1.The science of mental life.
2.The mental characteristics of a particular person.
It is an academic discipline and an applied science which seeks to
understand individuals and groups by establishing general principles and
researching specific cases.School Psychology is a field that applies principles of educational psychology, developmental psychology, clinical psychology, community psychology, and applied behavior analysis
to meet children's and adolescents' behavioral health and learning
needs in a collaborative manner with educators and parents. School psychologists are educated in psychology, child and adolescent development, child and adolescent psychopathology, education, family and parenting practices, learning theories, and personality theories. They are knowledgeable about effective instruction and effective schools. They are trained to carry out psychological testing and psycho-educational assessment, counseling, and consultation, and in the ethical, legal and administrative codes of their profession.
Hope this helps u....................^_^