Final answer:
The two APA ethical principles not delineated in the Belmont Report are 'fidelity and responsibility' and 'integrity'. These principles emphasize establishing trust, upholding professional standards, and promoting honesty in psychology.
Step-by-step explanation:
The Belmont Report outlines three core ethical principles which are respect for persons (autonomy), beneficence, and justice. It was developed to ensure ethical research involving human subjects. However, the American Psychological Association (APA) includes two additional principles that are not specifically delineated within the Belmont Report: fidelity and responsibility, and integrity. These principles demand that psychologists establish relationships of trust with those with whom they work, uphold professional standards of conduct, and promote accuracy, honesty, and truthfulness in the science, teaching, and practice of psychology.