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
Cat registry a cat to be registered by more than one registry. The World Cat Congress (WCC) is an international coordinating organisation of the largest cat registries. WCC operates an "open-door" policy by which cats registered with one WCC registry can be shown under the rules of another WCC registry. Going further, the World Cat Federation, a WCC member accepts half again as many breeds as it publishes standards for, because it accepting the standards of TICA, FIFe, and several other WCC-affiliated federations, though it has also produced some nomenclatural conflicts with some of them. Some independent cat registries specialise in particular