Carpentered World Theory on Visual Illusions Falls Apart — What Thai Readers Should Know
New analyses and replication attempts have cast serious doubt on the long-standing “carpentered world” explanation for why people perceive certain visual illusions differently across cultures, forcing scientists to rethink how environment, experience and culture shape vision. Once widely taught as a clear example of cultural influence on perception — the idea that people raised in rectangular, “carpentered” built environments are more susceptible to line-length illusions — the hypothesis now appears overstated, methodologically fragile and unable to account for the full pattern of results seen across global and modern populations. For Thailand this means re-evaluating assumptions used in education, design, public health messaging and cross-cultural psychology research, while urging larger, locally led studies that reflect the country’s urban-rural diversity and rich visual traditions.