Dread can change the way the mind works, with the process of neuroplasticity, just as focusing on the positive can change the way the mind works. Voodoo works, because people believe in it and it changes their expectatations and motivations in life.
If you tell me you are going to place a spell on me, and I consider it real, I maystart to experience dread, and make choices in life that I wouldn't normally make; in this case the spell has a real effect, but it is the result of a self fulfilling prophecy, because of a change in thought process and state of mind.
It works the same with religion, if one gains a sense of hope, it doesn't matter what the source is, it is always better than a sense of dread, hope, leads to a better state of mind, and positive choices in life. Dread, in general paralyzes human beings restricting what they might accomplish in life.
Psychology is real. Hope and dread is real. And if one believes in Voodoo it can produce real changes in the mind from dread, as religion also does for those that believe in it, receive benefit from it, and gain hope through it in their life.
The only way to measure it is through self report. In both cases research that provides evidence from self reports suggest that there can be a positive psychological impact from religion and a negative psychological impact from VooDoo.
Some like to think that religion is the same thing as VooDoo. That's fine, but the psychological benefits are often different from what is experienced by those that believe in VooDoo. At, least that's what the research suggests.
This is the part that has been measured. As to the parts that can't be measured; I don't establish myself as an authority on personal experienced phenomenon that can't be measured, because unless I personally experience something that can't be scientifically measured, I can't possibly provide a 100% correct judgement on the factors that may influence someone elses experience of reality and whether or not it is beyond the normal experience of what most people consider reality.
Science now suggests that all our realities are shaped differently by our experiences and genetic makeup, so I think if someone uses science as an objective means of determining what approach to take in life, this is the most reasonable approach to take on phenomeon in other people's lives that we don't share and fully understand.
If I keep a closed mind to the experience of others that I dont agree with, I can't possibly hope to understand much about the lives of others, except for what I personally experience.
I knew a Jamaican guy that would not have anything "spooky" in his house, because of his personal understanding of VooDoo. The old saying hear no evil, speak, no evil, see no evil, applies here, in that if one does not add what they see, hear, or speak as negativity in their life, they consume a mental diet richer in positive audio, visual, and interactive stimuli, that comes together to make them who they are now and in the future.
It was a cultural teaching for him, the Jamaican people are rated among the people in the world that are the happiest, with the greatest sense of self esteem. They must be doing something right.