When people move through large-scale environments, they use multiple strategies to find their ways. While many studies have investigated individual wayfinding strategies, in naturalistic settings people usually don’t navigate alone, but search for their destinations in pairs or small groups. Having a shared goal can have an impact on the perception of the scene, the attentional focus and the behavior of the individual participant. We investigate how social interaction influences navigation behavior and focus on a cooperative scenario. We developed a joint wayfinding paradigm to measure walking trajectories, walking speed, gaze behavior and speech data in a naturalistic indoor setting. We use two mobile eyetracking devices to analyse the behavior of pairs of participants solving wayfinding tasks. We’ll present data on the impact of participants’ cooperation behavior on perceptual and attentional processes and wayfinding strategies.