In the situational theory of leadership, some of the philosophers and the researchers realised that a person can still be a leader if the universal leadership behaviours or traits are not reflected by him/her. This thought eventually led to the development of the situational theory. It was emphasised by this theory that from situation to situation, the leadership within a person can change significantly.

This is the key reason due to which failures may be faced by some leaders in some situations. Moreover, this theory also proposes that the perfect action course is selected by the leaders based upon the different situational variables. For specific kinds of decision-making, different leadership styles may be appropriate more. For instance, the authoritarian style may be the most suitable one in a scenario where the leader is the most experienced and knowledgeable group member. On the other hand, democratic style may be more efficient in the case where members of the group are skilled experts.

The behavioural theory is one of the next stages in the development of the theories of leadership. Instead of the inborn traits of an individual, the behaviour or the leadership style is mainly focused on this theory. In comparison to the social, physical or mental characteristics of the leaders, the behaviours are mostly focused on this theory.

Thereby, the factor that influences the relationship between the particular human behaviours from leaders was measured by the researchers through the evolutions in psychometrics, especially the factor analysis. In particular, it has been emphasised by this theory that a positive influence will be imposed on the efficiency of the followers by the behaviours of leadership. Instead of the internal states or mental qualities, the actions of the leaders are mostly focused on this theory of leadership that is rooted in behaviourism. As per this theory, through means of observation and teaching, individuals can learn to become leaders. Leaders are mostly categorised into two types by the behavioural theory, that is, those who are concerned with the followers and those who are concerned with the tasks.