3.2 data and information. overview understand the difference between information and data. discuss...
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3.2 Data and Information
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Overview
Understand the difference between information and data.
Discuss features important in form design such as: use of tick boxes, colour, font, position, instructions.
Identify advantages, disadvantages and applications for OMR and OCR.
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Data
Data is raw facts and figures.Data does not have meaning.
Examples:5
JohnA
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Information
Information is processed data that gives it meaning.
Examples:There are 5 cows in the field.My brother’s name is John.
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Gathering information
Method• Questionnaire• Observation• Reading documentation• Interview
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Gathering information
Source• Paper based• Computer based• Automated data capture
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Sources comparedPaper based Computer based Automated data capture
Humans enter the data Direct data capture method
Collected data is keyed into a computer
Data typed in directly onto an on-line form
Two methods available OCR and OMR
Prone to human error Less human error No processing errors
Instructions need to be clear
Marks need to be entered carefully
Time consuming if large volumes of data
Can cope with large volumes of data
Can cope with large volumes of data
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Font Instructions Colour Images Positioning Method of answering
Size Title Suitability Suitability Does not obscure
Space required
Intended audience
Prompts purpose Clarity Logical order Use of tick boxes
Clarity Purpose
Help
For each of the following features state the importance of considering them in form design.
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Samples of forms
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OMRAdvantages• Direct data capture method• High speed reading of large
volumes of data• Accurate: No processing
errors• Results can be processed
quickly• Very little staff training
required
Disadvantages• Forms require pre-printed
boxes• Forms need to be carefully
filled in• Requires specialised machinery to read the forms• A paper based system so
forms need to be carefullyhandled
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Sample OMR form
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OCR
Advantages
• Large quantities of text can be input quickly
• A paper based form can be turned into an electronic one
• It can read handwriting
Disadvantages• Handwriting needs to be
learnt by the computer• Systems are expensive
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Applications
OMR• National lottery• School attendance mark
sheets
OCR• Letter sorting• Digitising old books
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Acronyms
• OCR Optical Character Recognition• OMR Optical Mark Recognition