Understanding Psychic Determinism

The question asks for the psychological principle stating that all mental events have a cause and nothing in the psyche occurs randomly.

Principle Explained

This principle is known as Psychic determinism. It posits that every mental process, whether conscious or unconscious, is determined by prior causes. Events like thoughts, feelings, memories, and actions are not accidental but are the result of preceding psychological occurrences.

Evaluating Options

• Psychic determinism: This directly matches the definition given in the question, asserting that all mental activities stem from prior causes.
• Overdetermination: This concept, often discussed in psychoanalysis, suggests that a single event or symptom can have multiple, sometimes unconscious, causes rather than just one. While related to causality, it's not the overarching principle that *all* mental activities have a prior cause.
• Pleasure Principle: This principle refers to the drive to maximize pleasure and minimize pain, often associated with the id's immediate gratification demands. It doesn't encompass the idea that all mental activities are determined by prior events.
• Reality Principle: This principle describes how the ego balances the id's desires with the constraints of the external world, often involving delayed gratification. It's a specific mechanism, not the general principle of causality for all mental events.

Conclusion

Based on the definition provided in the question, Psychic determinism is the correct principle.