Determinism is a necessary and regular dependence of mental phenomena on the factors that generate them. There are several forms of determinism: systemic, feedback, statistical, target, and other sets of circumstances that precede the investigation in time.
The development of forms of determinism is associated with the development of scientific knowledge of the psyche. For a long time it was based on mechanical determinants, which were mental phenomena caused by the operation of technical devices. This view is somewhat limited, but despite this fact, it was it that gave impetus to such psychological teachings as the study of affect, reflexes, associations, and so on.
Darwin's teachings
Biological determinism is the behavior of living systems. This form appeared in the middle of the XIX century. and affirmed the view of the psyche as a necessary function for the survival of all living things. Mechanical determinism represented the psyche as a side effect. The biological form believed that this is a necessary component of life.
Psychological determinism
Subsequently, when this component received an independent causal value, determinism arose in psychology. The incorporation of the ideas of natural-scientific determinism into psychology led to its isolation in a separate field of knowledge engaged in the study of processes subject to its own laws.
Thanks to the philosophy of Marxism , a new form of determinism was developed, in accordance with which the activities of people are based on their lifestyle. This has contributed to the emergence of methodological prerequisites for the implementation of the principle of determinism at the level of psychosocial organization of human activity.
Determinism concept
All events occur, for some reason. For example, the choice of toys for boys is likely to be associated with a high content of male hormone in their blood. However, this is not the only reason for this behavior. This definition is called psychological determinism. This implies that the psychological factor is due to some reasons or previous circumstances. But in many situations it can be difficult to determine what caused a particular phenomenon. Although the fact that one incident occurs first, and then another, does not mean at all that the second incident occurred as a result of the first. That is, "after this" is not synonymous with "because of this."

All actions and thoughts of man have a reason. Identifying the causes of our actions and thinking are engaged in psychology experimenters. In most cases, this is a very difficult task, but, nevertheless, it only inspires them to search, as Galileo once grasped the assumption that gravitational force is the cause of equal speed when balls of different weights fall on the ground. These studies are based on the postulate that determinism is the discovery of the causes that lie behind every human thought and action.