Thought Technology Ltd. Z-Sore Mini-Suite Lessons 1-4 Course notes Online Course.

Thought Technology Ltd.

Z-Sore Mini-Suite

Lessons 1-4Course notes

Online CourseOnline Course


Topics Covered in Lessons 1-4:

Lesson 1-4Lesson 1-4

1. Overview real-time z-score neurofeedback

and installation of Z-Score Add-on

2. Using Z-Score Assessment functions

3. Training with real-time z-scores

4. Training, continued, using Favorites and other

methods for efficient training


Questions

• A Z-score measures the deviation of a measured value from the mean of a set of previously measured values (or norms)

• It is reported in multiples of standard deviation of that set:

Z-score Definition

Z = measured value – meanZ = measured value – mean standard deviation standard deviation

Z-scores approximate a Gaussian distribution

From: SENSITIVITY ANDSPECIFICITY OF AN EEGNORMATIVE DATABASE:Validation and Clinical Correlation(see also J. Neurotherapy 7(3/4): 87-121, 2003)R.W. Thatcher, Ph.D., R.A. Walker, B.A.C.J. Biver, Ph.D., D. M. North, M.A. and R.Curtin, B.A.

Z-score Biofeedback

• Z-score biofeedback: online comparisons to Thatcher’s normative database

• Simplify feedback by training on z-scores instead of metrics, or…

• … train on metrics and analyze deviations from norms post-season (in replay or review mode)

• Analysis: trend Z-scores over session, report percent of time in condition for each metric or percent of metrics in condition at any given time.

“Traditional” or z-score neurofeedback?

Traditional:Training the brain against itselfUsing specific protocols or tasks to boost performanceSome conditions have shown documented success using specific protocols

Z-score:Seeks to increase efficiency in the brain compared to an established meanProvides a foundation for connectivity training More objectively allows for developmental factors

Lifespan EEG Normative Database

• N= 625• Ages 2 months to 82 years• Eyes open, eyes closed• An uneventful prenatal, perinatal and postnatal period. • No disorders of consciousness. • No head injury with cerebral symptoms. • No history of central nervous diseases. • No convulsions of emotional, febrile, or other nature. • No abnormal deviation with regard to mental and

physical development.

Z-score and Neuroguide

• The Z-score algorythm functions by taking a client’s data measure and comparing it to a database, called Neuroguide.

• The database compares the client’s value to a mean value from a similar population based on:– The data measure

– Sex of the client

– Age of the client

• The algorythm expresses the client’s data measure as a difference from Neuroguide’s mean value for that similar population, in units of standard deviation.

Electrode sites Eyes open or eyes closed

Bands:Delta 1-3.5 HzTheta 4-7.5 HzAlpha 8-12 HzBeta 12.5-25 HzHi Beta 25.5-30 HzBeta 1 12-15 HzBeta 2 15-17 HzBeta 3 18-25 Hz

Metrics:•Absolute amplitude•Relative Power•Ratios (10)•Coherence•Asymmetry•Phase

Output values for 2 channels: 72



PowerPower

16 values absolute power16 values absolute power

16 values for relative power16 values for relative power

20 values for ratio training20 values for ratio training

ConnectivityConnectivity

8 values for asymmetry8 values for asymmetry

8 values for coherence8 values for coherence

8 values for phase8 values for phase


PowerPower

32 values absolute power32 values absolute power

32 values for relative power32 values for relative power

40 values for ratio training40 values for ratio training

ConnectivityConnectivity

48 values for asymmetry48 values for asymmetry

48 values for coherence48 values for coherence

48 values for phase48 values for phase

Concepts of z-score neurofeedback

Installation of Z-Score Add-On

Auto-run window for the Z-score installation cd.


• If Z-score screen is used, without installation of Z-score add-on, the Z-score related instruments will not function.

BIOFEEDBACK FOUNDATION OF EUROPEThe Foundation for Learning


• If Z-score screen is used, without installation of Z-score add-on, the Z-score related instruments will not function.



Click “View Click “View installation installation instructions” instructions” link to open link to open pdf pdf instructions instructions for the for the installation installation procedure.procedure.


