#easyNet demo

Running a trial
A single trial is sufficient to illustrate some of the complex nonlinear behaviour of the model. The default trial type associated with the IA model is a brief masked presentation of a letter string – these are the sorts of trials that McClelland and Rumelhart focussed on in their 1981 and 1982 papers. 

![control_bar1.png](control_bar1.png)

As you can see in the control bar at the top of the screen, to run this type of trial you need to specify: 



1. the **stimulus**
2. the **stimulus duration**, and 
3. the **mask duration**. 

The latter two arguments have default values of 15 and 25 cycles, so to run our first trial it’s sufficient to enter a letter string in the box labelled **stimulus**. 

Let's use the same example as McClelland and Rumelhart : the letter string **mave**. 

![control_bar2.png](control_bar2.png)

When you type this in you should see the triangle icon![Run button](small_run_button.png) on the right of the control bar turn to green to indicate that all the necessary fields have been entered. You are ready to run a trial. But before doing that, let's specify the output that we'd like to see from this trial.

[Next: Specifying the output](page3 "Specifying the output")