Randomisation - GCSE Psychology Definition

Randomisation in psychology is a method used to ensure fairness and reduce bias in experiments. It involves organising participants or items in a random order, which means everyone or everything has an equal chance of being chosen or placed in any group. This can be like flipping a coin or drawing names from a hat. By using randomisation, researchers can make sure that any differences between groups in an experiment are due to the treatment or condition being tested, and not because of any pre-existing differences between participants. This helps to make the results of an experiment more reliable and valid.