1. Freud published his case study of Little Hans, a boy with a phobia of horses in 1909
2. By means of indirect observation - through the letters written by little Hans' father, Freud studied the case of little Hans over a period of several years, starting from age 3
3. It was noted that Hans showed an interest in his 'widdler' from age 3, and touched it which led his mother to threaten him to have it cut off from the family doctor. Freud believed that this marked the development of the Oedipus complex - the sexual attraction of a boy for his mother - in Hans
4. Little Hans often saw horses near his house, and he was seen to be afraid in particular of horses with black marks around their mouth
5. Freud interpreted this as Hans' projection of his father's fear onto the horses which resembled his father since the black marks resembled his father's moustache, and glasses
6. Freud concluded that Hans' fear of being castrated by his father had been projected on the horses that symbolized his father, which caused his phobia