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Home > SD Providers > Psychologists

Dr. John Larson, PHD

(No ratings)

Specializes in: Psychology

525 E Illinois Street
Spearfish, SD 57783

(605) 717-1219

Dr. John Larson, PHD is a psychologist in Spearfish, SD specializing in psychology.

Office Locations

525 E Illinois Street
Spearfish, SD 57783

(605) 717-1219

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In The News

“The man credited with fully developing the polygraph, a Berkeley police officer named John Larson, who also had a PhD in psychology, would later turn on his invention as unreliable, according to...”—"The Trump administration revives an old intimidation tactic: the polygraph machine", CNN, June 2025

Education & Training

He has a state license in South Dakota.

Licensed In: South Dakota

Ratings & Reviews

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Biography

Dr. John Larson is a psychology specialist in Spearfish, SD. Dr. Larson has obtained a license to practice in South Dakota.