READ ME File For 'Cortical response to continous speech with additional pauses inserted between words' dataset Dataset (assigned) DOI: https://doi.org/10.5258/SOTON/D2281 README Author: Suwijak Deoisres, University of Southampton (sd1n17@soton.ac.uk) This dataset supports the PhD thesis: "Auditory cortical responses as an objective predictor of speech-in-noise performance" [specifically chapter 4 and 5] --------------------- Contents --------------------- - Overview for EEG data - Pause_EEG_Da - Pause_EEG_Speech - Pause_Speech_Stimuli - Pause_Stimuli_Order --------------------- Overview for EEG data --------------------- *All EEG were recorded and saved as .bdf using Biosemi ActiveTwo 32-channel system. *Tigger channel is channel number 48 in the EEG .bdf file. *EEG data were collected from 17 subjects (S1 to S17). *The subject number (e.g., S1) in both the Da and Speech files indicates that the data are from the same individual. *A Python script name "Load_bdf.py" provides an example on how the raw data can be extracted (additional Python package maybe needed). --------------------- Pause_EEG_Da --------------------- - Raw (unprocessed and unreferenced) recordings of cortical auditory evoked potentials (CAEP) in response to 200 /da/ stimuli (alternating polarity). - No EEG response to da is available for Subject 2 (S2) due to technical issues during the data collection. - The responses to each /da/ sound are segmented by the triggers in the trigger channel, with an inter-stimulus interval of 1.11 seconds. - The stimuli used for data collection is included in this folder, "DA_40_ms_1.11_ISI_200_reps.wav". --------------------- Pause_EEG_Speech --------------------- - Raw (unprocessed and unreferenced) recodings of cortical responses to natural speech and speech with additional pauses inserted between words. - EEG for each subject contain responses to stimuli in all speech pause condition. - The responses to the different speech pause conditions are divided by 12 triggers in the trigger channel. - Please note that subject 8 EEG data has a missing trigger, therefore, this subject was not included in the analysis. --------------------- Pause_Speech_Stimuli --------------------- - Twelve audio files are in .wav format, 44.1kHz sampling frequency. - The file name includes 1_1, 1_2, 1_3, and 1_4, which represent the order of story progression. - The 0_s, 0.25_s, and 0.5_s at the end of each file indicate natural speech, speech with a short pause, and speech with a long pause stimuli, respectively. --------------------- Pause_Stimuli_Order --------------------- - The "Pause_stimuli_order.mat" file contains information about the order of stimuli segment and speech pause condtion presented to each participant. - Twelve cells down each column indicates the order of stimuli segment presented to each participant (column headers). - The table below shows the stimuli order and thier associated speech pause condition. - N, S, and L indicates the natural speech, speech with short, long pause conditions, respectively. Condition Segment| N | S | L ------- ------------ 1_1 | 1 | 2 | 3 1_2 | 4 | 5 | 6 1_3 | 7 | 8 | 9 1_4 | 10|11 |12 *For example, segments of EEG responses to natural speech will be segments indicated by the number 1, 4, 7, and 10 (in the cells), which correspond to EEG segments number 5, 10, 3, and 8 (row headers). ************************************************* Geographic location of data collection: University of Southampton, U.K. Dataset available under a CC BY 4.0 licence Publisher: University of Southampton, U.K. Date: March 2023