ABSTRACT
Extrinsic nonwarning factors are variables unrelated to warning design that affect warning compliance. Some extrinsic factors are environmental, some are situational, and others are sometimes referred to as person variables. These extrinsic factors have not been investigated as extensively as intrinsic factors, but some literature in this area does exist. This chapter will discuss these extrinsic factors and how they influence compliance with warnings. It will explain how the presence of other people affects compliance (social influences), and how the perceived difficulty to comply (cost of compliance) influences selfprotective behavior. Compliance is associated with many factors that are interrelated in complex ways. Researchers are just beginning to uncover how these factors work together to influence whether people comply with warnings.
