Pyknik' is one of the body type as classified by:

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Accepted Answer

The correct option is (2):

The 'Pyknik' body type is a term specifically coined and defined by the renowned German psychiatrist Ernst Kretschmer as part of his constitutional typology. Kretschmer, in the 1920s, developed a classification system for physiques—Asthenic, Athletic, and Pyknic—to study the correlation between body build and personality traits, and ultimately, susceptibility to certain mental illnesses. The Pyknic type is characterized by a rounded, stocky build with a soft outline, a broad face, and a disposition towards accumulating fat, which gives them a plump or moderate-to-high-obesity appearance. Kretschmer hypothesized that these individuals possessed a 'Cyclothymic' temperament, meaning they are social, prone to mood swings, and were more often associated with manic-depressive illness (now Bipolar Disorder).

The incorrect option is (1):

Sheldon, referring to William Herbert Sheldon, is famous for developing the widely recognized somatotype classification system in the 1940s. Sheldon's system uses three primary components—Endomorphy, Mesomorphy, and Ectomorphy—to describe body shape quantitatively on a scale of 1 to 7 for each component. His Endomorph type shares characteristics with Kretschmer's Pyknik, as both describe a round and soft body with a tendency toward fat accumulation. However, the systems are distinct in their terminology and methodology, with Sheldon’s being a dimensional rather than a typological approach. Therefore, while related in concept, the term 'Pyknik' belongs to the Kretschmer system.

The incorrect option is (3):

Bucher, which refers to Charles A. Bucher, is a prominent name in modern Physical Education, but his contributions are focused on educational theory and administration, not somatotype classification. Bucher is best known for his scholarly work on the principles, philosophy, and professional development within physical and health education. He wrote extensively about the major objectives of physical education, which include physical, motor, mental, and social development, helping to establish the field as an academic and professional discipline. He did not propose any terms like Pyknik, Asthenic, or Endomorph.

The incorrect option is (4):

Thorndike, or Edward L. Thorndike, was a highly influential American psychologist, but his professional domain was educational psychology and the study of learning. He is a key figure in behaviorism, credited with developing the 'Law of Effect,' the 'Law of Exercise,' and the theory of connectionism. His research centered on how learning occurs through trial and error, the formation of stimulus-response bonds, and the principles governing skill acquisition. As a result, Thorndike’s work is entirely distinct from the field of physical anthropology or constitutional psychology concerned with the categorization of human body types.