title: Live vs. video observation in forced-choice preferential looking: a comparison of methods.
abstract: Visual acuity was measured in infants with the forced-choice preferential looking technique, using videotaped material from live observations. There was excellent agreement between the acuity values estimated with the two procedures, suggesting that observations on videotaped material can replace "live" observations in the estimation of visual functions in infancy.
authors.affiliation: Max-Planck-Institute for Brain Research, Frankfurt am Main, Germany
authors.initials: RH
authors.lastname: Sireteanu
authors.initials: BH
authors.lastname: Neu
authors.initials: MH
authors.lastname: Fronius
authors.initials: DH
authors.lastname: Constantinescu