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Subjective ratings of age-of-acquisition: exploring issues of validity and rater reliability.

A new interesting article has been published in J Child Lang. 2018 Oct 23:1-15. doi: 10.1017/S0305000918000363. [Epub ahead of print] and titled:

Subjective ratings of age-of-acquisition: exploring issues of validity and rater reliability.

Authors of this article are:

Wikse Barrow C, Nilsson Björkenstam K, Strömbergsson S.

A summary of the article is shown below:

This study aimed to investigate concerns of validity and reliability in subjective ratings of age-of-acquisition (AoA), through exploring characteristics of the individual rater. An additional aim was to validate the obtained AoA ratings against two corpora – one of child speech and one of adult speech – specifically exploring whether words over-represented in the child-speech corpus are rated with lower AoA than words characteristic of the adult-speech corpus. The results show that less than one-third of participating informants’ ratings are valid and reliable. However, individuals with high familiarity with preschool-aged children provide more valid and reliable ratings, compared to individuals who do not work with or have children of their own. The results further show a significant, age-adjacent difference in rated AoA for words from the two different corpora, thus strengthening their validity. The study provides AoA data, of high specificity, for 100 child-specific and 100 adult-specific Swedish words.

Check out the article’s website on Pubmed for more information:



This article is a good source of information and a good way to become familiar with topics such as:

age-of-acquisition;corpus linguistics;lexical development

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