseSpace),
         _multiplier(multiplier),
         _tickLastUpdated(0)
     {
-        _tickLastUpdated = osg::Timer::instance()->tick();
     }
 
     /** do customized draw code.*/
@@ -212,7 +212,7 @@ struct TextDrawCallback : public virtual osg::Drawable::DrawCallback
         {
             _tickLastUpdated = tick;
             double value;
-            if (_stats->getAveragedAttribute( _attributeName, value))
+            if (_stats->getAveragedAttribute( _attributeName, value, _averageInInverseSpace))
             {
                 sprintf(_tmpText,"%4.2f",value * _multiplier);
                 text->setText(_tmpText);
@@ -229,6 +229,7 @@ struct TextDrawCallback : public virtual osg::Drawable::DrawCallback
     osg::Stats*     _stats;
     std::string     _attributeName;
     int             _frameDelta;
+    bool            _averageInInverseSpace;
     double          _multiplier;
     mutable char    _tmpText[128];
     mutable osg::Timer_t    _tickLastUpdated;
@@ -502,7 +503,7 @@ void StatsHandler::setUpScene(osgViewer::Viewer* viewer)
         frameRateValue->setPosition(pos);
         frameRateValue->setText("0.0");
 
-        frameRateValue->setDrawCallback(new TextDrawCallback(viewer->getStats(),"Frame rate",-1));
+        frameRateValue->setDrawCallback(new TextDrawCallback(viewer->getStats(),"Frame rate",-1, true, 1.0));
 
         pos.y() -= characterSize*1.5f;
 
@@ -543,7 +544,7 @@ void StatsHandler::setUpScene(osgViewer::Viewer* viewer)
             eventValue->setPosition(pos);
             eventValue->setText("0.0");
 
-            eventValue->setDrawCallback(new TextDrawCallback(viewer->getStats(),"Event traversal time taken",-1, 1000.0));
+            eventValue->setDrawCallback(new TextDrawCallback(viewer->getStats(),"Event traversal time taken",-1, false, 1000.0));
 
             pos.x() = startBlocks;
             osg::Geometry* geometry = createGeometry(pos, characterSize *0.8, colorUpdateAlpha, _numBlocks);
@@ -576,7 +577,7 @@ void StatsHandler::setUpScene(osgViewer::Viewer* viewer)
             updateValue->setPosition(pos);
             updateValue->setText("0.0");
 
-            updateValue->setDrawCallback(new TextDrawCallback(viewer->getStats(),"Update traversal time taken",-1, 1000.0));
+            updateValue->setDrawCallback(new TextDrawCallback(viewer->getStats(),"Update traversal time taken",-1, false, 1000.0));
 
             pos.x() = startBlocks;
             osg::Geometry* geometry = createGeometry(pos, characterSize *0.8, colorUpdateAlpha, _numBlocks);
@@ -684,7 +685,7 @@ osg::Node* StatsHandler::createCameraStats(const std::string& font, osg::Vec3& p
         cullValue->setPosition(pos);
         cullValue->setText("0.0");
 
-        cullValue->setDrawCallback(new TextDrawCallback(stats,"Cull traversal time taken",-1, 1000.0));
+        cullValue->setDrawCallback(new TextDrawCallback(stats,"Cull traversal time taken",-1, false, 1000.0));
 
         pos.x() = startBlocks;
         osg::Geometry* geometry = createGeometry(pos, characterSize *0.8, colorCullAlpha, _numBlocks);
@@ -717,7 +718,7 @@ osg::Node* StatsHandler::createCameraStats(const std::string& font, osg::Vec3& p
         drawValue->setPosition(pos);
         drawValue->setText("0.0");
 
-        drawValue->setDrawCallback(new TextDrawCallback(stats,"Draw traversal time taken",-1, 1000.0));
+        drawValue->setDrawCallback(new TextDrawCallback(stats,"Draw traversal time taken",-1, false, 1000.0));
 
 
         pos.x() = startBlocks;
@@ -752,7 +753,7 @@ osg::Node* StatsHandler::createCameraStats(const std::string& font, osg::Vec3& p
         gpuValue->setPosition(pos);
         gpuValue->setText("0.0");
 
-        gpuValue->setDrawCallback(new TextDrawCallback(stats,"GPU draw time taken",-1, 1000.0));
+        gpuValue->setDrawCallback(new TextDrawCallback(stats,"GPU draw time taken",-1, false, 1000.0));
 
         pos.x() = startBlocks;
         osg::Geometry* geometry = createGeometry(pos, characterSize *0.8, colorGPUAlpha, _numBlocks);