The influence of social interactivity and engagement between co-actors during coordinated movement is not fully understood. To address the role of such interactivity, this project investigated synchronisation with either a socially engaging humanoid robot that exhibits explicit communicative cues intended to encourage social engagement (‘SocialBot’), or a static, non-engaging humanoid robot partner (‘MetroBot’). Both conditions included three levels of robot drumming adaptivity, ranging from minimally to moderately adaptive. The data consists of sensorimotor synchronisation data (text files) for 33 participants who drummed in time with both versions of the robot at the three levels of drumming adaptivity (referred to as the parameter alpha). Each participant’s data is stored in a separate folder named with the participant number. Note, the participant numbers start at P007 (participants 1 – 6 were pilot participants). The text files (48 files per participant – 4 blocks of 12 trials) include timing data for each auditory sequence and the associated drum stroke timing, as well as data relating to asynchrony, inter-tap intervals and inter-onset intervals. The degree of adaptivity is specified as ‘Alpha’ (either 0.1, 0.4, or 0.7) within the top two header rows of each text file. The robot condition is specified in the file name as either ‘R1’ or ‘R2’ for the Metrobot condition and either ‘H1’ or ‘H2’ for the SocialBot condition. The order that the conditions were presented in is specified with the letter B in the file name, e.g. B1 refers to the first block presented, B2 relates to the second etc. The final number within the file names refer to the trial number within each block starting at 0 through to 11 (12 trials).