Nurmohamed conducts a series of studies to examine the underdog effect. Interestingly, perceiving oneself as the underdog doesn't always help us. Nurmohamed finds that underdog expectations can have a beneficial impact on performance. However, the research shows that it depends on the perceived credibility of those observing and judging one's abilities. If the outsiders' credibility is high, then underdog expectations have a negative impact on performance. However, when outsiders' credibility is perceived as low, then underdog expectations have a positive effect on one's performance.