Although the Indian criminal justice system is adversarial in nature, where the decision-making responsibilities are limited to the judges panel, there exist other federal systems where such responsibilities are shared between the body of jurors and the judge(s). This chapter encapsulates the existing literature from experts from different jurisdictions and legal systems that enlist the factors that can influence the cognitive decision-making functions of a body of jurors. We briefly discuss the psychological influences that are likely to be present at various stages of a criminal trial and how it may affect the jury, and what can be done to consciously avoid these prejudices.