The EEG Lab is located in one of the custom-built laboratory booths of the Phonetics Laboratory and consists of an electrically insulated, sound-attenuated recording booth and an adjacent control room. The lab owns two separate EEG systems, including a high-impedance 128-electrode EEG system from EGI and a high-impedance EEG system from BioSemi. Both EEG systems use E-prime for stimulus presentation. EEG recordings are processed and analysed using Net Station and MATLAB packages such as EEGLAB, ERPLAB, EP-toolkit, or RAGU.

EEG-system from EGI 

This 128-electrode EEG system can be used in combination with eye-tracking and is permanently set up in the lab. This system enables quick, gel-free application of dense array electrodes in a net and is therefore optimal for infant and patient participants. In addition, it provides the possibility to run topographical event-related potential analyses.

Mobile EEG-system from BioSemi

This system is compact and mobile. It has 16 to 24 active electrodes that can be applied using conduction gel and, that generate a high signal quality in each channel. We have used this system in preschools within the Stockholm area to study the neural correlates of children’s attention.

Mismatch Negativity (MMN) and N400

At the EEG Lab, we predominantly use the event-related potential components mismatch negativity and N400. The mismatch negativity reflects discrimination and memory traces. For example, we use it to study development of speech sound categorization in infants and to probe semantic information in adults’ prosodic processing in English, Turkish, and Swedish. The N400 is a response to deviation from anticipated meaning. We use it to study how ambiguous sentences are understood, how toddlers attach meaning to words, and how children with cochlear implants process meaning.