Supervision of speech production

An improved exit device can be used with a door having anyone of a plurality of latch arrangements including a vertical latch arrangement with latch assemblies at the top and bottom of the door, a lateral latch arrangement with a latch assembly near the center of the door, and a combination vertical and lateral latch arrangement. In addition, the exit device can be associated with latch assemblies which are either concealed within the door or mounted on the surface of the door. The exit device includes a channel shaped slide member which is adapted to be connected with vertical and/or lateral latch assemblies. When a crossbar is depressed, the slide member is moved along a vertical path to actuate the associated latch assemblies from an engaged condition to a disengaged condition. The slide member can also be moved by a suitable outside actuator, such as a thumbpiece or knob. The exit device is advantageously provided with a holdback or dogging cam which is rotated to hold the slide member in a position in which the latch assemblies are disengaged. In addition, the exit device may be provided with a deadlatching dog which is operated from a locking position to a release position as the crossbar is depressed.