语音发展是一个复杂过程，受到一系列因素如普遍性、口腔运动肌发育和外部语言环境的影响。书稿采用了转写分析法和声学分析法，设计的三个实验，选取了几十名3到5岁汉语儿童作为实验对象，及十几名成人作为参照组，对汉语儿童清阻塞音语音产出的情况进行了对比分析、相关性分析，研究其习得顺序及语音发展的连续性问题。书稿提出一个组合模型来解释习得顺序，并得出了儿童语音发展是连续性而非离散这一结论，验证了语音发展的连续性假设。

马俊周，男，生于1986年，湖南大学外国语言学及应用语言学专业博士毕业。现就职于台州学院，讲师，主要从事英语教学工作。研究方向为语言习得、实验语音学，主持教育部人文社会科学项目一项，在SCI/SSCI/CSSCI来源期刊发表相关论文四篇。

Chapter 1 Introduction
1.1 Research background
1.2 Purpose of the study
1.3 Significance of the study
1.4 Research questions and hypotheses
Chapter 2 Literature review
2.1 Articulation and acoustics of obstruents
2.1.1 Articulation of obstruents
2.1.2 Acoustics of obstruents
2.2 Theoretical frameworks
2.2.1 Theories on the phonological acquisition order
2.2.2 Theories on discontinuity and continuity
2.3 Previous studies
2.3.1 Studies related to the phonological acquisition order
2.3.2 Studies related to continuity and discontinuity of speech
development
2.4 Summary
Chapter 3 Experiment one：Stops
3.1 Methodology
3.1.1 Participants
3.1.2 Materials
3.1.3 Procedures
3.1.4 Transcription analysis
3.1.5 Acoustic analysis
3.1.6 Statistical analysis
3.2 Results
3.2.1 Acoustic properties of stops
3.2.2 Acquisition order suggested by transcription analysis
3.2.3 Acquisition order and issue of continuity suggested by
acoustic analysis
3.3 Discussion
3.3.1 Acoustic properties of stops
3.3.2 Acquisition order of stops
3.3.3 Issue of continuity
3.4 Summary
Chapter 4 Experiment two：Fricatives
4.1 Methodology
4.1.1 Participants
4.1.2 Materials
4.1.3 Procedures
4.1.4 Transcription analysis
4.1.5 Acoustic analysis
4.1.6 Statistical analysis
4.2 Results
4.2.1 Acoustic properties of fricatives
4.2.2 Acquisition order suggested by transcription analysis
4.2.3 Acquisition order and issue of continuity suggested by
acoustic analysis
4.3 Discussion
4.3.1 Acoustic properties of fricatives
4.3.2 Acquisition order of fricatives
4.3.3 Issue of continuity
4.4 Summary
Chapter 5 Experiment three：Affricates
5.1 Methodology
5.1.1 Participants
5.1.2 Materials
5.1.3 Procedures
5.1.4 Transcription analysis
5.1.5 Acoustic analysis
5.1.6 Statistical analysis
5.2 Results
5.2.1 Acoustic properties of affricates
5.2.2 Acquisition order suggested by transcription analysis
5.2.3 Acquisition order and issue of continuity suggested by
acoustic analysis
5.3 Discussion
5.3.1 Acoustic properties of affricates
5.3.2 Acquisition order of affricates
5.3.3 Issue of continuity
5.4 Summary
Chapter 6 General discussion
6.1 Acoustic properties of obstruents
6.2 Acquisition order of obstruents
6.3 Issue of continuity
Chapter 7 Conclusion
7.1 Major findings
7.2 Limitations
7.3 Directions for future research
References
Acknowledgments