Viswanathan Navin, Dorsi Josh, George Stephanie
a Department of Psychology , State University of New York , New Paltz , NY , USA.
Q J Exp Psychol (Hove). 2014;67(3):581-9. doi: 10.1080/17470218.2013.821708. Epub 2013 Jul 24.
The irrelevant sound effect (ISE) is the finding that serial recall performance is impaired under complex auditory backgrounds such as speech as compared to white noise or silence. Several findings have demonstrated that ISE occurs with nonspeech backgrounds and that the changing-state complexity of the background stimuli is critical to ISE. In a pair of experiments, we investigate whether speech-like qualities of the irrelevant background have an effect beyond their changing-state complexity. We do so by using two kinds of transformations of speech with identical changing-state complexity: one kind that preserved speech-like information (sinewave speech and fully reversed sinewave speech) and others in which this information was distorted (two selectively reversed sinewave speech conditions). Our results indicate that even when changing-state complexity is held constant, sinewave speech conditions in which speech-like interformant relationships are disrupted, produce less ISE than those in which these relationships are preserved. This indicates that speech-like properties of the background are important beyond their changing-state complexity for ISE.
无关声音效应（ISE）是指与白噪声或安静环境相比，在诸如语音等复杂听觉背景下，系列回忆表现会受到损害的现象。多项研究结果表明，ISE在非语音背景下也会出现，且背景刺激的变化状态复杂性对ISE至关重要。在一组实验中，我们研究无关背景的类似语音特性是否除了其变化状态复杂性之外还具有其他影响。我们通过使用具有相同变化状态复杂性的两种语音变换来进行研究：一种保留了类似语音的信息（正弦波语音和完全反转的正弦波语音），另一种则使这些信息发生了扭曲（两种选择性反转的正弦波语音条件）。我们的结果表明，即使变化状态复杂性保持不变，类似语音的音间关系被破坏的正弦波语音条件所产生的ISE也比这些关系得以保留的条件要少。这表明，背景的类似语音特性对于ISE而言，除了其变化状态复杂性之外也很重要。
