Word associations to each of the 26 letters of the alphabet were obtained under procedures of single association or continued associations for both upper- and lower-case letters. The results showed a significant relationship between m values and measures of frequency of letters, preferences for letters, and vocal reaction time to letters. The data also showed that m values for each letter were stable within a session. Analyses of the most frequent associations showed a high degree of consistency among the common associations for the single and continued instructional procedures and upper- and lower-case stimulus presentations of the letters. {\textcopyright} 1965 Academic Press Inc. All rights reserved.