changingminds.org

How we change what others think, feel, believe and do

| Menu | Quick | Books | Share | Search | Settings |

Separate Pre-Post Samples design

 

Explanations > Social Research > Design > Separate Pre-Post Samples design

Description | Example | Discussion | See also

 

Description

This method is used when groups are being examined but where successive measurements cannot be sure of measuring the same people. For example entire companies or gangs.

The approach is simply to take a different sample, from both the target and control groups, for pre-tests and post-tests.

In design notation, this can be written as:

 

N1 O    
N1   X O
N2 O    
N2     O

 

Example

A researcher is examining the effects of a management method in temp agencies. She selects two secretarial agencies for study, with N1 as the treatment agency and N2 as the control. An initial survey of a sample of temporary workers is done before the managers in the treatment agency are coached over several months. The subsequent post-test is of a different sample shows the retention rate has increased by a significant amount as compared with the control agency.

Discussion

The assumption on which this test is founded is that people within each of the overall groups being assessed (the target and control) are relatively similar.

Different samples are taken from the control group also to measure at the same time as the treatment groups and hence counter any effects such as learning and wider population shifts over time.

The Separate Pre-Post Samples design is a quasi-experiment.

See also

Control-group design

Site Menu

| Home | Top | Quick Links | Settings |

Main sections: | Disciplines | Techniques | Principles | Explanations | Theories |

Other sections: | Blog! | Quotes | Guest articles | Analysis | Books | Links | Help |

More pages: | Contact | Caveat | About | Students | Webmasters | Awards | Guestbook | Feedback | Sitemap | Changes |

Settings: | Computer layout | Mobile layout | Small font | Medium font | Large font |

 

You can buy books here

More Kindle books:

And the big
paperback book


Look inside

 

Please help and share:

 

Quick links

Disciplines

* Argument
Brand management
* Change Management
Coaching
+ Communication
Counseling
+ Game Design
+ Human Resources
+ Job-finding
* Leadership
+ Marketing
Politics
+ Propaganda
+ Rhetoric
* Negotiation
* Psychoanalysis
* Sales
Sociology
+ Storytelling
+ Teaching
* Warfare
Workplace design

Techniques

+ Assertiveness
* Body language
* Change techniques
* Closing techniques
+ Conversation
Confidence tricks
* Conversion
* Creative techniques
* General techniques
+ Happiness
+ Hypnotism
+ Interrogation
* Language
+ Listening
* Negotiation tactics
* Objection handling
+ Propaganda
* Problem-solving
* Public speaking
+ Questioning
+ Using repetition
* Resisting persuasion
+ Self-development
+ Sequential requests
Stress Management
* Tipping
Using humor
* Willpower

Principles

+ Principles

Explanations

* Behaviors
+ Beliefs
* Brain stuff
Conditioning
+ Coping Mechanisms
+ Critical Theory
+ Culture
+ Decisions
* Emotions
+ Evolution
Gender
+ Games
Groups
Habit
+ Identity
+ Learning
+ Meaning
Memory
+ Motivation
+ Models
* Needs
+ Personality
+ Power
* Preferences
+ Research
+ Relationships
+ SIFT Model
+ Social Research
Stress
+ Trust
+ Values

Theories

* Alphabetic list
* Theory types

And

- About
- Guest Articles
- Blog!
- Books
- Changes
- Contact
- Guestbook
- Links
- Quotes
- Students
- Webmasters

 

| Home | Top | Menu | Quick Links |

Changing Minds 2002-2014
Massive Content -- Maximum Speed