The study assesses how a social desirability (SD) bias influences the relationship between several independent and dependent variables commonly investigated in ethics research. The effect of a SD bias was observed when a questionnaire was administered under varying conditions of anonymity and with different measurement techniques for the SD construct. Findings reveal that a SD bias is present in the majority of relationships studied, and it most frequently plays a moderating role. While the measure of SD influences the strength and type of relationship, condition of anonymity has relatively little effect on the level of SD.