OLIVIA FOULDS DR DAWN WOOD UK OFFICIAL UK OFFICIAL The negative - - PowerPoint PPT Presentation

OLIVIA FOULDS DR DAWN WOOD

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The negative impact of nearby contours that interfere with and reduce visual discrimination when trying to focus on a target… Excess visual stimuli exceeds the limits of attentional resources and short-term memory, which results in a bottleneck that impairs

• bject perception (Levi, 2008).

UK OFFICIAL

The negative impact of nearby contours that interfere with and reduce visual discrimination when trying to focus on a target… Excess visual stimuli exceeds the limits of attentional resources and short-term memory, which results in a bottleneck that impairs

• bject perception (Levi, 2008).

UK OFFICIAL

The negative impact of nearby contours that interfere with and reduce visual discrimination when trying to focus on a target… Excess visual stimuli exceeds the limits of attentional resources and short-term memory, which results in a bottleneck that impairs

• bject perception (Levi, 2008).

UK OFFICIAL

The negative impact of nearby contours that interfere with and reduce visual discrimination when trying to focus on a target… Excess visual stimuli exceeds the limits of attentional resources and short-term memory, which results in a bottleneck that impairs

• bject perception (Levi, 2008).

UK OFFICIAL

UK OFFICIAL

UK OFFICIAL

UK OFFICIAL

Stay hydrated Maintain aerobic fitness

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And how does that make you feel?

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Design adaptive systems that can detect perceptual abilities in real-time, so appropriate accommodations can be implemented if an operator becomes less aware.

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A type of cognitive ability that involves how accurately someone can identify and compare what they see. Faster More accurate Less workload

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CURRENT PS TESTS

2 1 3

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Perceptual speed = process visual information Clutter = visual information to process increases

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Perceptual speed = process visual information Clutter = visual information to process increases

Behaviour + Clutter = Perceptual Speed ???

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MY EXPERIMENT

Users completed:

• 2 computerised

Perceptual Speed tests

• 4 generalised search tasks,

amidst various levels of clutter.

• 1. No Clutter
• 2. Relevant Clutter
• 3. Irrelevant Clutter
• 4. Mixed clutter ( 2 + 3)

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MY EXPERIMENT

Collected user data from:

• INTERACTION with system
• PERFORMANCE: Accuracy and

recall of target identification

• TIME on search task
• EXPERIENCE: workload,

confusion, tiredness Users completed:

• 2 computerised

Perceptual Speed tests

• 4 generalised search tasks,

amidst various levels of clutter.

• 1. No Clutter
• 2. Relevant Clutter
• 3. Irrelevant Clutter
• 4. Mixed clutter ( 2 + 3)

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EXPERIMENT RESULTS

All clutter = bad

• Longer to identify targets
• Significantly worse accuracy
• More confusion and tiredness

Especially LOW Perceptual Speed users

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EXPERIMENT RESULTS

All clutter = bad

• Longer to identify targets
• Significantly worse accuracy
• More confusion and tiredness

Especially LOW Perceptual Speed users

Avoid operators with low PS

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CAN WE PREDICT PERCEPTUAL SPEED FROM SEARCH BEHAVIOUR?

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CAN WE PREDICT PERCEPTUAL SPEED FROM SEARCH BEHAVIOUR? Yes we can, with up to 86% accuracy

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NEXT STEPS

How can we improve the model accuracy up to 100%? Apply the model in more real-life contexts to assess it’s reliability and validity Decide how systems should adapt when a user’s perceptual abilities reduce

1 2 3

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Public Access: Freedom of Information Act 2000 This document contains sensitive information as of the date provided to the original recipient by BAE Systems and the University of Strathclyde and is provided in confidence and which may be subject to exclusions from access request under various sections of the legislation. Following a request for this information, the public authority shall provide BAE Systems and the University of Strathclyde with a copy of the request as soon as practicable following receipt, and shall afford BAE Systems and the University of Strathclyde the opportunity to make written representations in relation to any such request with reasonable notice. BAE Systems and the University of Strathclyde shall also be given prior written notice of any proposed disclosure by the public authority of any of the information contained in this document, or of a summary of any of this information, whether in response to a freedom of information request or otherwise. Release of this information by a public authority without the prior written consent

• f BAE Systems and the University of Strathclyde may constitute an actionable breach of confidence.

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