Exciting stimulation for cognitive experiments

eevoke is a stimulation package for cognitive research that can present media such as images, sound or movies as stimulus to the patient or subject. Stimulus presentations can be visual, auditory or a combination of these.

Besides, eevoke can be interfaced with external devices such as flash, electrical or pain stimulators. Trigger information is sent to external devices by means of serial or parallel port connection.

Real-time data visualization

Using the eevoke package, stimulation is controlled through a scenario. Scenarios contain information regarding the timing and event codes of multimedia files, and define the sequence of trials and blocks in the experiment. Both presentation and corresponding control information are interpreted in real time, resulting in a complete and highly flexible environment for stimulation.

Audio cue points for productive experimenting

Cue points in sound files can be used as extra triggers. This is extremely useful when you want to present sentences or music and you need to mark the beginning and end of certain pieces in the sound. eevoke automatically creates one trigger at the start of the sound file and then additional ones at the cue points inside the sound file. Cue points are part of the wave file definition and can easily be edited using, e.g., the GoldWave editor

Tests with utmost timing accuracy

The delay between the moment a stimulus is presented to the subject and the moment a trigger code is sent to the amplifier is below 1 ms. Visual stimuli are presented in synchrony with the refresh rate of the stimulation monitor.

eevoke provides optimal synchronization of the stimuli with your recordings and maximum ease of use.

eevoke runs on a PC with the Microsoft Windows XP operating system.

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