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# Assistant usage

Before using the assistant, you have to start Excel and open the worksheet where your data is. Then you navigate into the tools menu, go to the eirt sub-menu and choose the start the assistant option.

Figure 3.1: Starting the assistant.

The eirt program is an assistant like program with four step. At each step, the program gives a brief instruction, you give the information asked and then click on the next button. At the end of this process a report is generated.

At any step of the assistant, you can click on the back button to go at the previous step, on the cancel button to stop the program, or on the help button to get help.

Subsections

- Step 1 : the data selection
- Step 2 : the data type definition
  - Binary type
  - Multiple choice type
  - Graded type
- Step 3 : the model or method choice
  - The one parameter logistic model
  - The two parameters logistic model
  - The three parameters logistic model
  - The nominal response model
  - The graded response model
  - The kernel estimator
  - The penalized maximum marginal likelihood estimator
- Step 4 : the report options
  - The classical test theory statistics
  - The test of fit
  - The test of local independance
  - The item parameters
  - The ability estimates
  - The item and option characteristic curves
  - The information functions
  - The standard errors
  - All the data points from the plots
- The report
  - The classical test theory statistics
  - The estimation summary
  - The test of fit
  - The test of local independance
  - The item parameter
  - The ability estimates
  - The item and option characteristic curves
  - The information functions
  - All the data points from the plots
  - The pages header and footer