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There is no way to prevent the development of a phobia, and without treatment, they are unlikely to go away in adults. If a person has a previous unpleasant or traumatic experience with a spider, this may cause arachnophobia to develop. In addition, if a person grows up in an environment where their parents are scared of spiders, this may become a learned behavior, and the child could also develop the same fear. For example, the media often depicts spiders as scary and potentially dangerous. Social theoriesĪnother theory is that people’s fear of spiders is learned. Upon seeing the pictures of spiders and snakes, the infants’ pupils dilated, which indicated their fear responses had activated. Researchers presented a group of 6-month old infants with images of flowers, birds, spiders, and snakes.

One study tested this to see if arachnophobia is inherent in our nature. Some of these are: EvolutionaryĮvolutionary theory suggests people develop arachnophobia due to an evolved preparedness in dealing with potential threats. Although there is no single trigger for arachnophobia, there are theories that suggest why it might develop. Specific phobias, such as arachnophobia, tend to develop in childhood.