McMaster University Psychology Department
SUBJECT INSTRUCTION
SHEET
Kelly Strode
P.I. Contact
Number: 525-9140
ext. 24367 Contact Number: 525-9140 ext.27565
Please keep in mind the following instructions while
completing this experiment:
1)
You
will be riding on a stationary “VR” bicycle through a “virtual” hallway and
asked to make distance judgements. The experiment involves completing 5 blocks,
each consisting of 48 trials. At the beginning of each block, there are ten
trials with equal virtual distance of 100 (arbitrary unit). This will serve as
the distance that you must use as the reference to make judgements for
subsequent trials. The experimenter will inform you when these trials are over.
The next 38 trials are the test trials, with both distance and “perceived”
speed being random. Perceived speed is manipulated randomly so that although the speed you pedal could remain the
same, the software will adjust how fast you are going in the virtual
environment. You will always be informed when the next block has begun, and
when the reference trials have finished.
2)
You
will then be required to ride through the hallway and tell the experimenter
what percentage of the “reference distance” you just traveled The distance you
have traveled is defined from your starting position to the time you hear a
“click”. When you hear the “click”, you must stop pedaling and tell the
experimenter what percentage of the reference distance you have traveled (from
0-100%). To start the next trial, simply press the brakes on the handlebars,
and you will return to your next starting position.
3)
While
riding the stationary bike, please pedal at a constant speed (to the best of
your ability) throughout the entire experiment.
4)
You
will be reminded of these instructions throughout the task.