Data from a simple 2-alternative forced choice (2AFC) word recognition task administered to 19- and 24-month-olds. On each trial, infants were shown a picture of an animate object (e.g., a horse) and an inanimate object (e.g., a spoon). After inspecting the images, they disappeared and they heard a label referring to one of them (e.g., "The horse is nearby!"). Finally, the objects re-appeared on the screen and they were prompted to look at the target (e.g., "Look at the horse!").
A data frame with 53940 rows and 10 variables:
Uniaue participant ID
M or F
Age, in months
Unique Trial Number
Name of item shown on trial (also unique for each participant)
Time within trial
Subphase within trial (see above)
Time within subphase
Which AOI are they looking at
Are they looking at the animate AOI?
Are they looking at the inanimate AOI?
Does current sample not have valid tracking data?
Total vocabulary score on MCDI
Noun vocabulary score on MCDI
Verb vocabulary score on MCDI
Ferguson, B., Graf, E., & Waxman, S. R. (2014). Infants use known verbs to learn novel nouns: Evidence from 15- and 19-month-olds. Cognition, 131(1), 139-146.