You are invited to take part in a study that investigates change detection in moving visual displays, with a $75 gift card for participation.

This study uses a technique called magnetoencephalography or “MEG” to investigate brain activity while you do a task. MEG is a purely passive and non-invasive brain measurement technique. We aim to find out what is happening to brain activity when people see motion. You will be invited to complete a behavioural session (one hour), and then, if you are eligible based on this session, we will invite you to participate in the MEG session (three hours).

You are under no obligation to participate and can withdraw your participation at any point. If you withdraw, you will receive reimbursement for the session you completed.

In the behavioural session, you will sit in front of a computer monitor, resting your chin on a chin rest and responding to visual shapes using buttons. In the MEG session, you will lie down in a magnetically shielded room and respond to visual shapes using buttons. We will also use a non-invasive eye tracker to track your eye movements throughout the tasks during the behavioural and MEG sessions. This procedure is not harmful and allows us to know where you were looking on the monitor throughout the tasks.

The behavioural session will take up to one hour to complete and the MEG session will take up to three hours to complete, for a total of four hours study participation.

The behavioural and MEG sessions can occur on separate days.

To be eligible for this study, you must:

• Be 17+ years of age
• Have normal or corrected-to-normal vision and if corrected, able to wear contact lenses for MEG session
• Not have any non-removable metal implants (including non-removable metal dental implants, cardiac pacemaker, pacing wires of artificial heart valves, hearing aids, cochlear/ear implant, ocular/eye implant, other surgical implants above waist level (eg screws, plates, rods, shunts, artificial joint), non-removable jewellery (eg rings, body piercings)
• Not have claustrophobia or other anxiety disorders
• Not have a diagnosis of epilepsy
• Experience no other factors that would prevent you from being able to lie in the MEG for an hour (eg back pain when you lie down, difficulty staying still).

If you are interested in participating in this study, email Tabea-Maria Haase: tabeamaria.haase@hdr.mq.edu.au

_{Ethics approval number: 520231193150094}