Attention moderates the Motion Silencing Effect for dynamic orientation changes in a discrimination task

Being able to detect changes in our visual environment reliably and quickly is important for many daily tasks. The Motion Silencing Effect describes a decrease in the ability to detect feature changes for faster moving objects, compared with stationary or slowly moving objects. One theory is that spatiotemporal receptive field properties in early vision might account for the silencing effect, suggesting its origins are low-level visual processing. Here we explore whether spatial attention can modulate motion silencing of orientation changes to gain greater understanding of the underlying mechanisms. In Experiment 1, we confirm that the motion silencing effect occurs for the discrimination of orientation changes. In Experiment 2, we use a Posner-style cueing paradigm to investigate whether manipulating covert attention modulates motion silencing for orientation. The results show a clear spatial cueing effect: participants were able to discriminate orientation changes successfully at higher velocities when the cue was valid compared to neutral cues and performance was worst when the cue was invalid. These results show that motion silencing can be modulated by directing spatial attention towards a moving target and provides support for a role for higher-level processes, such as attention, in motion silencing of orientation changes.