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Evaluating assessment performance
Mikko Pohjola, THL
23/05/2017
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Contents
• Eye opener
• Purpose <-> performance
• Contemporary conventions
– Uncertainty analysis
– Quality assurance/control
• Properties of good assessments
• Evaluation of performance
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Analogy
• What is/would be a good mobile phone for you?
– What features are important?
Analogy
• Consider you are a mobile phone manufacturer (say
Nokia) - what would you think were a good mobile
phone then?
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Where do mobile phones come
from?
• Factory -> warehouse -> store -> use
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Assembly (components + code + covers)
Mass production, mass customization
Packaging
Logistics
Marketing (advertising, market analysis, …)
Use environment
Design
• What does this have to do with the topic of this
lecture?
Assessment
• Dual purpose of assessments:
– Meeting the needs of use (societal decision making,
policy)
– Striving for truth (science)
• Both requirements must be met simultaneously
– not easy, but possible
• A business of creating understanding about reality
– Making right questions
– Providing good answers
– Delivering the answers (and questions) to use
Performance (goodness)
• Performance of something can only be evaluated
according to its purpose!!!
• What is the purpose of assessments?
– Satisfying the information need of intended use
• Meeting the need
• Truthlikeness of the information
Contemporary conventions
• Uncertainty analysis
– Basically: what is the exactness of the answer
provided as the outcome of an assessment?
– Multiple applications and extensions of concept
– Product-oriented
• Quality assurance/control
– Through which steps should an assessment be
conducted in order to get good outcomes?
– Process-oriented
Environmental health assessment
Process
requirement
Product
requirement
Assessment
Assessment
process
Knowledge
need
Use
Assessment
product
Decision making
Properties of good assessment
• Quality of content
• Applicability
• Efficiency
Properties of good assessments
• How good is the information (Quality of content)?
– Informativeness and calibration
– Relevance
• How well does it transfer into use (Applicability)?
– Usability
– Availability
– Acceptability
• How much effort is spent (Efficiency)?
• What would these mean in the context of
making/using mobile phones?
Evaluation of performance
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informativeness and calibration – result
relevance - scope (vs. need)
usability – organization, appearance, implementation
availability – (observable) access to information
acceptability of premises - (assumed) acceptance of premises
by intended users, or others interested, or affected
• acceptability of process – evaluation of definition → peer
review = outsourced evaluation
• efficiency – measurement of spent effort (given outcome)
Properties of good assessments
• Uncertainty analysis + quality assurance/control +
functionality in use + efficiency of production
• Reviewing past assessments (a posteriori)
• Guiding design and execution of on-going
assessments (a priori)
• Applicability secondary to quality of content
• Efficiency depends on quality of content and
applicability
Properties of good assessments
• Different points of reference
– Which relate to need/use?
– Which relate to truth?
Evaluation of performance
• How much is the framework built in to open
assessment and opasnet?
• What are the methods to do evaluation in practice?
– Jouni, anything you want to say about this?
– Comments anyone?
– Consider this in the exercises and discussion!
• uncertainty analysis, discrepancy analysis
between result and another estimate (assumed
as a golden standard)
• (assumed) intended user opinion, participant
rating for (technical) quality of information
objects
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