What aspect of psychology does professional standards primarily address?

The correct option highlights that professional standards in psychology primarily focus on ethical guidelines for psychologist conduct. These guidelines serve as a foundational framework that psychologists must adhere to in their practice. They are designed to ensure the integrity of the profession, protect client welfare, and maintain public trust in psychological services.

Ethical guidelines cover a wide range of areas, including the necessity for psychologists to avoid conflicts of interest, maintain confidentiality, and ensure informed consent. By following these standards, psychologists can navigate complex situations that may arise during practice while upholding their professional integrity.

The other aspects mentioned, such as client engagement techniques, legal obligations, and therapeutic outcome measurements, are important components of psychological practice but do not encapsulate the overarching purpose of professional standards as comprehensively as ethical guidelines do. Client engagement techniques and therapeutic outcome measurements focus more on the methods and effectiveness of therapy, while legal obligations refer to statutory requirements which, while important, are distinct from ethical considerations inherent in professional conduct.