Streeter L A
J Acoust Soc Am. 1978 Dec;64(6):1582-92. doi: 10.1121/1.382142.
How three supersegmental variables (amplitude, pitch contour, and duration pattern) influence phrase boundary perception was investigated in two studies. Listeners located the phrase boundary in ambiguous algebraic expressions, such as "(A plus E) times O" and A plus (E times O)." In one experiment, two values of each of three variables (appropriate or neutral) were orthogonally varied, using linear predictive coding analysis-synthesis procedures. There was a total of eight manipulations for each expression. In the other, the three suprasegmental variables were exchanged between the two alternative meanings of an expression, yielding a total of eight manipulations for each expression. Results from the two studies were consistent in showing that listeners use all three cues, and just these three to parse such utterances. That is, it was possible to completely shift the meaning of an expression uttered with one meaning into its alternate meaning by exchanging all three variables. In both studies, the effects of duration pattern and pitch contour were additive in total proportion correct. Possible models of how listeners process pitch and duration information independently in making a parsing decision are discussed.
两项研究探讨了三个超音段变量（振幅、音高轮廓和时长模式）如何影响短语边界感知。听众在模糊的代数表达式中定位短语边界，例如“(A加E)乘以O”和“A加(E乘以O)”。在一项实验中，使用线性预测编码分析合成程序，对三个变量中的每个变量的两个值（合适的或中性的）进行正交变化。每个表达式共有八种操作。在另一项实验中，在表达式的两种替代含义之间交换三个超音段变量，每个表达式共有八种操作。两项研究的结果一致表明，听众使用所有这三个线索，并且仅使用这三个线索来解析此类话语。也就是说，通过交换所有三个变量，可以将以一种含义说出的表达式的含义完全转变为其替代含义。在两项研究中，时长模式和音高轮廓的影响在总正确比例中是相加的。讨论了听众在做出解析决策时如何独立处理音高和时长信息的可能模型。
