What motivates early lies? Deception in 2½- to 5-year-olds

What motivates young children to produce early lies? A total of 217 2½- to 5-year-old children (M_age = 44.5 months, SD = 8.45; 54% girls; 61.7% White) from the southeastern United States were tested using a modified third-party transgression paradigm to examine the motivation behind their deception. Children were assigned to one of three conditions—baseline, self-motivated, or other-motivated condition—and their propensity to lie was captured through both verbal and nonverbal measures. Results show that children’s early lies are primarily driven by a self-serving motivation. However, the motivation to lie diversifies by 4 years of age, when children begin to lie for both self-serving and other-serving motivations.