P: A strength lies in research support of situational variables' influence on obedience.
E: Bickman (1974) dressed up confederates in different outfits (jack and tie, milkman, security guard’s uniform) who asked people on the street to perform tasks such as picking up litter.
E: People were more likely to obey commands from an individual dressed as a security guard compared to the others, suggesting the power of situational cues.
L: Therefore, this supports the impact of environmental factors, such as uniforms, in shaping obedience behaviours, complementing Milgram's findings.