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BELL SYSTEM TECHNICAL JOURNAL 



be combined into syllables. For the purpose of this investigation 

 they were combined into mono-syllables of the simple types con- 

 sonant-vowel, vowel-consonant, and consonant-vowel-consonant. 



To eliminate memory efTects every possible combination of the 

 sounds into these types of syllables was used unless there was a good 

 reason for excluding it. The complete list contained 8700 syllables. 

 For convenience of testing these syllables were divided into groups 

 of fifty. Each group contained the same kind and number of syllable 

 forms and an equal number of each of the fundamental vowel and 

 consonant sounds. 



Table II. 



Speech-sound Testing List. List No. i6o 



To illustrate the technique of articulation testing a sample list 

 is given in Table II. fn the first column the syllable is given in its 

 phonetic form. A key-word showing how each syllable is pro- 

 nounced is given in the second column. These syllables were written 

 on cards which were shuffled each time before they were used, so 

 that the order in which they were pronounced was entirely hap- 

 hazard. One hundred and seventy-four similar lists were used in 

 this work. In order to eliminate personal peculiarities, several 



