Common Features > Using Assessments > Running Assessments > Deploying and validating the assessment session > Defining assessment session scope
Defining assessment session scope
Having deployed the assessment session, you can define the scope, that is select the assessment nodes you want to include in your session.
*By default, all assessment nodes are taken into account.
Accessing effective scope
To access the list of calculated assessment nodes:
*Open the properties of the assessment session and select the Effective Scope tab.
The list of assessment nodes appears. The following information is presented in columns:
• Validity for assessment - "Valid" is the default value
• The objects defining the assessment context
• Assessed object
• Respondent
Modifying effective scope
From the Effective Scope tab of a session, you can:
• delete or add assessment nodes
• validate or unvalidate assessment nodes
• modify the defined respondent
*If you have defined the scope on the assessment campaign, you do not necessarily need to redefine it on the assessment session.
Duplicating assessment nodes 
This function allows you, for example, to define several respondents for the same object in the same context.
To duplicate assessment nodes:
1. In the properties of the session, select the Effective Scope tab.
2. Select the elements that interest you and click Duplicate.
Defining respondents 
To define respondents:
1. In the properties of the session, select the Effective Scope tab.
2. Select the elements that interest you and click Set Respondent.
Unvalidating assessment nodes 
To unvalidate assessment nodes:
1. In the properties of the session, select the Effective Scope tab.
The list of assessment nodes from your deployment appears.
*These are basic assessment nodes that will then be used to create corresponding assessment nodes used at execution of the aggregation schema.
2. Select the assessment nodes you want to remove from the session and click Unvalidate.