How Is Feline Intelligence Measured? Methods and Limits

Search for a cat's IQ and you will notice that no firm number appears. For dogs you can quickly find claims like 'a Border Collie matches a toddler,' yet for cats even the rankings are vague. That is not because information is missing. It is because there is no principled way to apply IQ to a cat at all.

This article is an entry point to what peer-reviewed research has established about feline cognition, organized by topic. Each theme links to a more detailed article.

What the IQ number actually measures

IQ is not an absolute amount of ability. It is a relative value showing where a person sits within a same-age human group. Scores are transformed so that the mean is 100 and the standard deviation is 15 (what is the average IQ?).

In other words, an IQ figure only means something together with its reference group. Producing an IQ for a cat would require both a standardized feline population and a test standardized on it. Neither exists. Even the phrase 'a dog is as smart as a toddler' is, strictly speaking, a narrow claim that performance on one particular task was similar.

Where feline cognition research stands

Vitale Shreve and Udell (2015) published a review surveying cat cognition research past and present. Its conclusion is blunt: research on cat cognition is vastly outnumbered by research on dogs, and many domains remain untested.

There are several reasons. Cats are highly wary of unfamiliar environments and people, so bringing them into a laboratory is difficult in itself. Many individuals quit partway through a task. As a result, it is hard to separate a lack of ability from a lack of motivation to participate.

In recent years, designs run in the cat's own home and observational work at cat cafés and shelters have gradually increased what can be reported.

What is known, topic by topic

The following are the main themes peer-reviewed studies have addressed. Each has its own detailed article.

• Memory: the location of a hidden object becomes uncertain within a minute, while an owner's voice is retained far longer (how good is a cat's memory?)
• Object permanence: how far cats understand that an object continues to exist once out of sight (do cats remember hidden objects?)
• Problem solving: whether cats grasp causality in string-pulling tasks (how good are cats at problem solving?)
• Social cognition: how cats use human pointing, gaze, and an owner's reaction (do cats follow human pointing?)
• Reading emotion: whether cats distinguish human states from face, voice, and scent (can cats read human emotions?)
• Names and speech: their own name, cohabiting cats' names, and cat-directed speech (do cats understand human language?, does cat-directed speech get through?)
• Number sense: whether cats can choose the larger food quantity (can cats count?)
• Imitation: whether a cat can reproduce an action it has seen a person perform (can cats imitate people?)
• Self-recognition: whether cats recognize themselves in a mirror (do cats recognize themselves in mirrors?)
• Brain structure: cortical neuron counts and function (what is a cat's brain like?)
• Development and aging: kitten cognitive development and cognitive decline in senior cats (when does kitten cognition develop?, can cats develop dementia?)
• Everyday signs and owner recognition: 5 signs of a smart cat, does your cat remember you?
• Names and word learning: discriminating their own name and rapidly binding words to images (do cats understand their own names?, do cats learn human words?)
• Senses and perception: sitting in illusory squares, estimating body size, responding to cat-specific music (why do cats love boxes?, do cats know their own size?, do cats understand music?)
• Play and travel: fetching, the link between play and hunting, homing ability (is a cat that fetches smart?, does play make cats smarter?, is the feline homing instinct real?)
• Sources of individual variation: coat-color folklore and the owner's own personality (does coat color predict personality?, does the owner's personality affect the cat?)

How to check any claim of 'a cat's IQ is X'

First, look for a stated reference group. Without one, the number has not been compared to anything. Second, check what the underlying experiment actually measured. In most cases, performance on one specific task has been reworded as 'intelligence.'

Third, be careful with cross-species age equivalents. 'As smart as a two- or three-year-old' means performance was similar on some task, not that a cat's overall cognition equals a toddler's (what is a cat's average IQ?, can a cat's IQ be converted to a human age?).

What you can do at home

You cannot put a number on your cat's ability, but you can deepen your understanding by observing behavior. Cup-based hidden-object tasks, responses to a name, and how a cat approaches a food puzzle are collected in five feline intelligence tests to try at home.

As environmental enrichment, food puzzles are recommended in a veterinary behavior review (do puzzle feeders really help cats?). The goal, however, is quality of life, not raising intelligence.

Human IQ can be measured

A cat's IQ cannot be measured, but human IQ has standardized measurement methods. The free NekoIQ IQ test measures spatial reasoning, pattern recognition, logical inference, and classification in 20 questions and about 10 minutes, reporting an estimated IQ and a profile by domain. Because the items are non-verbal figures, the test is less affected by your first language.

Results are estimates for self-understanding and are not a substitute for an official intelligence test or a medical assessment. The scoring approach is published on our methodology page.