EVIDENCE OF OBSERVER RELIABILITY FOR THE FAGAN TEST OF INFANT INTELLIGENCE (FTII)

To obtain estimates of observer reliability, the Fagan Test of Infant Intelligence (FTII) apparatus was modified to allow the infants' perfo rmance to be videotaped. Based upon results of 25 infants scored once during time of testing and again 2 years later using the videotape ver sion, interobserver and intraobserver reliabilities obtained for perce nt novelty preference (test rounds), total number of looks (familiariz ation and test rounds), and mean fixation duration (familiarization an d test rounds) were mostly very high for each round (M r = .92, SD = . 04). The videotaped infants' scores did not differ significantly from those of a comparable sample of infants who were rested using an unmod ified apparatus.