Table 1.
Mean age, standard deviation and age range for all three age groups.
Fig 1.
Novel objects (taken from [41]).
Fig 2.
Familiar objects.
Table 2.
Mean reaction times and standard deviations before (unadjusted) and after (adjusted) outlier removal, split by age group.
Fig 3.
Reaction time for correct responses in the familiar, 2-AFC and 4-AFC test phases, split by age group and condition, with outliers (> 2 SD) removed.
Table 3.
LMM results for reaction time with condition * age interaction split by test phase.
Fig 4.
Accuracy in the familiar, 2-AFC and 4-AFC test phases, split by condition and age. Dashed line represents chance (.5) in the familiar and 2-AFC test phases, dotted line represents chance (.25) in the 4-AFC test phase.
Table 4.
Model results for accuracy.
Fig 5.
Each video was split into 200 ms chunks and rated as either looking at the "left" or "right" (side of the screen), "indeterminable", or "away" (from the screen). Written consent for publication of the participating child’s pictures was obtained from the caregiver.
Fig 6.
Proportion of looks at the target in the learning phase, time-locked to the labelling of the selected novel object.
Dashed line represents chance (0.5).
Fig 7.
Proportion of looks at the target in familiar trials, time-locked to the onset of the target word.
Dashed vertical line at 200 ms marks the beginning of the analysis window, dashed horizontal line represents chance (0.5).
Fig 8.
Proportion of looks at the target in 2-AFC trials, time-locked to the onset of the target word.
Dashed vertical line at 400 ms marks the beginning of the analysis window, dashed horizontal line represents chance (0.5).
Table 5.
Mean reaction times and standard deviations before (unadjusted) and after (adjusted) outlier removal, split by condition.
Fig 9.
Reaction time for correct responses in the familiar, 2-AFC and 4-AFC test phases, split by condition, with outliers (< 2SD and > 2 SD) removed.
Table 6.
LMM results for RT.
Fig 10.
Accuracy in the familiar, 2-AFC and 4-AFC test phases, split by condition. Dashed line represents chance (.5) in the familiar and 2-AFC test phases, dotted line represents chance (.25) in the 4-AFC test phase.
Table 7.
Model results for accuracy.