Device for even mental training comprising: a sensor (50) for detecting the heart rate variability of a user, a recording module (14) for recording of speech information, a processing module (16) for generating device modified speech information on the basis of the recorded speech information, a rendering module (18) for the reproduction of the device modified speech information, an activation module (20) for increasing the attention of the user with a lighting device (22), which comprises a pulsed light source, undefined inert control unit (54), which is configured, the rendering module (18) and / or the activation module (20), as a function of the sensor (50) to control heart rate variability measured.
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