The feature [+spread glottis] ([+s.g.]) denotes that a speech sound is produced with a wide glottal aperture with audible voiceless airflow. Icelandic is unusual in the degree to which [+spread glottis] is involved in the phonology: in /h/, pre-aspirated and post-aspirated stops, voiceless fricatives and voiceless sonorants. The ubiquitousness of the feature could potentially affect the rate and process of its acquisition. This paper investigates the development of [+s.g.] in Icelandic, both in general and in a range of contexts, in a cross-sectional study of 433 typically developing Icelandic-speaking children aged two to seven years. As a feature, [+s.g.] is acquired early in Icelandic, although specific sound classes lag behind due to other output constraints. Children reach mastery of [+s.g.] by age three except in word-initial post-aspirated stops and voiceless nasals. Findings are interpreted in light of the literature on the feature and its development.

特征[+扩展声门] ([+sg]) 表示语音是通过宽声门孔径和可听见的清音气流产生的。冰岛语的不同寻常之处在于[+声门张开]参与音系的程度：在/h/、前送气和后送气塞音、清摩擦音和清响音中。该功能的普遍存在可能会影响其获取的速度和过程。本文对 433 名 2 至 7 岁的冰岛语儿童进行横断面研究，调查了冰岛语中 [+sg] 的发展情况，包括一般情况和各种背景。作为一项功能，[+sg] 在冰岛语中很早就获得了，尽管由于其他输出限制，特定的声音类别滞后。儿童在三岁时就可以掌握 [+sg]，但词首后送气塞音和清鼻音除外。研究结果是根据有关该功能及其发展的文献来解释的。