With Dr Andrews, Dr Ellis and Miss Shaw we've created a simple method to automatically measure smartphone use. We found that people check their phones up to 85 times per day. Read about this in PLoS One.
Piwek, L., Pollick, F. E. and Petrini, K. (2015) "Audiovisual integration of emotional signals from others’ social interactions", Frontiers in Psychology 6:611.
Petrini, K., Piwek, L., Crabbe, F., Pollick, F. E. and Garrod, S. (2014) "Look at those two!: The precuneus role in unattended third-person perspective of social interactions", Human Brain Mapping 35: 5190 - 5203.
Piwek, L., McKay, L., Pollick, F. (2014) "Empirical evaluation of the uncanny valley hypothesis fails to confirm the predicted effect of motion, Cognition 130: 271 - 77.