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Face recognition with ambient images- Oddball visual search tasks

These tasks were developed for research which aimed to measure face recognition ability on tasks with minimal memory demands. The tasks present ambient images of White Caucasian faces. Trials begin when a large cross appears, dividing the participants' display into four quadrants. After 1000 ms, four ambient images appear on the display, one in each quadrant, On each trial, three of the ambient images depict the same person. The fourth 'oddball' image depicts a different person of broadly similar appearance. These four images are presented for 5000 ms. During this time particpants are asked to identify which of the four images is the oddball. After 5000 ms, the ambient images disappear and are replaced with a response screen. Participants indicate which of the four images was the oddball by pressing the corresponding number on their keyboard.

Both versions of the task contains 40 experimental trials presented in a randomised order (20 females, 20 males). All 160 ambient images (80 female, 80 male) have been sourced online from various websites. An opportunity to take short breaks during the trials is also included (after 10, 20 and 30 trials). Practice trials are also included. These have the same format as the experimental trials, however images of cartoon characters have been used. Four attention check trials are also interspersed within the experimental trials, these have an identical format to the practice trials.

A calibration procedure is also included at the start of the experiment. All tasks must be completed on a PC.

These tasks are described in detail in: Gehdu, B. K., Gray, K. L., & Cook, R. (2022). Impaired grouping of ambient facial images in autism. Scientific Reports, 12(1), 6665.

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Oddball Visual Search Task- Version 1

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Oddball Visual Search Task- Version 2

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Gorilla Open Materials Attribution-NonCommerical Research-Only

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Preferred Citation Gehdu, B. K., Gray, K. L., & Cook, R. (2022). Impaired grouping of ambient facial images in autism. Scientific Reports, 12(1), 6665.
https://www.nature.com/articles/s41598-022-10630-0
Conducted at Birkbeck, University Of London, UK.
Published on 09 December 2021
Corresponding author Bayparvah Kaur Gehdu PhD Student
Psychological Sciences
Birkbeck University of London

bgehdu01@mail.bbk.ac.uk