<p>The answers to your questions in your post would depend on the scope of your study.  For example, with</p>

<blockquote>
  <p>How long should the time between encoding and decoding be?</p>
</blockquote>

<p>it would depend on what criteria is set within the scope of the study.  If the people who are asking you to perform the study are asking for specific timescales then you need to stick to them and outline that in your report.</p>

<p>If however you have freedom to do so, as you seem to be asking on a psychological standpoint, it may be beneficial to test different timescales and maybe tabulate the results of memorability against time. You could even test different timescales against different ranges of emotional levels attached to the event.</p>

<p>For example, </p>

<p><strong>does a person remember a highly emotional episodic memory longer than a non-emotional one?</strong> </p>

<p><strong>What about medium levels of emotions?</strong></p>

<p>You could also add to this with your question on how long snippets should be.</p>

<p><strong>Does a 5sec video snippet help someone to remember better than a single frame image?</strong></p>

<p>If you have the time and freedom to explore, you can conduct a large amount of research on memory.  It would only be down to how wide you can make the scope of the study whilst keeping it within the remit of what you are trying to find out.</p>

CC BY-SA 3.0
2017-07-03T00:13:07.030Z
2017-07-03T00:13:07.030Z
Chris Rogers
<p>Episodic memory is probably the most complicated kind of memory, and a lot of these parameters are going to vary in interesting ways - for example, playing a video may result in better recall (what you call "decoding") because it preserves the temporal context of the memory. These things are interesting, and the way you treat them depends <strong>entirely on the specific question you are interested in asking.</strong></p>

<p>There's a lot of parameters here that you're going to want to just test out (and report the results of in your paper!). </p>

<p>However, I want to leave you with a <a href="http://www.pnas.org/content/112/35/11078.abstract" rel="nofollow noreferrer">study</a> that may help guide your thinking. These authors did something similar, but were more interested in the neurophysiology - you might find some helpful context. </p>

CC BY-SA 3.0
2017-07-08T21:28:33.917Z
2017-07-08T21:28:33.917Z
seq.neuro
<p>I'm planning a study on memorability of episodic events.
Therefore, participants record a couple of hours of their daily life using an egocentric camera (encoding).
After a certain time, they are shown snippets from the recording and judge whether they remember it or not (decoding).</p>

<p>I don't have a psychological background, hence I have some questions:</p>

<ul>
<li><strong>How long should the snippets be?</strong> Currently, we have 5sec videos, separated by 10sec margin.
I know <a href="https://en.m.wikipedia.org/wiki/Chunking_(psychology)" rel="nofollow noreferrer">chunking</a>, however, it happens in encoding phase, I'm looking for an equivalent in decoding.</li>
<li>Maybe showing a few <strong>frames</strong> from the video is <strong>better than</strong> playing <strong>video?</strong></li>
<li>How long should the <strong>time between encoding and decoding</strong> be? Currently, it's 6 to 8 days. I'm aware of <a href="https://en.m.wikipedia.org/wiki/Chunking_(psychology)" rel="nofollow noreferrer">Time Scale Similarity</a>.</li>
<li>I've found <a href="http://s3.amazonaws.com/academia.edu.documents/42521104/RememberKnow_Judgments_Probe_Degrees_of_20160209-23588-ynkdb8.pdf?AWSAccessKeyId=AKIAIWOWYYGZ2Y53UL3A&amp;Expires=1498208075&amp;Signature=aT1BM5CdTW69ExiZ53j6Pbkk5Gk%3D&amp;response-content-disposition=inline%3B%20filename%3DRemember_Know_Judgments_Probe_Degrees_of.pdf" rel="nofollow noreferrer">a work</a> that suggests that <strong>asking people</strong> whether they remember or not <strong>is sensible</strong>. However, any further evidence would be great.</li>
<li>I think <a href="http://www.sciencedirect.com/science/article/pii/S1053810097903214" rel="nofollow noreferrer">Experiences of Remembering, Knowing, and Guessing</a> is also highly related.</li>
</ul>

<p>As this is a scientific work, references are highly appreciated.</p>

CC BY-SA 3.0
2017-06-23T08:09:54.197Z
Hi Pasbi, welcome at CogSci. An excellent question you've got there! I'm looking forward to an answer :)
Robin Kramer-ten Have
CC BY-SA 3.0
2017-06-23T08:10:26.900Z
see also http://psycnet.apa.org/index.cfm?fa=search.displayRecord&uid=2000-00111-015
pasbi
CC BY-SA 3.0
2017-06-23T09:21:01.330Z
Consider that time is a variable that affects retreival ([Power law of forgetting](https://memory.psych.upenn.edu/files/pubs/KahaAdle02.pdf)). Also one or two frames is enough to be used as a cue, use the video only to test the accuracy of the recall.
DesignerAnalyst
CC BY-SA 3.0
2017-06-26T07:34:21.687Z
When I show frames, I need to select them somehow. Since I use egocentric videos, it is likely that they are of bad quality (e.g. blurry).  How do you propose to test accuracy?
pasbi
CC BY-SA 3.0
2017-07-15T19:24:34.983Z
You need to do the dirty work first and get started searching for and reading papers in psychology and neuroscience. As you seem to be aware, your experiment should be rooted in the scientific literature. Ask a librarian how to search and what resources are available. If you are lucky, you will have access to Web of Knowledge. EBSCOHost also works sometimes as does APAs PsycNET. Locate the latest and the most cited research.
noumenal
<reference-request><methodology><episodic-memory>
Episodic Memory Decoding
pasbi
# Episodic Memory Decoding

