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Jacobsen, Karl; Grottland, Havar; Flaten, Magne Arve – American Journal on Mental Retardation, 2001
Assessment of visual acuity, using Teller Acuity Cards, was combined with observations of behavioral state to indicate central nervous system activation in 24 individuals with mental retardation. Results indicate that forced-choice preferential-looking technique can be used to test visual acuity in this population unless the participant is drowsy.…
Descriptors: Children, Evaluation Methods, Mental Retardation, Neurology
Peer reviewedBane, M. C.; Birch, E. E. – Journal of Visual Impairment and Blindness, 1992
As follow up to a study which compared forced-choice preferential looking (FPL) with pattern visual evoked potential (VEP), this study increased the VEP success rate and improved agreement between the FPL and VEP acuity estimates by using horizontal bar stimuli for young preverbal children (n=17) with nystagmus. (Author/DB)
Descriptors: Evaluation Methods, Followup Studies, Partial Vision, Preschool Children
