Appendix 20: ZScore
Support for Applied Neuroscience, Inc. (ANI) Z Score training is available in EEGer version 4.2. These instructions provide directions to set up and activate the Z Scores feature in EEGer.
For Z Scores to function in EEGer, the following items must be valid:
EEGer version 4.2 and subsequent program updates are available on CD from EEG Spectrum Systems or can be downloaded from the EEGer website: www.eeger.com <http://www.eeger.com/>. Follow instructions provided with the CD or on the website to install.
Be sure to check the option to INSTALL THE ANI ZSCORE FILES on the Select Additional Tasks display during the installation process.
1. Insert the EEGer Keyblock File CD in your CD/DVD drive.
2. If the contents of the CD are displayed automatically, close the window. You must load the key using EEGer.
3. Start the EEGer program. From the Files menu, select Read EEGer Keyblock Files.
4. Select the CD/DVD drive for the Look In field.
5. The updated keyfile is displayed on the Open dialog. Click the filename to select/highlight and click Open.
A. Start the EEGer program, if necessary.
B. From the Files menu, select Create ANI Biofeedback Key. Accept the License agreement and the key screen appears:
Applied Neuroscience, Inc. / 228 176th Terrace Drive / St. Petersburg, Fl 33708
PHONE: (727)244-0240 / FAX: (727) 319-1027 / EMAIL: qeeg@appliedneuroscience.com <mailto:qeeg@appliedneuroscience.com>
NOTE: The ANI Z Score Security Key is computer specific. If you install EEGer on another computer or have to recover after hard drive failure, you must contact ANI to obtain a new Security Key.
EEGer REWARD MODES FOR Z SCORES
In Plan Session, for the Z Score Setup stage, click the Feedback button to choose the desired mode. The mode can also be changed on the EEG training display by pressing Shift+F3 to select a different reward mode.
ZAsymm - reward is standard deviation of absolute asymmetry for designated frequency band (2 channels)
ZCohere - reward is standard deviation of coherence for designated frequency band (2 channels)
ZPhase - reward is standard deviation of absolute phase for designated frequency ban (2 channels)
ZAbsPwrA - reward is standard deviation of absolute power from A site for designated frequency band
ZAbsPwrB - reward is standard deviation of absolute power from B site for designated frequency band
ZRelPwrA - reward is standard deviation of relative power from A site for designated frequency band
ZRelPwrB - reward is standard deviation of relative power from B site for designated frequency band
ZPRatioA - reward is standard deviation of power rations from A site for designated frequency band
ZPRatioB - reward is standard deviation of power rations from B site for designated frequency band
NOTE: For Z Score training, enter a second training site (Input ChB) even if using a single-channel feedback mode. If only one site is entered, a "site error" may appear on the EEG training or replay screen. EEGer checks for a valid two-channel setup in case of a change to a two-channel mode while on the EEG training display.
EEGer automatically adjusts frequency bands when entering/exiting a Z Score feedback mode to match the closest standardized Z Score band.
Frequency Bands Enter this reward frequency range in EEGer Plan Session
Delta 1.0 - 4.0
Theta 4.0 - 8.0
Alpha 8.0 - 12.0
Beta 12.0 - 25.0
High Beta 25.0 - 30.0
Beta 1 12.0 - 15.0
Beta 2 15.0 - 18.0
Beta 3 18.0 - 25.0
Power Ratios Enter this reward frequency range in EEGer Plan Session
Delta / Theta 1.0 - 4.0
Delta / Alpha 4.0 - 8.0
Delta / Beta 8.0 - 12.0
Delta /High Beta 12.0 - 25.0
Theta / Alpha 25.0 - 30.0
Theta / Beta 12.0 - 15.0
Theta / High Beta 15.0 - 18.0
Alpha / Beta 18.0 - 25.0
Alpha / High Beta 35.0 - 37.0
Beta / High Beta 27.0 - 39.0
Valid sites (all referenced to A1 or A2):
FP1 F7 C4 O1 T5
FP2 F8 CZ O2 T6
F3 FZ P3 T3 PZ
F4 C3 P4 T4
Review Options:
EEGer Review includes additional options for viewing data from sessions recorded using a Z Score reward mode.
Files can be exported in EDF+ format for analysis in ANI's NeuroGuide or other software that can import EDF+ format.
Z Score Training Display
Layout: The Reward Only layout may be used for Z Score training if you do not want to use inhibit bands.
Site and Frequency Settings: When a Z Score feedback mode is selected for training, EEGer checks the selected site(s) and frequency against the available Z Score options. A message is displayed for invalid site(s). There must be two channels of EEG data for some of the options. For frequency, the Reward band is adjusted to the closest valid Z Score range.
Feedback Mode: To change the feedback mode, press Shift+F3. Use the arrow keys to move to the desired mode and press + to activate. EEGer must confirm the sites and frequency again if a Z Score mode is selected.
Reward Mode: Z Score training is performed with the down training reward mode (Down).
To change the reward mode, press F2 to cycle through the options.
Z Score Feedback Display
Press F12 on the EEG training screen to cycle to the Z Score display (available only if Z Score is installed and working). This display shows the standard deviation values in real time for the various ANI outputs. Up values are positive deviations. The graph is limited to +/- 5 standard deviations. The horizontal lines represent two standard deviations from the mean. Channel A values are on the left, Channel B values on the right and the three bottom graphs display values for modes that combine Channel A & Channel B readings.
Z Score Review Display
