OPP – experts in business psychology and personality assessment | OPP OPP, psychometric tests, psychometric instruments, psychometric assessments, psychometrics, business psychology, occupational psychology, psychology consultancy OPP is part of CPP – the Myers-Briggs® Company and one of Europe’s largest business psychology providers. Providing training, resources and consultancy, OPP and its partners deliver effective and innovative talent selection and people development solutions.