Right! Psychodynamic theory is the hardest to test because it bases its theory on subconscious constructs that cannot be directly or even indirectly observed. Without observations that can be objectively evaluated, we cannot test a theory. Right! Psychodynamic theory is the hardest to test because it bases its theory on subconscious constructs that cannot be directly or even indirectly observed. Without observations that can be objectively evaluated, we cannot test a theory.