<p>You could call it a 2 by 2 mixed design where condition is a between-subjects factor and has two levels (intervention, no intervention) and time is a within-subjects factor and has two levels (time 1 and time 2).</p>

<p>Regarding how to analyse this data, check out this question on <a href="https://stats.stackexchange.com/questions/3466/best-practice-when-analysing-pre-post-treatment-control-designs">Best practice when analysing pre-post treatment-control designs</a>.</p>

CC BY-SA 3.0
2016-11-14T23:10:35.767Z
2016-11-14T23:10:35.767Z
2017-04-13T12:44:18.443Z
Jeromy Anglim
<p>I managed to get myself confused on this one. 
So I am planning to conduct an experiment within an organization. I want to explore effects of recognition on people's motivation. Recognition will be in a form of personalised recognition letter. Experimental group will receive the letter, control group won't. </p>

<p>I wanted to measure levels of intrinsic and extrinsic motivation in both groups prior to the intervention, and then post-intervention. </p>

<ul>
<li>my IVs: intervention/no intervention; time period 1/time period 2</li>
<li>my DV: motivation </li>
</ul>

<p>Questions:</p>

<ul>
<li>is it independent groups design and I will need factorial ANOVA? Or time doesn't count as a variable?</li>
<li>or maybe I don't need to measure motivation levels before at all?  </li>
</ul>

CC BY-SA 3.0
2016-11-15T06:49:09.997Z
I'm voting to close this question as off-topic because the question is purely statistical and, therefore, is a better fit for [stats.se].
Robin Kramer-ten Have
<terminology><methodology><statistics>
Two time points, control and experimental groups: What design is it?
Veronika Pisarieva
# Two time points, control and experimental groups: What design is it?

(Asked by: username_0 on 2016-11-14)

I managed to get myself confused on this one.
So I am planning to conduct an experiment within an organization. I want to explore effects of recognition on people's motivation. Recognition will be in a form of personalised recognition letter. Experimental group will receive the letter, control group won't.

I wanted to measure levels of intrinsic and extrinsic motivation in both groups prior to the intervention, and then post-intervention.

* my IVs: intervention/no intervention; time period 1/time period 2
* my DV: motivation

Questions:

* is it independent groups design and I will need factorial ANOVA? Or time doesn't count as a variable?
* or maybe I don't need to measure motivation levels before at all?

**Tags:** terminology, methodology, statistics

> **Comments:**
> **username_1**: I'm voting to close this question as off-topic because the question is purely statistical and, therefore, is a better fit for [stats.se].  

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## 1 answers

### Answer by username_2 on 2016-11-14. Score: 1

You could call it a 2 by 2 mixed design where condition is a between-subjects factor and has two levels (intervention, no intervention) and time is a within-subjects factor and has two levels (time 1 and time 2).

Regarding how to analyse this data, check out this question on [Best practice when analysing pre-post treatment-control designs](https://stats.stackexchange.com/questions/3466/best-practice-when-analysing-pre-post-treatment-control-designs).


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