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, 77 (3), 680-95

Infants' Attention to Patterned Stimuli: Developmental Change From 3 to 12 Months of Age

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Infants' Attention to Patterned Stimuli: Developmental Change From 3 to 12 Months of Age

Mary L Courage et al. Child Dev.

Abstract

To examine the development of look duration as a function of age and stimulus type, 14- to 52-week-old infants were shown static and dynamic versions of faces, Sesame Street material, and achromatic patterns for 20 s of accumulated looking. Heart rate was recorded during looking and parsed into stimulus orienting, sustained attention, and attention termination phases. Infants' peak look durations indicated that prior to 26 weeks there was a linear decrease with age for all stimuli. Older infants' look durations continued to decline for patterns but increased for Sesame Street and faces. Measures of heart rate change during sustained attention and the proportion of time spent in each phase of attention confirmed infants' greater engagement with the more complex stimuli.

Figures

Figure 1
Figure 1
Mean heart-rate change as a function of seconds following stimulus onset during the heart-rate defined attention phases (from Richards & Casey, 1991, 1992).
Figure 2
Figure 2
Mean peak look durations for static and dynamic versions on each stimulus type (faces, achromatic dots, achromatic angles, Sesame Street) as a function of age.
Figure 3
Figure 3
Estimated curve fits from multiple regression analyses of the peak-look duration measures for the three grouped stimulus types: faces, achromatic geometric patterns, Sesame Street material.
Figure 4
Figure 4
The mean amount of heart rate (interbeat interval) change during the phase of sustained attention for each of the stimulus types as a function of age.
Figure 5
Figure 5
Mean amount of heart rate (interbeat interval) change that infants showed to static and dynamic versions of the stimulus types.
Figure 6
Figure 6
Proportion of time that infants spent in each of the phases of attention during presentation of the three stimulus groups (faces, achromatic geometric patterns, Sesame Street). Note: OR = stimulus orienting, SA = sustained attention, AT = attention termination

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