
New research delves into how children build their vocabularies and what words are easiest for them to learn. The scientists worked with 32 children who were all 2 years old, studying their word development by testing their existing knowledge through a computer program that shows images on a screen of items that are likely familiar to toddlers. Since 2 year olds are not always communicative, they also employed eye tracking technology to see which images the children recognized when tested.
http://www.sciencedaily.com/releases/2015/10/151012132455.htm