OLIVIA FOULDS DR DAWN WOOD UK OFFICIAL
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 object 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 object 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 object 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 object perception (Levi, 2008). UK OFFICIAL
UK OFFICIAL
UK OFFICIAL
UK OFFICIAL
Stay hydrated Maintain aerobic fitness UK OFFICIAL
And how does that make you feel? UK OFFICIAL
Design adaptive systems that can detect perceptual abilities in real-time , so appropriate accommodations can be implemented if an operator becomes less aware . UK OFFICIAL
A type of cognitive ability that involves how accurately someone can identify and compare what they see. Faster More accurate Less workload UK OFFICIAL
CURRENT PS TESTS 1 2 3 UK OFFICIAL
Perceptual speed = process visual information Clutter = visual information to process increases UK OFFICIAL
Perceptual speed = process visual information Clutter = visual information to process increases Behaviour + Clutter = Perceptual Speed ??? UK OFFICIAL
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) UK OFFICIAL
MY EXPERIMENT Users completed: Collected user data from: • 2 computerised • INTERACTION with system Perceptual Speed tests • PERFORMANCE: Accuracy and • 4 generalised search tasks, recall of target identification amidst various levels of • TIME on search task clutter. • EXPERIENCE: workload, 1. No Clutter confusion, tiredness 2. Relevant Clutter 3. Irrelevant Clutter 4. Mixed clutter ( 2 + 3) UK OFFICIAL
EXPERIMENT RESULTS All clutter = bad Longer to identify targets Especially LOW Perceptual Speed users Significantly worse accuracy More confusion and tiredness UK OFFICIAL
EXPERIMENT RESULTS All clutter = bad Longer to identify targets Especially LOW Perceptual Speed users Significantly worse accuracy More confusion and tiredness Avoid operators with low PS UK OFFICIAL
CAN WE PREDICT PERCEPTUAL SPEED FROM SEARCH BEHAVIOUR? UK OFFICIAL
CAN WE PREDICT PERCEPTUAL SPEED FROM SEARCH BEHAVIOUR? Yes we can, with up to 86% accuracy UK OFFICIAL
NEXT STEPS 1 How can we improve the model accuracy up to 100%? 2 Apply the model in more real-life contexts to assess it’s reliability and validity 3 Decide how systems should adapt when a user’s perceptual abilities reduce UK OFFICIAL
UK OFFICIAL
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 of BAE Systems and the University of Strathclyde may constitute an actionable breach of confidence. UK OFFICIAL
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