Steffens M L, Eilers R E, Gross-Glenn K, Jallad B
Department of Psychology, University of Miami, FL.
J Speech Hear Res. 1992 Feb;35(1):192-200. doi: 10.1044/jshr.3501.192.
Speech perception was investigated in a carefully selected group of adult subjects with familial dyslexia. Perception of three synthetic speech continua was studied: /a/-/e/, in which steady-state spectral cues distinguished the vowel stimuli; /ba/-/da/, in which rapidly changing spectral cues were varied; and /sta/-/sa/, in which a temporal cue, silence duration, was systematically varied. These three continua, which differed with respect to the nature of the acoustic cues discriminating between pairs, were used to assess subjects' abilities to use steady state, dynamic, and temporal cues. Dyslexic and normal readers participated in one identification and two discrimination tasks for each continuum. Results suggest that dyslexic readers required greater silence duration than normal readers to shift their perception from /sa/ to /sta/. In addition, although the dyslexic subjects were able to label and discriminate the synthetic speech continua, they did not necessarily use the acoustic cues in the same manner as normal readers, and their overall performance was generally less accurate.
在一组经过精心挑选的患有家族性诵读困难的成年受试者中，对言语感知进行了研究。研究了三种合成语音连续体的感知：/a/-/e/，其中稳态频谱线索区分元音刺激；/ba/-/da/，其中快速变化的频谱线索有所不同；以及/sta/-/sa/，其中一个时间线索，即静音持续时间，被系统地改变。这三种连续体在区分成对语音的声学线索性质方面存在差异，被用于评估受试者使用稳态、动态和时间线索的能力。诵读困难者和正常阅读者针对每个连续体参与了一项识别任务和两项辨别任务。结果表明，与正常阅读者相比，诵读困难的阅读者需要更长的静音持续时间才能将他们的感知从/sa/转变为/sta/。此外，尽管诵读困难的受试者能够对合成语音连续体进行标记和辨别，但他们不一定以与正常阅读者相同的方式使用声学线索，并且他们的整体表现通常不太准确。
