Neonatal, socio-demographic, neuropsychological and on-line behavioural data of the PVH+VD and UPVH groups performing an n-back task.

+Mean and standard deviation (SD) are presented, unless otherwise stated a The time taken to initiate the problems b The time taken to complete the problems c The number of problems solved in minimum moves a,b The planning and execution times were calculated at the highest level of difficulty (5 moves) to minimize possible ceiling effects.Neonatal, socio-demographic, neuropsychological and on-line behavioural data of the PVH+VD and UPVH groups performing an n-back task.