(Asked by: username_0 on 2017-06-23)

I'm planning a study on memorability of episodic events.
Therefore, participants record a couple of hours of their daily life using an egocentric camera (encoding).
After a certain time, they are shown snippets from the recording and judge whether they remember it or not (decoding).

I don't have a psychological background, hence I have some questions:

* **How long should the snippets be?** Currently, we have 5sec videos, separated by 10sec margin.
  I know [chunking](https://en.m.wikipedia.org/wiki/Chunking_(psychology)), however, it happens in encoding phase, I'm looking for an equivalent in decoding.
* Maybe showing a few **frames** from the video is **better than** playing **video?**
* How long should the **time between encoding and decoding** be? Currently, it's 6 to 8 days. I'm aware of [Time Scale Similarity](https://en.m.wikipedia.org/wiki/Chunking_(psychology)).
* I've found [a work](http://s3.amazonaws.com/academia.edu.documents/42521104/RememberKnow_Judgments_Probe_Degrees_of_20160209-23588-ynkdb8.pdf?AWSAccessKeyId=AKIAIWOWYYGZ2Y53UL3A&Expires=1498208075&Signature=aT1BM5CdTW69ExiZ53j6Pbkk5Gk%3D&response-content-disposition=inline%3B%20filename%3DRemember_Know_Judgments_Probe_Degrees_of.pdf) that suggests that **asking people** whether they remember or not **is sensible**. However, any further evidence would be great.
* I think [Experiences of Remembering, Knowing, and Guessing](http://www.sciencedirect.com/science/article/pii/S1053810097903214) is also highly related.

As this is a scientific work, references are highly appreciated.

**Tags:** reference-request, methodology, episodic-memory

> **Comments:**
> **username_1**: Hi Pasbi, welcome at CogSci. An excellent question you've got there! I'm looking forward to an answer :)  
> **username_0**: see also http://psycnet.apa.org/index.cfm?fa=search.displayRecord&uid=2000-00111-015  
> **username_2**: Consider that time is a variable that affects retreival ([Power law of forgetting](https://memory.psych.upenn.edu/files/pubs/KahaAdle02.pdf)). Also one or two frames is enough to be used as a cue, use the video only to test the accuracy of the recall.  
> **username_0**: When I show frames, I need to select them somehow. Since I use egocentric videos, it is likely that they are of bad quality (e.g. blurry).  How do you propose to test accuracy?  
> **username_3**: You need to do the dirty work first and get started searching for and reading papers in psychology and neuroscience. As you seem to be aware, your experiment should be rooted in the scientific literature. Ask a librarian how to search and what resources are available. If you are lucky, you will have access to Web of Knowledge. EBSCOHost also works sometimes as does APAs PsycNET. Locate the latest and the most cited research.  

---

## 2 answers

### Answer by username_4 on 2017-07-03. Score: 1

The answers to your questions in your post would depend on the scope of your study. For example, with

> How long should the time between encoding and decoding be?

it would depend on what criteria is set within the scope of the study. If the people who are asking you to perform the study are asking for specific timescales then you need to stick to them and outline that in your report.

If however you have freedom to do so, as you seem to be asking on a psychological standpoint, it may be beneficial to test different timescales and maybe tabulate the results of memorability against time. You could even test different timescales against different ranges of emotional levels attached to the event.

For example,

**does a person remember a highly emotional episodic memory longer than a non-emotional one?**

**What about medium levels of emotions?**

You could also add to this with your question on how long snippets should be.

**Does a 5sec video snippet help someone to remember better than a single frame image?**

If you have the time and freedom to explore, you can conduct a large amount of research on memory. It would only be down to how wide you can make the scope of the study whilst keeping it within the remit of what you are trying to find out.


---

### Answer by username_5 on 2017-07-08. Score: 0

Episodic memory is probably the most complicated kind of memory, and a lot of these parameters are going to vary in interesting ways - for example, playing a video may result in better recall (what you call "decoding") because it preserves the temporal context of the memory. These things are interesting, and the way you treat them depends **entirely on the specific question you are interested in asking.**

There's a lot of parameters here that you're going to want to just test out (and report the results of in your paper!).

However, I want to leave you with a [study](http://www.pnas.org/content/112/35/11078.abstract) that may help guide your thinking. These authors did something similar, but were more interested in the neurophysiology - you might find some helpful context.


---

