Spiders cannot sense fear in humans. They do not have the cognitive ability to understand or detect human emotions like fear. However, spiders can detect vibrations and movements, which might make them react if a person moves suddenly or erratically.
Spiders rely on their senses to navigate their environment and hunt for prey. They use their legs to feel vibrations in their webs or on surfaces, which helps them detect potential threats or prey. If a person is afraid of spiders and moves quickly or tries to swat at them, the spider might sense the movement and react by fleeing or, in some cases, biting as a defensive measure.
In summary, while spiders cannot sense fear, they can detect movement and vibrations, which might cause them to react if a person behaves in a way that startles them.