Effects of mental resource availability on looming task performance.

Past research has shown that the looming bias-the tendency to judge one's distance to an approaching object as shorter than in actuality-is stronger among people who are physically weak or vulnerable. The current study examined whether the looming bias would also be stronger among people who are mentally weak or vulnerable. We tested that hypothesis by subjecting 46 young adults to cognitive load and examining their perceptions of approaching objects distance. Participants completed two blocks of the looming task, once under high cognitive load (memorizing a seven-digit number) and once under low load (memorizing a two-digit number). Participants exhibited a stronger looming bias under high load than under low load. These findings support the hypothesis that the looming bias will be stronger when people are weak or vulnerable-either physically or mentally-and in need of a larger margin-of-safety.