The first aspect is one’s power of expression. In a group discussion, a candidate has to talk effectively so that he is able to convince others. For convincing, one has to speak forcefully and at the same time create an impact by his knowledge of the subject. A candidate who is successful in holding the attention of the audience creates a positive impact.
It is necessary that you should be precise and clear. As a rule evaluators do not look for the wordage produced. Your knowledge on a given subject, your precision and clarity of thought are the things that are evaluated. Irrelevant talks lead you nowhere. You should speak as much as necessary, neither more nor less. Group discussions are not debating stages.
Ability to listen is also what evaluator’s judge. They look for your ability to react on what other participants say. Hence, it is necessary that you listen carefully to others and then react or proceed to add some more points. Your behavior in the group is also put to test to judge whether you are a loner or can work in a group.
You should be able to convey your thoughts satisfactorily and convincingly before a group of people. Confidence and level headedness in doing so is necessary. These add value to your presentation. In case you are not good at it, you might gain by joining an institute that offers specialized courses in public speaking.