Abstract：
:The purpose of this study was to investigate the effect of dot speed and dot density on the development of global motion perception by comparing the performance of adults and children (5-6years old) on a direction-discrimination task. Motion coherence thresholds were measured at two dot speeds (1 and 4deg/s) and three dot densities (1, 15, 30dots/deg(2)). Adult coherence thresholds were constant at approximately 9%, regardless of speed or density. Child coherence thresholds were significantly higher across conditions, and were most immature at the slow speed and at the sparse density. Thus, the development of global motion perception depends heavily on stimulus parameters. This finding can account for some of the discrepancy in the current developmental literature. Our results, however, caution against making general claims about motion deficits in clinical populations based on only a single measurement at a specific combination of speed and density.
journal_name
Vision Resjournal_title
Vision researchauthors
Narasimhan S,Giaschi Ddoi
10.1016/j.visres.2012.02.016subject
Has Abstractpub_date
2012-06-01 00:00:00pages
102-7eissn
0042-6989issn
1878-5646pii
S0042-6989(12)00101-0journal_volume
62pub_type
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