<p>Sure. For example, working memory can be assessed using <a href="https://cogsci.stackexchange.com/q/101/13">the <strong>delayed match to sample</strong> task</a>. Here are examples from <a href="http://www.mitpressjournals.org/doi/abs/10.1162/jocn.2006.18.5.749" rel="nofollow noreferrer">monkeys</a>, <a href="http://psycnet.apa.org/journals/bne/107/5/715/" rel="nofollow noreferrer">rats</a>, <a href="http://www.ncbi.nlm.nih.gov/pubmed/11131788" rel="nofollow noreferrer">pigeons</a>, and <a href="http://www.cogs.indiana.edu/spackled/2010readings/Giurfa.Honeybees.pdf" rel="nofollow noreferrer">bees</a>.</p>

<p>The problem with <strong>comparing them</strong> is that the actual stimuli used for each species are different (e.g. odors for bees, shapes for monkeys) and this is known to affect the results. </p>

<p>In humans, if you run similar tasks, just with small verses large sets of possible stimuli, for example digits verses general words, you can get very different results. Even if you did try to use the same stimuli set, the result will probably not be "subjectively" equal to that of a different species. Think of yourself trying to do the odor task of the bees; it's not a fair game.</p>

<p>Other seemingly small changes in the paradigm can also affect the results, for example a delay between the trials, etc. So the only way to seriously compare them would be to conduct the same experiment, by the same lab, of different species. I personally don't know of any research that was directly aimed at comparing them. Maybe someone using (lesioned) animals as a model for dementia would know more.</p>

CC BY-SA 3.0
2012-01-20T11:24:47.373Z
2012-01-20T22:58:54.917Z
2017-04-13T12:56:16.467Z
Ofri Raviv
<p>Sure, visual working memory capacity has been assessed in humans, chimps and mac using a change-detection tasks and trail-making tasks. </p>

<p>For example, the chimp Ayumu at Kyoto University easily outperforms all humans on a simple number sequencing task. In the task, the numbers 1-n appear briefly on the screen in random positions and then the numbers must be touched by the participant in numerical order. Ayumu can sequence more than nine digits in less than 200 ms, according to the 2007 paper. In contrast, human performance was at chance levels at that exposure duration. </p>

<p>In another visual working memory task, the change-detection task, colored shapes appear on the sample screen, disappear for some brief amount of time (typically about a second) and then reappear. 50% of the time all the squares are the same, 50% of the time one square has changed. The subject indicates if a the test screen matches the sample screen. This a delayed-match-to-sample task. To measure memory capacity, the sample and test array sizes are increased, 2,4,8, etc.  Humans and rhesus perform equivalently on this task, in that both species are able to perform at or above 80% correct for array sizes of about 3~4 items. 
<a href="http://www.pnas.org/content/early/2011/06/13/1104666108.full.pdf" rel="nofollow noreferrer">earl miller study</a></p>

<p><a href="http://io9.com/" rel="nofollow noreferrer">io9</a> published a pop-sci discussion of the chimp study, <a href="http://io9.com/5883579/this-chimp-will-kick-your-ass-at-memory-games--but-how-the-hell-does-he-do-it" rel="nofollow noreferrer"><em>"This chimp will kick your ass at memory games — but how the hell does he do it?"</em></a>, and <a href="http://games.lumosity.com/chimp.html" rel="nofollow noreferrer">links to a flash game by Lumosity Games</a> that replicates the original study.</p>

CC BY-SA 4.0
2012-04-14T13:41:45.063Z
2019-12-13T05:01:01.630Z
2019-12-13T05:01:01.630Z
awm
<p>When classes come visit the <a href="http://evolutionaryanthropology.duke.edu/research/dogs" rel="nofollow">Duke Canine Cognition Center</a>, we ask them how they would test the memory of their pet. The kids come up with a solution pretty similar to how its done. One kid put down 5 different cups, showed the dog a treat, and placed it under one of the cups. Then the dog was either distracted, or simply restricted from approaching the cups, for a fixed amount of time. The dogs are very eager to retrieve the treat, and will often just stare at the cup until the time has elapsed, so in another version we shield the cups with a giant occluding board so the dog must keep an <em>internal representation</em>. This task is no problem for many dogs. We do 20 second, 40 second, and then 60 second trials with only 3 cups, and there is a lot of variability in success.</p>

CC BY-SA 3.0
2012-08-11T01:03:52.820Z
Could you cite some of the publications that have come out of this?  I think they will come in handy for future readers.
Chuck Sherrington
CC BY-SA 3.0
2012-08-10T22:59:37.007Z
2012-08-10T22:59:37.007Z
David Winer
<p>Is it possible to measure the <a href="http://en.wikipedia.org/wiki/Working_memory">working memory</a> of a non-human animal? And if so, have there been any studies that have quantified the working memory of animals, and that have compared that to the working memory of humans? Or are the two not comparable?</p>

CC BY-SA 4.0
2019-12-14T08:33:09.360Z
If an animal responds to verbal commands, you can spell out the command phonetically, similar to the way we spell out words like d-o-c-t-o-r to keep the kids from having an adverse reaction to hearing the word “doctor”. But that’s a literal spelling and I’m suggesting to do a phonetic spelling like duh-ah-ck-tuh-ur. If the animal strings together the syllables then it has a working memory. Try it with roll-over or something...ruh-oh-luh oh-vuh-ur.
Philip Yeranosian
<animal-cognition><memory>
Is it possible to measure the working memory of a non-human animal?
InquilineKea
# Is it possible to measure the working memory of a non-human animal?

