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I have the following model: var Soq = Backbone.model.extend({ default:{ 'name': 'something' , 'parents': [] //array will be passed by reference to attributes hash on new object instantiation } }); I am new to javascript and backbone but looking at the source I think what might be happening is that when this model's attributes get set to the defaults (backbone.js: 137) and the default value is an object it is done by reference. This means that when I do something like this: var soq = new Soq; var parents = soq.get('parents'); parents.push('parent'); //changes defaults of the proto object var soq2 = new Soq; console.log(soq2.get('parents');); //will output ['parent'] console.log(soq2.defaults.parents); //will output ['parent'] Am I understanding this correctly, and if so what is the best way to set default values that are objects without making them subject to change anytime a future instance references them? Let me know if I am being unclear or misunderstanding something. Thanks in advance for your time.

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