science

Parallel individuation system

Parallel individuation system is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Parallel individuation system rather than just read about it. In short: The parallel individuation system, also called object tracking system is a non-symbolic cognitive system that supports the representation of numerical values from zero to three (in infants) or four (in adults and non-human animals). It is one of the two cognitive systems responsible for the representation of number, the other one being the approximate number system.

Key takeaways

Parallel individuation system belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Parallel individuation system to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Parallel individuation system from memory before moving on to harder problems.

Reference excerpt

The parallel individuation system, also called object tracking system is a non-symbolic cognitive system that supports the representation of numerical values from zero to three (in infants) or four (in adults and non-human animals). It is one of the two cognitive systems responsible for the representation of number, the other one being the approximate number system. Unlike the approximate number system, which is not precise and provides only an estimation of the number, the parallel individuation system is an exact system and encodes the exact numerical identity of the individual items. While counting and estimation correspond to the approximate number system, the parallel individuation system is tied to subitizing. The parallel individuation system has been attested in human adults, non-human animals, such as fish and human infants, although performance of infants is dependent on their age and task.

Evidence The evidence for parallel individuation system comes from a number of experiments on adults, infants and non-human animals. For example, adults perform error-free when they enumerate elements for numerosities from one to four, after which their error rate rises. Similarly, infants of 10 to 12 months represented the values for "exactly one", "exactly two" and "exactly three", but not for higher numbers, in a task based on hidden object retrieval. Parallel individuation system in animals was demonstrated in an experiment in which guppies were tested on their preference of social groups of different size, under the assumption that they have a preference for bigger-size groups. In this experiment, fish successfully discriminated between numbers from 1 to 4 but after this number their performance decreased. However, not all studies find confirmation of this system and for example New Zealand robins showed no difference in their understanding of small (1 to 4) and larger (above 4) amounts.

References

Further reading Geary, David C. (1994). Children's Mathematical Development: Research and Practical Applications. Washington, DC: American Psychological Association. ISBN 978-1-55798-258-2.

Illustrations

Worked examples

Example 1 — a first encounter with Parallel individuation system

Start with the simplest possible case. Write down what Parallel individuation system claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Parallel individuation system before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Parallel individuation system ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Parallel individuation system

In research: Parallel individuation system appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Parallel individuation system in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Parallel individuation system is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cognitive science, Perception, so understanding it makes those chapters shorter.
In everyday life: Look for Parallel individuation system outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Parallel individuation system in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Parallel individuation system means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Parallel individuation system out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Parallel individuation system in simple terms?

Why does Parallel individuation system matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Parallel individuation system?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Parallel individuation system.