(Asked by: username_0 on 2012-01-20)

Is it possible to measure the [working memory](http://en.wikipedia.org/wiki/Working_memory) of a non-human animal? And if so, have there been any studies that have quantified the working memory of animals, and that have compared that to the working memory of humans? Or are the two not comparable?

**Tags:** animal-cognition, memory

> **Comments:**
> **username_1**: If an animal responds to verbal commands, you can spell out the command phonetically, similar to the way we spell out words like d-o-c-t-o-r to keep the kids from having an adverse reaction to hearing the word “doctor”. But that’s a literal spelling and I’m suggesting to do a phonetic spelling like duh-ah-ck-tuh-ur. If the animal strings together the syllables then it has a working memory. Try it with roll-over or something...ruh-oh-luh oh-vuh-ur.  

---

## 3 answers

### Answer by username_2 on 2012-01-20. Score: 12

Sure. For example, working memory can be assessed using [the **delayed match to sample** task](https://cogsci.stackexchange.com/q/101/13). Here are examples from [monkeys](http://www.mitpressjournals.org/doi/abs/10.1162/jocn.2006.18.5.749), [rats](http://psycnet.apa.org/journals/bne/107/5/715/), [pigeons](http://www.ncbi.nlm.nih.gov/pubmed/11131788), and [bees](http://www.cogs.indiana.edu/spackled/2010readings/Giurfa.Honeybees.pdf).

The problem with **comparing them** is that the actual stimuli used for each species are different (e.g. odors for bees, shapes for monkeys) and this is known to affect the results.

In humans, if you run similar tasks, just with small verses large sets of possible stimuli, for example digits verses general words, you can get very different results. Even if you did try to use the same stimuli set, the result will probably not be "subjectively" equal to that of a different species. Think of yourself trying to do the odor task of the bees; it's not a fair game.

Other seemingly small changes in the paradigm can also affect the results, for example a delay between the trials, etc. So the only way to seriously compare them would be to conduct the same experiment, by the same lab, of different species. I personally don't know of any research that was directly aimed at comparing them. Maybe someone using (lesioned) animals as a model for dementia would know more.


---

### Answer by username_3 on 2012-04-14. Score: 8

Sure, visual working memory capacity has been assessed in humans, chimps and mac using a change-detection tasks and trail-making tasks.

For example, the chimp Ayumu at Kyoto University easily outperforms all humans on a simple number sequencing task. In the task, the numbers 1-n appear briefly on the screen in random positions and then the numbers must be touched by the participant in numerical order. Ayumu can sequence more than nine digits in less than 200 ms, according to the 2007 paper. In contrast, human performance was at chance levels at that exposure duration.

In another visual working memory task, the change-detection task, colored shapes appear on the sample screen, disappear for some brief amount of time (typically about a second) and then reappear. 50% of the time all the squares are the same, 50% of the time one square has changed. The subject indicates if a the test screen matches the sample screen. This a delayed-match-to-sample task. To measure memory capacity, the sample and test array sizes are increased, 2,4,8, etc. Humans and rhesus perform equivalently on this task, in that both species are able to perform at or above 80% correct for array sizes of about 3~4 items.
[earl miller study](http://www.pnas.org/content/early/2011/06/13/1104666108.full.pdf)

[io9](http://io9.com/) published a pop-sci discussion of the chimp study, [*"This chimp will kick your ass at memory games — but how the hell does he do it?"*](http://io9.com/5883579/this-chimp-will-kick-your-ass-at-memory-games--but-how-the-hell-does-he-do-it), and [links to a flash game by Lumosity Games](http://games.lumosity.com/chimp.html) that replicates the original study.


---

### Answer by username_4 on 2012-08-10. Score: 1

When classes come visit the [Duke Canine Cognition Center](http://evolutionaryanthropology.duke.edu/research/dogs), we ask them how they would test the memory of their pet. The kids come up with a solution pretty similar to how its done. One kid put down 5 different cups, showed the dog a treat, and placed it under one of the cups. Then the dog was either distracted, or simply restricted from approaching the cups, for a fixed amount of time. The dogs are very eager to retrieve the treat, and will often just stare at the cup until the time has elapsed, so in another version we shield the cups with a giant occluding board so the dog must keep an *internal representation*. This task is no problem for many dogs. We do 20 second, 40 second, and then 60 second trials with only 3 cups, and there is a lot of variability in success.

> **Comments:**
> **username_5**: Could you cite some of the publications that have come out of this?  I think they will come in handy for future readers.  

---

