Get value when selected ng-option changes

as Artyom said you need to use ngChange and pass ngModel object as argument to your ngChange function

Example:

<div ng-app="App" >
  <div ng-controller="ctrl">
    <select ng-model="blisterPackTemplateSelected" ng-change="changedValue(blisterPackTemplateSelected)" 
            data-ng-options="blisterPackTemplate as blisterPackTemplate.name for blisterPackTemplate in blisterPackTemplates">
      <option value="">Select Account</option>
    </select>
    {{itemList}}     
  </div>       
</div>

js:

function ctrl($scope) {
  $scope.itemList = [];
  $scope.blisterPackTemplates = [{id:1,name:"a"},{id:2,name:"b"},{id:3,name:"c"}];

  $scope.changedValue = function(item) {
    $scope.itemList.push(item.name);
  }       
}

Live example: http://jsfiddle.net/choroshin/9w5XT/4/

Best practise is to create an object (always use a . in ng-model)

In your controller:

var myObj: {
     ngModelValue: null
};

and in your template:

<select 
    ng-model="myObj.ngModelValue" 
    ng-options="o.id as o.name for o in options">
</select>

Now you can just watch

myObj.ngModelValue

or you can use the ng-change directive like so:

<select 
    ng-model="myObj.ngModelValue" 
    ng-options="o.id as o.name for o in options"
    ng-change="myChangeCallback()">
</select>

The egghead.io video "The Dot" has a really good overview, as does this very popular stack overflow question: What are the nuances of scope prototypal / prototypical inheritance in AngularJS?

I may be late for this but I had somewhat the same problem.

I needed to pass both the id and the name into my model but all the orthodox solutions had me make code on the controller to handle the change.

I macgyvered my way out of it using a filter.

<select 
        ng-model="selected_id" 
        ng-options="o.id as o.name for o in options" 
        ng-change="selected_name=(options|filter:{id:selected_id})[0].name">
</select>
<script>
  angular.module("app",[])
  .controller("ctrl",['$scope',function($scope){
    $scope.options = [
      {id:1, name:'Starbuck'},
      {id:2, name:'Appolo'},
      {id:3, name:'Saul Tigh'},
      {id:4, name:'Adama'}
    ]
  }])
</script>

The "trick" is here:

ng-change="selected_name=(options|filter:{id:selected_id})[0].name"

I'm using the built-in filter to retrieve the correct name for the id

Here's a plunkr with a working demo.

Please, use for it ngChange directive. For example:

<select ng-model="blisterPackTemplateSelected" 
        ng-options="blisterPackTemplate as blisterPackTemplate.name for blisterPackTemplate in blisterPackTemplates" 
        ng-change="changeValue(blisterPackTemplateSelected)"/>

And pass your new model value in controller as a parameter:

ng-change="changeValue(blisterPackTemplateSelected)"