Based on the excerpt you're referencing, the most appropriate idea that the evidence supports seems to be: Psychiatrists were trying to stop information about their practice at the asylum from reaching the public.
This conclusion is typically drawn from situations where practices are hidden or patients are not properly cared for, indicating a desire to prevent negative exposure. However, without the specific text, this deduction may vary. If you have particular lines or content from the article that you can share, I can provide a more tailored answer!