Data contains a Readme file and the datasets used to address the three aims in the paper. Included is:- Data used to quantify activity and boldness in founders and the F1 generation of house mice.-Testing for a behavioural syndrome between activity and boldness.-Testing for a personality bias among treatments within the Founder and F1 generation following a field-trial.- GUD trials for founder mice only. Also included are two video files showing the differences in behaviours used to quantify personality traits between a High Activity and a Low Activity mouse.