catknowledge: Category knowledge and change detection
In mark-andrews/isdsr-pkg: Tools and Datasets to Accompany ISDSR Textbook

catknowledge

R Documentation

Category knowledge and change detection

Description

Infants (n=24) were divided into two experimental condition groups. One group (n=12) were shown objects of familiar categories (e.g., balls, bottles, cars). The other group (n=12) were shown objects of unfamiliar categories (e.g., feather, guitar, hedgehog). In both groups, on each experimental trial, the object was occluded and when it reappeared it was either unchanged, changed for a different object of the same category, or change for an object of a different category. The research focus of the experiment was the extent to which the change (or lack of change) affected the amplitude of the negative central wave (Nc) event related potential (ERP), which is believed to be a signal of change detection in infants.

Format

A data frame with 72 rows and 4 variables

id: (factor) Identifier of participant (a 12 month old infant) in experiment.
category: (factor) Between subjects experimental condition indicating if the objects were visible or occluded.
change: (factor) The within-subjects experimental condition that describes how the stimulus object changes, with values no (no change to stimulus), within (the stimulus changes to another exemplar of the same category), across (the stimulus changes to another category).
nc_erp: (numeric) The negative central wave (Nc) event related potential (ERP) amplitude. The NC ERP is an ERP that occurs in infants at frontocentral sites following modifications in a stimulus's appearance.

Details

This data is from Experiment 1 in the paper "Nonverbal category knowledge limits the amount of information encoded in object representations: EEG evidence from 12-month-old infants" by Pomoiechowska and Gliga (2021). \insertCitepomiechowska2021nonverbalisdsr.