Philippa A. Johnson

I am a postdoctoral researcher in the Landau Lab at UCL. My research explores attention fluctuations across different timescales, from sub-second attentional sampling to slow changes in sustained attention over minutes to hours.

In the CoCoSys Lab at Leiden University, I used computational modelling of behavioural data from mice and humans to reveal some of the latent attentional dynamics present during decision-making. In particular, I investigated the role of pupil-linked arousal in causing transitions between being engaged and disengaged in a task.

I previously completed my PhD in the Timing Lab at the University of Melbourne, where I investigated how the visual system compensates for the time required for transmission and processing of information during motion perception. I showed that the early visual cortex compensates significantly for these neural delays by predictively encoding the position of moving objects, and that these predictive mechanisms affect perception of moving objects.