• Understand the distinction between accuracy of information and validity of data
   

• Explain possible sources and types of error in data capture, transcription, transmission and processing.
   

• Describe methods of preventing and reducing such errors.
   

• Describe appropriate validation techniques for various types of data processing, from data capture to report generation.
   

See the books page for more details about the titles listed below

Mott & Leeming - Ch. 12

Heathcote - Ch.16

Doyle - Pgs 91 - 95

McWeeney - Pgs 6 - 11 (AS02)

AQA past papers
Past papers. Not as useful as the Psionica database AQA shamefully closed but...

Practice questions
More practice questions for 11.2 (.rtf file - opens in Word/Writer)

Past paper answers
Answers to the questions above. Password protected .doc file. Sorry but the password is only available to teachers.

Older Exam Papers
Past papers (pre 2000) not included on the official AQA site from Colchester VI Form College. These still contain some relevant questions for this topic.

Links to general online resources for 11.2. I'd recommend right clicking links/icons and "Save Target As..." for anything other than web pages (see key below)

	Flash Notes
Steve Longley's excellent online flash notes for 11.2 - Verification & validation. I think this link has gone now?? Download the notes directly from the link below.
	Flash Notes
Offline version of the above.  Right click link and Save Target As...
	Verification & Validation
An excellent handout covering all aspects of this topic from the very very nice people at OCRICT. Is Ashfordman a person like Spiderman or Batman?
	Validation
PowerPoint presentation. I think I did this originally but it ended up at the KJS?!? It's a small world. Anyway it's pretty good...
	Validation & Verification
A nice set of summary notes and questions for this topic from Deepak Gautam (Mr. G!) of Wolverhampton College.
	Interactive Diagram
A little online exercise to test your knowledge about different types of validation check.
	Teach-ICT Verification & Validation
Mini website from the excellent Teach-ICT site. There's a nice homework task to go with this link. I think I'm in love with Mrs Jones?
	Roger the Beaver explains validation!
FatMax's furry friend from ICTGCSE explains it all in words of one syllable! Unfortunately doesn't contain any swearing :(
	Introduction to 11.2
Introduction to verification and validation from Kesgrave High School. As usual this is very very good stuff from Rob Cawley. Whatever happened to him?
	Revision Questions
Handout containing a couple of older exam type questions. Suitable for homework, revision, blah de blah de blah.
	ISBN Check Digits
Thingy about structure of ISBNs shows how the check digit is calculated using modulus 11. Thanx to Jayney for link.
	11.2 Verification & Validation
Summary notes and questions from North Chadderton High School. Recommended by FatMax.
	Validation in Practice
Cool example of range checks in Excel from Kegrave High School. Also useful for ICT3.
	CRCs explained
Cyclic redundancy checks explained in detail. You don't have to understand it all but it helps to know why that file you downloaded wont open!

Key to resources:

PowerPoint presentation Word file Web page Macromedia Flash