Stimulus

The Stimulus namespace includes a number of classes used in the presentation of stimulus as coordinated by a trial behaviour.

Presenters are ideally dumb components used by trial behaviours to display stimulus.
However, they may also implement selection and target indication logic.

Collections are provided to hold and/or find references to a set of presenters. Companion behaviours trigger selection and target indication methods on the referenced presenters. Utility methods are also provided to fetch a subset of references presenters culled by selection availability and visibility.

Stimulus is not relevant to all paradigms.