Answer:
The test participants reveal little surprising characteristics about themselves.
Step-by-step explanation:
The question presented above shows a text that presents two ideas. These ideas are the results of the tests that the participants were subjected to and the unsurprising characteristics that these results reveal.
To bring these two ideas together in a single sentence, we must present the main points of these two ideas. In this case, we can say that the test participants revealed their characteristics, but they were not surprising. This can be presented by the sentence: "The test participants reveal little surprising characteristics about themselves."