We explore what drives the segmentation of individual actions in visual perception.
In most of our experiments, participants' task was to detect the subtle disruptions in video clips of different actions. Surprisingly, participants were less sensitive to the subtle changes at action boundaries relative to non-boundaries.
Links to full stimuli set:
Skeletonized actions - versus twisted versions
Point-light actions - versus scrambled versions
Point-light actions - versus inverted versions
Links to the six experiments:
Experiment 1 - explict judgments about action boundaries
Experiment 2 - visual detection of temporal slowdowns
Experiment 3 - visual detection of spatial change
Experiment 4a - low-level dynamic features
Experiment 4b - low-level static features
Experiment 5a - Point-light walkers (PLW): inverted control
Experiment 5b - Point-light walkers (PLW): Scrambled control
Data, stimuli, and other materials are available at https://osf.io/j85fa/?view_only=5e8b591d440f49c4ba56150befe9e680.