The acquisition of the PSI schemas of the host culture is a necessary condition for sojourners' cross-cultural adaptation to the culture. Axiom 4: The PSI schemas of a person's own culture are interrelated with each other, forming a network of cultural schemas to generate behaviors that are appropriate in the culture. Experience in the host culture causes a change in one's cultural schema. This causes further changes in all other cultural schemas and results in a total change in behavior. Axiom 5: The acquisition of information about interrelationships among the PSI schemas of the host culture is a necessary condition for sojourners' cross-cultural adaptation. Axiom 6: People use both schema-driven and data-driven processing to perceive new information, depending on the situation and their motivations. Axiom 7: If one has well-organized cultural schemas, schematically salient information is more likely to be processed through the schemas, whereas ambiguous information will either direct a search for the relevant data to complete the stimulus more fully, or it will be filled in with default options of the schemas. Axiom 8: Sojourners who lack the PSI schemas of the host culture are more likely to employ data-driven processing, which requires effort and attention. Axiom 9: In the host culture, sojourners encounter truly novel situations where they experience cognitive uncertainty and anxiety because of the lack of the PSI schemas in the situations. Axiom 10: In the host culture, sojourners experience the stages of self-regulation and self-direction. In the stage of self-regulation, they try to resolve ambiguities and to establish integration of information using their native-culture schemas by gradually modifying them. In the stage of self-direction, on the other hand, they actively try to reorganize their native culture schemas or to generate host culture schemas in order to adapt to the host-culture environment. Real-world example – a sojourner's experience As discussed above, sojourners are people who live in a culture other than their own with the intent of one day returning home. For sojourner Gillian Gibbons' situation, the cultural schema theory is highly applicable. Ms. Gibbons, a British school teacher, left Liverpool, England in August 2007 to teach a group of six- and seven-year-olds at Unity School in Khartoum, Sudan. Shortly after her arrival, Ms. Gibbons class was due to study the habitat and behavior of bears. Upon her request, a student brought in a teddy bear to serve as a case study. Students were invited