This is a common topic for MovALyzeR and ScriptAlyzeR. Both programs will be referred to as MovAlyzeR on this page.
o You will need to login with Adminstrator privileges on WinNT/2000/XP and later systems.
o The Wintab driver should be installed according the manufacturer's instructions. In general, the following steps can be followed:
~ First uninstall (e.g., Double click My Computer > Control Panel > Add/Remove Programs) any existing Wintab driver version, disconnect any old digitizer, power down the PC, start the PC, power down the PC again.
~ Connect the new digitizer via USB or COM port. When you connect, your system may discover new hardware.
~ Use the "have disk" option if you have an installation disk or start the driver install program downloaded from the tablet manufacturer's website (first open it to unzip the actual install program). Then follow installation instructions. It is recommended to store the downloaded install file for future reference.
o If install fails you may need to manually delete wintab32.dll in your \windows\system\ or \winNT\system32\ directory.
o If troubles persist, contact your digitizer manufacturer or see Trouble Shooting.
o To adjust the settings, go to the tablet properties. Usually, by clicking Start > Settings > Control Panel > Digitizer or pen tablet (e.g., Wacom Tablet) > properties.
o Mode affects the sampling rate constancy (first most important) and height (second most important). Rates of about 100 Hz (e.g., 50 - 200 Hz) are acceptable. Standard mode is recommended.
The following settings should be used in the driver properties.
- Set entire Tablet is mapped
- Set entire Display is mapped
- Set scaling To Fit
- Click ok to save
- Minimize all the application windows
- Place the pen on the bottom left corner of the tablet. (The tablet cursor should point to the bottom left corner of the monitor.) Move the pen over the tablet to the top right corner. (The cursor should now correspond to the top right corner of the monitor.)
Note: If any of the above mentioned options are not available for your tablet, contact Neuroscript with tablet specifications to find out about alternatives.
Any kind of tablet size mapping should be performed from within the MovAlyzeR program. (Refer this section on help)
2. Sampling Rate and Pen Pressure
o Differences between using the mouse and digitizer pen are:
|
Data |
Mouse |
Pen |
|
Position |
Neglects mouse movements in the air |
Absolute position on tablet |
|
Direction |
Depends on the mouse orientation |
Depends on tablet orientation |
|
Pressure |
0 (when mouse button is released) or 99 (when mouse button is pressed) |
Continuous range from small (when the pen is lifted), to values higher than the Minimum Pen Pressure (when the pen is pressed) |
|
Low, and falls to 0 when not moving the mouse |
High, and constant | |
|
Handwriting |
Awkward |
Natural |
|
Hardware requirements |
No new equipment needed other than a high-quality (optical) mouse |
Requires digitizer |
The use of Wintab precludes the selection of particular sampling rates. The sampling rates are, however, known and constant per setting. The actual, instantaneous sampling rate is shown while recording. For Wacom GD digitizers the following results are available.
o The actual sampling rate can be measured from Settings > Testing Input Device. Refer to Test/Record input device.
The temporal accuracy does not necessarily improve with higher sampling rates as segmentation interpolates between successive sampling points.
| Setting >Select Input Device | Device actually used | Wacom Tablet Properties >Connection Mode=Standard (RECOMMENDED) |
Wacom Tablet Properties >Connection Mode=Recognition Data | Constancy of Sampling Rate | Pen Pressure Data |
| Pen | Pen | 100-130 Hz | Max 200 Hz (*) | Sampling rate constant while pen is in proximity of the tablet | P = 0 - tablet max |
| Pen | Mouse | N/A | N/A | N/A | N/A |
| Mouse | Pen | 60 Hz | Max 100 Hz (*) | Sampling rate slows while pen is not moved | 0 or 99 (if left switch pressed) |
| Mouse | Mouse | 40 Hz | 40 Hz | Sampling rate slows while mouse is not moved | 0 or 99 (if left switch pressed) |
(*) The Recognition Data mode may offer the highest sampling rate but the isochronous sampling seems to be better in the Standard mode and is therefore prefered.
o This property should be adjusted if you have a digitizer with a pen and you want to use the pen as mouse.
o Pen switches can be set to perform all mouse functions.
|
Pen Function |
Mouse Function Equivalent |
|
Press pen tip |
Click |
|
Double press |
Double click |
|
Upper pen switch: Switch 2 |
Double click |
|
Lower pen switch: Switch 1 |
Right click |
|
Move while pressing |
Move while clicked (dragging) |
o IMPORTANT. Disable pen barrel switch to prevent problems when subjects unintentionally press the pen barrel switches during recording.
o The double-click distance and speed may need to be adjusted to allow double-clicking with the double pressing the pen instead of Pen Switch.
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