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NOVA : A novel paradigm to study inattentional blindness Wu, Tiffany; Zeng, Ying; Rensink, Ronald A. 2020-04

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75346-Wu_T_et_al_NOVA_PURC_2020.pdf [ 175.45kB ]
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Printing:This poster is 48” wide by 36” high. It’s designed to be printed on a large-format printer.Customizing the Content:The placeholders in this poster are formatted for you. Type in the placeholders to add text, or click an icon to add a table, chart, SmartArt graphic, picture or multimedia file.To add or remove bullet points from text, click the Bullets button on the Home tab.If you need more placeholders for titles, content or body text, make a copy of what you need and drag it into place. PowerPoint’s Smart Guides will help you align it with everything else.Want to use your own pictures instead of ours? No problem! Just click a picture, press the Delete key, then click the icon to add your picture.NOVAA novel paradigm to study inattentional blindnessTiffany Wu, Ying Zeng| Dr. Ronald A. Rensink | University of British ColumbiaResearch Questions1. Is there a way for us to induce inattentional blindness (IB) robustly?2. Do unreported cues (IB trials) still have an effect on directing your attention?Motivation• Existing inattentional blindness paradigms are not robust• No within subject comparisons possible• What can we test with this paradigm?There are 3 parts to each trial:1. A/E letter discrimination task2. Corner distractor task3. Symbol detection task• 2 cue types: arrow: neutral:• We used 2 arrow cues to see how robust the arrow shape would be for cueing• Within-subjects manipulation: Cue (present/absent) X Cue Validity (valid/invalid/control)• Measurements: A/E accuracy, IB rate, RT• 2 conditions: • Arrow (N=28)• Double Arrow (N=23)MethodsFuture Directions• Experiment with more parameters to increase the power of this paradigm: changing sizes of cues, SOAs, etc...Results (2)Conclusion• We can induce robust inattentional blindness• This paradigm allows for direct comparisons between seen and unseen trials• Arrows are effective cues even when we do not see themMany have heard of the invisible gorilla experiment. This is an example of inattentional blindness, the failure to see/perceive a stimulus due to lack of attentionCueing occurs when the viewer’s attention is intentionally re-focused to another object.Condition Seen (z-test) Unseen (z-test)Arrow (N=14) 178.30 (.00081) 130.53 (.031)Double Arrow (N=14)152.48 (.017) 264.21 (.012)Effect sizes were significant in all conditions.We calculate cueing effect size by doing RT of invalid cues - RT of valid cues:Did the corners move in an IN-OUT-IN pattern?Did you see the letter A or E in the ring of letters?Did you see a symbol in the middle of the ring?Results (1)● Participants with less than 2 trials in each condition were excluded, leaving N=14 for the Arrow condition, and N=14 for Double Arrow.● This paradigm provides a way to induce inattentional blindness (IB) robustly: ● IB rate (across 2 conditions, N=28): 37.6%Fig 1. Cueing effects of each condition comparing the seen (hit) vs unseen (miss)


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