4.7. Beanbag

The beanbag is a body-support mattress that adjusts to individual participant's body shapes. This helps to minimize the participant's body movement. It is not routinely used now that there is a soft mattress. However, should you need to use it, you should know the following:

  1. The air inside the beanbag can be put in by pressing the valve, or taken out using the air pump.
  2. The beanbag must be flattened out after each participant.