Operational definitions are instrumental in determining the exact process by which research data should be collected and processed. Because operational definitions outline how data will be measured, ...

7 Australian Centre for Research into Injury in Sport and its Prevention (ACRISP), Federation University, Ballarat, Australia Concussion is the number one injury risk in contact and collision sports.

Correspondence to Dr Kenneth Lincoln Quarrie, High Performance Unit, New Zealand Rugby, 100 Molesworth Street, Wellington 6140, New Zealand; ken.quarrie{at}nzrugby.co.nz The Zürich Consensus Statement ...

1. Why do you need an operational definition when you already have a perfectly good conceptual definition? In your conceptual definitions you explain what your constructs are by showing how they ...