Concreteness norms were collected for 909 words using a seven point judgment scale, where each extremity highly represented the abstract or concrete levels, respectively. Results showed a bi-modal distribution suggesting that words may be classified either as concrete or abstract. The average reliability of the norms was r=0.97. Concreteness judgments were not influenced by sex, age, word written frequency or category size. The results indicate that concreteness may be considered as an independent word attribute.
concreteness; word norms; mental image
