Cognitive Approach Psychology
Cognition means "knowing".
This refers to studying the human mental process and how they are thinking, feeling and behaving.
As the man focus is on the way human process information on how we treat information that comes in the person.
A nomothetic approach
This is used to discover human cognitive process, this has adapted idiographic technique through using a case studies, (eg KF, HM).
Cognition is also a reductionist approach which means all behaviour no matter how complex can be reduced to simple cognitive process, like the memory.