Cat intelligence the average human. Within the encephalization quotient proposed by Jerison in 1973, values above 1 are classified big brained, while values lower than 1 are small brained. The domestic cat is attributed a value of between 1–1.71 relative to human value that is 7.44–7.8. The largest brains in the Felidae family are those of the tigers in Java and Bali, of which the largest relative brain size within the "panthera" is the "tigris". It is debated whether there exists a causal relationship between brain size and intelligence in vertebrates. Correlations have been shown between these factors in a number of
Pampas cat it, while other do not. Populations in southern Chile and the southern part of Argentina, included in the nominate in the above list, have been recognised as the subspecies "L. p. crucinus" based on the large size (the largest Pampas cats) and dull pelage. More recent work, primarily genetic studies, failed to find support for a split at species level, although some geographical substructure was recognised. Several authors recognise the Pampas cat as a single species. Since 2017, the Cat Classification Taskforce of the Cat Specialist Group recognises the Pampas cat as a single species with seven subspecies: The Pampas