sometimes constant movement from one place to another for job opportunities or immigration, it is very common for people to carry these items with them. People may look to these objects for emotional support during transitional periods, such as assimilating to a new area, or when experiencing trauma or a significant loss. Cross-cultural uses Researchers have observed that the incidence of attachment behavior toward inanimate objects differs depending on the culture in which the infant was raised. It is suggested that infants' attachment to inanimate objects would be less frequent in societies in which in an infant may spend most of the day in close contact with their mother. In particular, in Western countries object attachments were indeed found to be common, with rates reaching as high as 60%. In a study conducted by Michael Hong, it was found that around 50% of American children and only around 20% of Korean children developed an attachment to a blanket or an equivalent type of primary transitional objects. A similar study by Renata Gaddini found that around 30% of urban Italian children and only 5% of rural Italian children developed attachments to comfort objects. The interpretation of multiple studies suggests that child-rearing practices influence both the incidence of infants' attachment to inanimate objects and perhaps the choice of attachment objects. Common objects Common comfort objects used by humans include: pacifiers; weighted blankets; worry beads; and good luck charms. In Japan, dakimakura are commonly used by Japanese youth as "security objects". Using crib cards during exams can be considered a comfort object for students. In popular culture The term security blanket was popularized in the Peanuts comic strip created by Charles M. Schulz, who gave such a blanket to his character Linus van Pelt. Linus called it his "security and happiness blanket", in Good Grief, More Peanuts printed in 1956. However, the concept of a comfort blanket existed prior to Peanuts. In a November 1954 Review Report article, writer "Bev" wrote about her daughter: "Security blanket. My younger child is one year old. When she finds a fuzzy blanket or a fleecy coat, she presses her cheek against it and sucks her thumb." Since 1920, blankets which clipped onto sleeping infants to prevent them from rolling out of bed and keep the body covered were dubbed "security blanket fasteners". In the film The Producers, Leo Bloom is prone to panic attacks and to