Electrophysiological research

The Institute of Psychology owns four electrophysiological laboratories and several mobile and immobile facilities for physiological measurements (heartbeat, galvanic skin conductance, eye tracking etc.).

The EEG labs are equipped with Biosemi Active Two DC amplifiers, featuring local amplification of physiological signals over the source, and an unfiltered throughput of physiological signals for 24-bit digitization at a maximum of 2048 samples/sec. There is one setup for 74 channel, one for 136 channel, and two for 40 channel recordings. This involves the use of an electrocap for 32, 64 or 128 positions, and 8-10 separate electrodes. Per setup there is a test room, in which subjects are seated in an adjustable chair. Two 4-button response boxes per setup are mounted at the end of each arm rests. Alternatively, responses can be sampled through a microphone (both audio recording and discrete voicekey recording), two pedals or other discrete response devices. eeg

Combinations between EEG recording, Tobii eye tracker recording and BioPac recording of peripheral measures are possible. Per setup, there is a PC for recording time series, and a PC for stimulus presentation. The stimulus presentation PC controls two identical 19" 100 Hz CRT monitors or LCD monitors. Auditory stimulus presentation is possible with a stereo air pulse head phone system or mini speakers. Stimulus presentation takes place using the E-prime 2 experiment control software. Stimulus presentation time and responses are recorded along with EEG. Monitoring data acquisition is done with LabView data acquisition software. Off-line analysis of EEG takes place using Brain Vision Analyzer or BESA software.