Saccadic movements using eye-tracking technology in individuals with autism spectrum disorders: pilot study.

Abstract:

OBJECTIVE:To verify differences in the visual scanning strategies between pervasive developmental disorders (PDD) and controls when they are observing social and non-social pictures. METHOD:PDD group (PDDG) comprised by 10 non-retarded subjects (age from 4 to 41) and age-matched control group (CG). Nine social pictures with human beings (including two pictures of cat mask), and 3 nonsocial pictures of objects were presented for 5 seconds. Saccadic movements and fixation were recorded with equipment EyeGaze (LC Technologies Inc.). RESULTS:PDDG (mean=292.73, SE=67.62) presented longer duration of saccadic movements for social pictures compared to CG (mean=136.06, SE=14.01) (p=0.04). The CG showed a higher number of fixations in the picture 7 (a women using a cat mask, with the eyes erased) (CG: mean=3.40; PDDG: mean=1.80; p=0.007). CONCLUSION:The results suggest differences in strategies that PDD explore human picture. Moreover, these strategies seem not to be affected by the lack of expected part of the face (the eyes).

journal_name

Arq Neuropsiquiatr

authors

Mercadante MT,Macedo EC,Baptista PM,Paula CS,Schwartzman JS

doi

10.1590/s0004-282x2006000400003

subject

Has Abstract

pub_date

2006-09-01 00:00:00

pages

559-62

issue

3A

eissn

0004-282X

issn

1678-4227

pii

S0004-282X2006000400003

journal_volume

64

pub_type

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