According to the textbook's culture and human behavior box titled "culture and the muller-lyer illusion: the carpentered-world hypothesis," research using the illusion has enabled researchers to demonstrate that culture may shape perception.

The answer is "Müller-Lyer illusion".

The Müller-Lyer illusion is an optical illusion comprising of an arrangement of lines that end in sharpened stones. The introduction of the sharpened stones influences one's capacity to precisely see the length of the lines. Like most visual and perceptual dreams, the Müller-Lyer illusion enables neuroscientists to ponder the manner in which the cerebrum and visual framework see and translate pictures. Craftsmen have likewise used the hallucination to extraordinary impact in their works.

tbh idk same thing here