Human short-term memory capacity is strictly limited to a specific number of items

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Human short-term memory capacity is strictly limited to a small number of items, historically estimated around seven chunks by Miller and more recently refined to approximately four items by Cowan and subsequent empirical studies.

The analysis

The claim that short-term memory capacity is strictly limited is well-supported by foundational and recent cognitive literature (e.g., Cowan, 2001; Morey, 2024; and electrophysiological studies on memory storage limits like contralateral delay activity). None of the retrieved papers refute the existence of a capacity limit; rather, they debate whether it is four or seven chunks and how long-term memory interactions affect apparent capacity, while consistently upholding the core principle that a strict memory limit exists.

Evidence for · 3

The magical number 4 in short-term memory: A reconsideration of mental storage capacity

Recorded source metadata

N. Cowan. The magical number 4 in short-term memory: A reconsideration of mental storage capacity. 2001. https://doi.org/10.1017/S0140525X01003922

Cowan's seminal work reviews evidence that human short-term memory has a strict, central capacity limit averaging about four chunks.

Source citation format

See more details

More for · 2

Modelling Working Memory Capacity: Is the Magical Number Four, Seven, or Does it Depend on What You Are Counting?

Recorded source metadata

S. Morra, P. Patella, Lorenzo Muscella. Modelling Working Memory Capacity: Is the Magical Number Four, Seven, or Does it Depend on What You Are Counting?. 2024. https://doi.org/10.5334/joc.387

Experimental comparisons of working memory models further validate limited attentional and storage capacity limits such as Cowan's four-unit model.

Source citation format

Contributions from Long-Term Memory Explain Superior Visual Working Memory Performance with Meaningful Objects.

Recorded source metadata

Park HB, Awh E. Contributions from Long-Term Memory Explain Superior Visual Working Memory Performance with Meaningful Objects.. 2026. https://doi.org/10.1523/jneurosci.1660-25.2025

Electrophysiological studies demonstrate that true visual working memory storage limits remain fixed and equivalent across stimulus types when proactive interference is controlled.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 9901 Aug 2026

More receipts

Is it true that Phonological evolution involves regular processes of phoneme elision, vowel nasalization, and tonogenesis?Is it true that Hemangiomas are treatable with medication?Is it true that Research identifies forms of intelligence that diverge from standard IQ measures?

Random receipt →The Trust Wiki →

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

trust me, bro: win the argument, pass the class, survive peer review.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work · Dispute this receipt