I am a bit confused
- It has been believed that people who read have developed better imagination
Is it still believed or is no longer believed? Is it closer to "it is believed" than "it was believed"?
- It might have been believed they have developed better imagination.
Is there a possibility of being believed now? Is it related to the present? Is " it might be believed the opposite in terms of time?
Is present perfect continuous usable? Or is just a grammatical structure?