That is why I suggested using the index of the item as well to check when when the value is selected. For example, in the `onSelectionChange` method:

```coffee
onSelectionChange: (event) ->
    # Compare the DOM element of the 'null' option
    option = $ui.items.first()[0]
    @collection.each (model) =>
        if  event.target isnt option
            model.set('selected', model.get('value') is event.target.value)
```