The NSMRL tri-word test of intelligibility (TTI)a)b).

continued preserves, moreover, the effects of gross temporal distortions and masking that occur within and between words in consecutive discourse. Discrimination scores for the tri-word test of intelligibility (TTI) as compared with the Modified Rhyme Test (MRT) and the C.I. D. sentence lists all taped with the same talker were lower when tested in quiet and even relatively lower in noise. The multiple-choice closed-set response permits easy administration, scoring, and analysis of confusions; enunciation of three semantically unrelated words in coarticulatory succession preserves interword transitions while limiting the effects of memory and linguistic redundance. The use of the DAT lists permits a somewhat more detailed analysis of errors than use of the three-word formant with the MRT as proposed by Williams : et al (Aviat. Space & Environ. Med. 47, 154-158 (1976). The NSMRL TTI is proposed when ■-. relatively ease of administration and scoring are desirable.