Would someone kindly tell me the meaning of  biliþsel yetileri in english?

Thanks

His/her knowing capabilities of something or his/her (natural) capabilities in knowing something

Or his/her senses related to consciousness

It´s a literal translation. Let me know if there is a word for it English.

Thank you, but could it be translated as Mental Power?

Positive. Even though it can be translated as "zihin gücü"

yeah we can say Mental Power or Cognitive Power/Ability

Cognitive Power is better though

Thank you so much

biliþsel yetileri = Cognitive Capability