Cognitive Psychology, Organisation Of Words- Theories & Studies?

[halfblood]

I am doing some coursework for psychology and I DO NOT want any help per sei BUT I do need to find two things:

1.THEORIES on organisation of words
2.STUDIES on organisation of words

I would like links or an explanation of both if possible, kindest regards, Me
i would like to doublely note that I do NOT want coursework done for me or anything along those lines, just some help locating/ wish explaining some of the theories and studies!