Do not turn your head when estimating the distance: influence of head rotation on distance judgement.

According to the mental number line (MNL) concept, people mentally represent numbers along a line with smaller values on the left and greater on the right. Embodied cognition theory assumes that MNL is activated by postural bias and in turn affects cognitive processes; for example, research shows that quantitative estimates are smaller when participants' bodies are leaning to the left than to the right. In this study, we tested whether distance estimation in the natural environment is influenced by head rotation.