HelexKids: a word frequency database for Greek and Cypriot primary school children

Aris R. Terzopoulos (Lead / Corresponding author), Lynne G. Duncan, Mark A. J. Wilson, Georgia Z. Niolaki, Jackie Masterton

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
261 Downloads (Pure)


In this article, we introduce HelexKids, an online written-word database for Greek-speaking children in primary education (Grades 1 to 6). The database is organized on a grade-by-grade basis,and on a cumulative basis by combining Grade 1 with Grades 2 to 6. It provides values for Zipf, frequency per million, dispersion, estimated word frequency per million, standard word frequency, contextual diversity, orthographic Levenshtein distance, and lemma frequency. These values are derived from 116 textbooks used in primary education in Greece and Cyprus, producing a total of 68,692 different word types. HelexKids was developed to assist researchers in studying language development educators in selecting age-appropriate items for teaching, as well as writers and authors of educational books for Greek/Cypriot children.
Original languageEnglish
Pages (from-to)83-96
Number of pages14
JournalBehavior Research Methods
Issue number1
Early online date28 Jan 2016
Publication statusPublished - Feb 2017


  • Word database
  • Greek language
  • Children
  • Frequency
  • Contextual diversity


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