@maxood and rao sadia.
Determinants of perception are divided into three categories
A.objective determinants,these are perceptual organization,perceptual constancy and characteristics of stimulus.
B.subjective determinants are
Motivation,perceptual set,expectation,past experience,attention,interests,attitude,personal atributes,emotional state,personal values,etc
C.social determinants are
Social values,social beliefs,custums and rituals,natural laws and social norms.
Regards.

@soft which sort of dificulties you find in these topics?mention ur querries topicwise.

@atifdada,refer following books for paper 2
1.Feldman
2.sheherbano part2.