Anxiety
The philosopher Søren Kierkegaard, in "The Concept of Anxiety" (1844), described anxiety or dread associated with the "dizziness of freedom" and suggested the possibility for positive resolution of anxiety through the self-conscious exercise of responsibility and choosing. In "Art and Artist" (1932), the psychologist Otto Rank wrote that the psychological trauma of birth was the pre-eminent human symbol of existential anxiety and encompasses the creative person's simultaneous fear of – and desire for – separation, individuation, and differentiation.
School psychology
Gertrude Hildreth was a psychologist with the Lincoln School at Teacher’s College, Columbia then at Brooklyn College in New York. She authored many books including the first book pertaining to school psychology titled, "Psychological Service for School Problems" written in 1930. The book discussed applying the science of psychology to address the perceived problems in schools. The main focus of the book was on applied educational psychology to improve learning outcomes. Hildreth listed 11 problems that can be solved by applying psychological techniques, including: instructional problems in the classroom, assessment of achievement, interpretation of test results, instructional groupings of students for optimal outcomes, vocational guidance, curriculum development, and investigations of exceptional pupils.Hildreth emphasized the importance of collaboration with parents and teachers. She is also known for her development of the Metropolitan Readiness Tests and for her contribution to the Metropolitan Achievement test. In 1933 and 1939 Hildreth published a bibliography of Mental Tests and Rating Scales encompassing a 50-year time period and over 4,000 titles. She wrote approximately 200 articles and bulletins and had an international reputation for her work in education.