In 1959, French and Raven described five bases of power:
1. Legitimate – This comes from the belief that a person has the formal right to make demands, and to expect others to be compliant and obedient.
2. Reward – This results from one person's ability to compensate another for compliance.
3. Expert – This is based on a person's high levels of skill and knowledge.
4. Referent – This is the result of a person's perceived attractiveness, worthiness and right to others' respect.
5. Coercive – This comes from the belief that a person can punish others for noncompliance.
Six years later, Raven added an extra power base:
6. Informational – This results from a person's ability to control the information that others need to accomplish something.
In the scenario, Neville attracts and keeps good relationship with his colleagues not because of neither position nor reward nor coercion. He has good skills and kindness, which increase his charisma. His source of power is referent power.
[Reference:, CIPS study guide page 47-50, French and Raven's Five Forms of Power, , , ]