The theoretical model underlying CAPTain is the criterion-based diagnostics. The aim is to determine the position of the proband relatively to the nominated criteria. This has decisive advantages in aptitude diagnostics:
For example, for a personnel selection decision it is of little interest to know how independently an applicant works compared to other applicants of his/her age and educational group (e.g. more independently than 60% of the comparison group), but whether a person has the exact amount of independency necessary for the specific function.