Answer:
of who you are
Explanation:
The correct completion of this sentence would be the following...
Without a better understanding of who you are, where's the value?
This is because the psychologist is referring to the test itself in the statement that he is making. The test is basically telling you what you already know, therefore unless you somehow manage to truly learn something new about yourself with the test, it provides you with absolutely no value. This is what the psychologist is stating as a disappointment.
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