# Programming Trial Control

Follow this section if you need more information on how to define conditions and actions in the Start-Stop trial rule.

tip Before defining Trial Control in EthoVision XT, draw your experimental procedure as a flowchart, where each block represents either an action or a condition which, when met, triggers other actions or conditions.

Learn about

▪Conditions

▪Actions

▪External commands

▪Operators

See also

▪Useful things to know

▪Re-use trial control elements

▪Working with trial control boxes

Other manuals

For further information, including information on controlling hardware devices such as the PhenoTyper Top Unit, the Pellet dispenser, PhenoWheel and the Lickometer, see the EthoVision XT 19 - Trial and Hardware Control - Reference Manual. To open this manual, choose Apps > Noldus > EthoVision XT 19 Other Documentation.