• Installing – Basic Steps (nothing difficult)


• Installing – Security Keys

Send a copy of Security Key A to

[email protected]


• Installing – Security KeysOnce the email has been sent,

press the “Cancel” button in the installation. Installation

cannot continue without Security Code B


• Installing – Security Keys

Once you have received Security Key B, run the installation cd again. Go through the same steps. When the software asks for security key B, enter the code correctly and the installation will be complete

Selecting the training location

Getting Started with the Software

Double click on the white “Biograph Infiniti” Double click on the white “Biograph Infiniti” icon to start the Biograph Infiniti.icon to start the Biograph Infiniti.



Check the basic settings: Check the basic settings:

Options menu Change

Temperature

Options menu Notch Filters

EEG EKG EMG 50Hz or 60Hz

Getting Started with the SoftwareGetting Started with the Software

Check the basic settings: Check the basic settings:

Options menu Show/Hide

File names


Replaying a Session

““Start Open Display Start Open Display Session” is for Session” is for recording new sessions recording new sessions with clients.with clients.

““Database” is for Database” is for reviewing and reviewing and replaying previously replaying previously recorded session.recorded session.

We will replay a We will replay a session, so select session, so select “Database” “Database”

• Select a client and then select a session

• Click the “Replay Session” button to replay the chosen session

• Select screens to replay session by clicking the “Select Screens” button.


Replaying a Session

• Choose up-to 5 screens for the replay. – Hold “Ctrl” key and left-click with the mouse to

select multiple screens.– Click “Ok” when done.

Replaying a Session

• Click “Ok” now that the screens are chosen for the session replay.


Replaying a Session

• The main replay window

• Begin recording session

Select length of time display

Choose which screen to view

Stop recording session

Pause session replay

Replaying a Session

Basic session controlsBasic session controls

Replaying a Session

• A different screen displays a completely new screen.

Replaying a Session

• To check what virtual channel (computation) an instrument represents:– Right-mouse click on the instrument– Select the “Show connected channel(s)” option


Replaying a Session

• A small window will appear, displaying the channel(s) connected to the instrument.


Replaying a Session

• Changing thresholds– Left-click on the threshold-line of the instrument– Hold down the left-mouse-click while moving the

threshold line to a new value.

Assessment

Designing effective treatment

QEEG Irregularity

Intensity/priority

Applicability of TX Assessed issues

Symptoms

AND: No Contraindications (e.g. unaddressed medication or physical issues, client consent, ability to complete treatment, etc.)

Completing an assessment

ReportingSelect a recorded file and press Review/Report to load report screens

ReportingThe Mini Suite comes with a variety of report screens to aid analysis

ReportingPower Z-scores with absolute amplitudes

Training Goals• Establish training goals with the client

– Which part of the brain will be trained?• qEEG directed or symptom directed or both

– At which frequency?– The duration

• Inhibit or Reward

• Coach and Motivate

• Create an environment that encourages improvement

• Metacognitive Strategies– Metacognitive Strategies (used since 1975) = awareness of how you learn; thinking about thinking; become aware of how

you learn; what you know about what you know; strategies about learning (MT).

Potential training strategies

• Full z-score feedback (all metrics)• Grouped Z-score training (selected groups

--connectivity or power)• Individual metric training (up or down)• Performance-based training with z-score

components

Training “tasks”

• Animation with full metric training• Animation with groups of metrics• Individualized animations• Site-based training• Other tasks, DVD, games

(problems/benefits)

Threshholding

• Common strategies to maximize success (sometimes, never, always)

• How much success does one need?• Adjusting standard deviations• Adjusting percentage of time one is

successful

Additional References

Collura, T. F. (2008). Whole-head normalization using live Z-scores for connectivity training, Part 1. NeuroConnections Newsletter, April 2008, 12, 15, 18-19. San Rafael, California; ISNR

Smith, M. (2008). A father finds a solution: Z-score training. NeuroConnections Newsletter, April 2008, 22, 24-25. San Rafael, California; ISNR

Thatcher, R. W. (2008). Z-score EEG biofeedback: Conceptual foundations. NeuroConnections Newsletter, April 2008, 9, 11, 20. San Rafael, California; ISNR

http://www.isnr.org/newsletters.cfm



Training Options

Thought Technology Ltd. Z-Sore Mini-Suite Lessons 1-4 Course notes Online Course.

Documents

Transcript of Thought Technology Ltd. Z-Sore Mini-Suite Lessons 1-4 Course notes Online Course.