The American Pit Bull Terrier (APBT) is a purebred dog breed recognized by the United Kennel Club (UKC) and American Dog Breeders Association (ADBA), but not the American Kennel Club (AKC). In February 10, 1898 the breed was recognized by the United Kennel Club (UKC) named as American Pit Bull Terrier. The ATTS (American Temperament Test Society) conducts temperament testing since 1977 with several dog breeds, and as of July 2018 has tested more than 900 APBTs. According to the tests conducted by ATTS, the APBTs has an 87.4% pass rate. This compares to a pass rate 85.6% for the Golden Retriever, which is one of America's most popular dog breeds. The World of the American Pit Bull Terrier. T.F.H. Publications.