I believe the answer is <span>consciousness
From the description above, Dr. Sim is studying the part of the thought process that we conducted <em>on purpose</em>.
If Dr. sim studies activities thought process such as dreaming and how our perception is formed, we can conclude that Dr. Sims is studying the thought process that we conducted without our awareness or Sub-consciousness.</span>
You must be voted in by citizens or any type of voting party
The answer is D: they have a similar range of personality characteristics as do those in general population without down syndrome