Visual Manual Instructions

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Visual-Manual Instruction Sequence

Visual-Manual
You have selected the Visual-Manual task.
Press 'Next' to receive further instructions.

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Visual-Manual Instruction Sequence

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Step 0: Straighten Head on Shoulders
You will observed a ball floating in a black sky through a halo.

Look straight ahead with your head aligned with your body axis.
Tilt your head in pitch and yaw until the ball turns green.
Tilt your head in roll until the halo turns bright green.

When the ball and halo are green, press the Select Button to
start.

Visual-Manual Instruction Sequence

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Step 1: Straighten Head
If the halo is red you must reorient your head:

Look straight ahead then slowly tilt your head on your
shoulders. This will make the halo turn progressively from red to
green:

When the halo pops to bright green, hold this position.

Visual-Manual Instruction Sequence

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Step 2: Acquire the Target Orientation
Once your head is aligned with your body (i.e. when the halo is
bright green), a set of parallel bars will appear at the end of the
tunnel, representing the target orientation.

Memorise the target orientation.
Note: Your hand must remain in the neutral position on your lap
throughout the target presentation. Please do not align your hand
to the target orientation during target presentation or during the
memory delay period.

Visual-Manual Instruction Sequence

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Step 3: Tilt the Head
If the halo turns red, you must tilt you head to a new orientation.
The arrow tells you which way to rotate the head.

Roll your head slowly in the indicated direction until the halo
turns bright green and hold this position.

Visual-Manual Instruction Sequence

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Step 4: Align to Target
When the orange disk reappears, raise your arm and aim with
the hand until the virtual laser pointer falls on the disk. Rotate
your hand in a rolling motion around the axis of your arm to the
remembered target orientation.
Note: In this phase the virtual tool gives no indication about the
orientation of the hand around the roll axis. You must rotate the
hand to the remembered orientation while pointing to the target
in azimuth and elevation.

With your left hand, press the Select Button on the VR
Headset Remote to validate your response once you think your
hand is aligned with the memorised target.

Visual-Manual Instruction Sequence

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Step 5: Check Response
In some of the trials a line of balls will be projected from your
hand towards the targets, allowing you to verify whether or not
you correctly aligned your hand. On other trials you will see
only a single spherical projectile without any indication as to
whether your hand was correctly aligned to the memorised
target orientation.
A green sphere appears briefly if the task sequence is
completed correctly, regardless of the accuracy of the hand's
alignment to the target.
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