# Clinical Types of Mental Deficiency

Clinical Types of Mental Deficiency SummarySummarizes the environmental and genetic causes of mental deficiency. Cites typical cases of the eight major pathological groups of mental deficiency. Shows how performance.tests aid in classifying morons, imbeciles and idiots. Among the comedians whose different styles and personalities are examined in the film are Charlie Chaplin, Harold Lloyd, Larry Semon, Charlie Chase, Laurel and Hardy, Ben Turpin and Billy West.

- Kind: Educational
- Year: 1957
- Runtime: 36 min
- By: University of Minnesota. Audio-Visual Education Service
- Genres: Education, Industrial and advertising
- Archive: [Internet Archive](https://archive.org/details/clinicaltypesofmentaldeficiency)
- Licence or status: none stated by the archive
- Who can watch: Kids profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/clinicaltypesofmentaldeficiency?play=1)