Does the body position matter when performing a cognitive task? Previous research using experimental tasks with cognitive conflict such as the Stroop task or task investigating the between-task congruency effect showed contradicting results. When comparing cognitive performance while sitting or standing, some studies reported impairments during standing, whereas others showed cognitive improvement. However, all this research used cognitive conflicts inherent in the stimulus material (e.g. Stroop), but not cognitive conflicts involving the spatial domain. The cognitive conflict in the Simon task or spatial compatibility task used here recruits to the match or mismatch between task-(ir)relevant stimulus position on the screen and response selection. Here, we present the results of two experiments which used a gyroscope to manipulate the body position. Participants performed each experiments in upright and horizontally tilted positions. The talk will focus on the influence of one’s own body position on response conflicts in spatial compatibility tasks.