The Java runtime environment is required to use the applet. Download it from https://java.com/download/.
If you click on the MAKE A LESION button, one of the arrows or boxes is randomly selected and no longer functions. Your mission is to discover which box or arrow is lesioned by administering tests to the system and seeing whether the system can still perform the test or fails on it.
To administer a test, click on the RUN A TEST button then click on a test description in the scrollable list of tests. You'll get a message at the bottom right hand corner of the window telling you whether the damaged system succeeded or failed on this test.
When you think you know which box or arrow is the lesioned one, click on the PROPOSE A LESION button, then click on the box or arrow that you suspect is the lesioned one. The system will tell you whether you are right or wrong.
If you are unsure what is involved in one of the tests, select DESCRIBE A TEST from the ACTIONS menu, then click on the relevant test name in the scrollable window.
If you are unsure what the function of a particular module (box) is, select DESCRIBE A MODULE from the ACTIONS menu, then click on the module you want to learn more about.
If you want to know, for any module or connection, which tests require that this module or connection be intact for success on the test, select WHICH TESTS DEPEND from the ACTIONS menu, and then click on the module or connection you are interested in.
If, as you are proceeding with testing, you want to know what boxes and arrows you have demonstrated to be intact so far, check the REVEAL BOXES AND ARROWS box. Now whenever you administer a test that the system succeeds on, the boxes and arrows that must be intact for success on that test turn green.
If at any time you want to know what lesion was made, click on the SHOW THE LESION button. The lesioned region of the model will turn red and flash.
If you want to make the lesion yourself, when the MAKE A LESION button is showing, click on a box or arrow to lesion it.
NOTE: Quite often there is no way of assessing whether it is a box that is damaged or the arrow coming into it e.g. lesioning the letter-to-sound rules box or lesioning the arrow coming in to it has the same effect. Wherever this is the case, the set of boxes and arrows which can't be discriminated are grouped together so that if one is lesioned all are treated as having been lesioned.