The Short Version
The claim captures a real element of UKCG but significantly oversimplifies it. While UKCG does include a psychometric personality screening component (notably the INSAK teaching personality inventory), multiple sources confirm it is a multi-component selection process that also encompasses cognitive/aptitude sections, physical fitness assessments, and teaching demonstration videos. Describing UKCG as simply "a psychometric test" omits these dimensions and would give readers a materially incomplete picture of what the assessment involves.