One of the first psychologists to theorize about the potential effects of birth order was

The Psychologist is Alfred Adler - Field: psychodynamic; input : basic mistakes, style of life, inferiority/superiority complexes, childhood influences personality formation; Studies: Birth Order. French Ministry of Education told the psychologist Alfred Binet to devise a method that would tell which students did not learn effectively from regular classroom instruction so they could be given remedial work.