Lexical frequency and orthographic neighbourhood are two very important variables in experiments on word recognition. In this paper, we present a normative study which includes all four letters words selected from a corpus of over 5 million words. The word frequency, the number and relative neighbourhood frequency, acumulative neighbourhood...

The no-words selection is important in lexical decision task. The similarity between no-words and words determine the recognition time to no-words, when the no-words are similarity to high frequency words the response time is highter than in the opposite case. In this paper, we present a no-words base where the similar words number, the...