• ParameterExplanationNrec

Documentation of nrec Parameters

1. Data Acquisition

•  sampling rate 

  • Acquired samples per second by the daq card.

•  SubdeviceID for AIn eye position recording (16ch) 

  • The ID of the analog input subdevice (find out via comedi_test -t info).

•  SubdeviceID for DIn spike recording (24ch) 

  • The ID of the digital input subdevice (find out via comedi_test -t info). If no spikes or comparable digital signals are to be recorded, set this value to -1.

•  SubdeviceID for other DIO (8ch) 

  • The ID of the digital in-/output subdevice (find out via comedi_test -t info). The trial trigger is on channel 0 output. The other channels may be used for response buttons, reward signals, LEDs and similar things.

2. Experiment file

•  Experiment file 

  • Path and filename of the last experiment configuration used. Usually this is not modified here.

3. Eye position module

3.1. Calibration

•  Channel 0 

  • Currently used horizontal calibration coefficients. These are the 6 coefficients a,b,c,d,e,f in the voltage (x) to gaze_angle funtion:
    ganze_angle = a + b * x + c * y + d * x² + e * x * y + f * y².
    Usually this is not modified here.

•  Channel 1 

  • Currently used vertical calibration coefficients. These are the 6 coefficients a,b,c,d,e,f in the voltage (x) to gaze_angle funtion:
    ganze_angle = a + b * x + c * y + d * x² + e * x * y + f * y².
    Usually this is not modified here.

•  # Channels 

  • Number of channels used for eye position calibration. Use 1 for x-only mode or 2 for x-y-mode.

•  # Coefficient/channel 

  • Number of calibration coefficients per channel. Order of the polynomial in the above equations. Currently only a value of 6 is implemented.

3.2. Input hardware

•  # Channels 

  • Number of channels used for eye position measurement. Currently only a value of 2 is implemented.
    Usually this is not modified here.

•  Device ID 

  • Device ID for eye movement data acquisition. Usually 0.

•  Subevice ID  

  • Subdevice ID for eye movement data acquisition. Usually equals DAQ/SUBDEVICE_ID_AIN.

•  X Channel ID 

  • ID of channel for horizontal eye position. Usually 0.

•  Y Channel ID 

  • ID of channel for vertical eye position. Usually 1.

... to be continued