Kelly Grid is defined as a technique drawn from Personal Construct Psychology devised by Psychologist George Kelly which was used to understand the way in which an individual employs his/her own experience in order to make sense of the world. Kelly Grid also known as a Repertory grid identifies and maps the interactions between the key ideas, themes or constructs that a person uses. These constructs can often be employed to rate or describe brands or organisations in a market research context. This is an individual technique and does not work well in groups.