Now, it is rare that policepersons involved in these practices recognize that they have detained someone because of their ethnic or class characteristics, rather they say it is because "they resemble the description of the suspect". Therefore, it is not always easy to study objectively the practice of profiling and, at the same time, the objective profiling does not necessarily coincide with the subjective perception of having been a victim of it.
Ahora bien, raramente los policías implicados suelen reconocer que han detenido a alguien por sus características étnicas o de clase, sino porque se "asemeja a la descripción del sospechoso", por lo cual no siempre es fácil estudiar el profiling objetivo y a la vez no necesariamente coincide el profiling objetivo de la percepción subjetiva de haber sido víctima del mismo.