             case Keyboard.SPACE:
             {
                 currentRenderer = dataGroup.getElementAt(focusedIndex) as IItemRenderer;
-                if (!currentRenderer || (currentRenderer.selected && requiresSelection))
+                if (!currentRenderer || (currentRenderer.selected && requireSelection))
                     return;
                 currentRenderer.dispatchEvent(event);
                 break;

                if (focusedIndex < dataProvider.length - 1 || arrowKeysWrapFocus)
                {
                    if (currentRenderer)
                        currentRenderer.caret = false;
                    focusedIndex = (focusedIndex + 1) % length;
                    adjustLayering(focusedIndex);
                    renderer = dataGroup.getElementAt(focusedIndex) as IItemRenderer;
                    if (renderer)
                        renderer.caret = true;
                }

                event.stopPropagation();

            var renderer:IItemRenderer = 
                dataGroup.getElementAt(index) as IItemRenderer;
            if (renderer)
                renderer.showsCaret = focused;
        }
    }
}
