Variable interval and variable ratio? - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
USMLE Articles
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam

Thread Tools Search this Thread Display Modes
Old 12-06-2010
schiwei's Avatar
USMLE Forums Scout
Steps History: Not yet
Posts: 81
Threads: 51
Thanked 48 Times in 19 Posts
Reputation: 47
Psyche Variable interval and variable ratio?


What is the difference between variable ratio and variable interval? Thanks!
Reply With Quote Quick reply to this message

Old 12-06-2010
ashishkabir's Avatar
USMLE Forums Master
Steps History: 1+CK+CS+3
Posts: 625
Threads: 19
Thanked 404 Times in 240 Posts
Reputation: 424

Variable interval:

You work at a factory and one week you get your paycheck on Friday and then you don't get a check for 3 weeks but you continue working and then all of a sudden you get a check on Tuesday and then again on Thursday of that week.

I.E. the frequency of the reward varies with time.

Variable ratio:

You work at a factory and you get paid the first time when you complete 20 tasks and then second time when you complete 15 tasks after that and the third time when you complete another 22 tasks and then again after 27 tasks etc. etc.

I.E. the frequency of the reward varies based on number of units but not in a regular fashion.

Variable ratio is the best reward program to ensure maximum productivity. A good example of this in real life involves buying lottery tickets. You may not win the first 100 times but you always think you may win the next time so you keep buying tickets.
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (12-06-2010), drortho (12-08-2011), Sabio (12-06-2010), schiwei (12-07-2010)



Quick Reply

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Where you live. Leave blank if you don't want to tell.


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Likelihood Ratio kalpana USMLE Step 1 Forum 2 02-17-2016 10:24 AM
Odds Ratio rasheed USMLE Step 1 Mnemonics 4 04-28-2011 09:28 PM
Forward to Regurgitant Flow Ratio futureresident USMLE Step 1 Forum 10 02-18-2011 07:41 AM
ERAS interview / application ratio StepTaker IMG Residency Match Forum 8 09-04-2010 11:14 PM
95% Confidence Interval just_md USMLE Step 1 Forum 3 05-20-2010 04:10 AM

Find Us on Facebook
Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2019)