This is the 16003rd most frequent Russian word.
психологических
The word "психологических" means "psychological" in English.
In this sentence, 'психологических' is an adjective in the genitive plural form modifying 'проблем', indicating the type of problems.
Психологических проблем нужно избегать.
Psychological problems should be avoided.
In this sentence, 'психологических' is in the prepositional plural form, agreeing with 'аспектах', describing the specific aspects being addressed.
Лекция о психологических аспектах развития была интересной.
The lecture on the psychological aspects of development was interesting.
Here, 'психологических' is in the genitive plural, describing 'факторов' and indicating attributes of the factors.