Abstract:

The development of reading ability is crucial for children's academic achievement and social adaptation. Among various cognitive skills influencing reading development, phonological awareness is widely recognized as a core factor. In Chinese, lexical tone awareness constitutes a key component of phonological awareness. Recent research has increasingly emphasized the independent assessment of Chinese lexical tone awareness and its specific relationship with children’s reading development. This paper systematically reviews these studies and highlights important findings and future research directions.

Chinese lexical tone awareness is defined as the ability to perceive and manipulate tonal units in Chinese. Given that Chinese lexical tones exhibit categorical properties and play a fundamental role in distinguishing word meanings, tone perception can be subdivided into discrimination and categorization components. Tone discrimination tasks involve detecting differences between tones, whereas tone categorization tasks require judging the categorical identity of tonal stimuli. Besides, tone manipulation tasks involve tone production, tone substitution, and tone realization during pinyin or word reading. These components exhibit distinct developmental trajectories: tone discrimination matures during infancy, tone categorization develops markedly in the preschool years, and tone manipulation achieves adult-like proficiency only during later school years.

This review discusses the associative, predictive, and causal evidence linking each component of Chinese lexical tone awareness to reading development. Cross-sectional studies show that school-aged children with Chinese reading difficulties exhibit deficits in tone discrimination, and that discrimination ability is significantly associated with word reading performance across grades. Longitudinal studies further reveal that preschoolers’ tone discrimination skills predict later Chinese reading outcomes. Intervention studies provide preliminary evidence for a causal link between tone discrimination and word reading, though these effects appear developmentally constrained. Notably, Chinese lexical tone discrimination predicts reading performance in both Chinese and English, even after controlling for confounding variables, suggesting a broader role in second-language reading development. For tone categorization, cross-sectional studies indicate that children with Chinese reading disabilities display delayed development, with categorization abilities significantly correlating with word reading skills. Further analyses reveal that tone categorization independently contributes to Chinese reading proficiency and may serve as a key predictor of reading disabilities. Longitudinal research suggests that preschoolers’ tone categorization skills predict early reading outcomes in primary school, though predictive effects may be less stable among children at risk for reading disabilities. Moreover, tone categorization skills are found to predict English word reading and reading comprehension after accounting for confounders. Regarding tone manipulation, cross-sectional studies show that children with reading disabilities perform significantly worse than their typically developing peers. Tone manipulation skills are significantly associated with both Chinese and English reading abilities.

Synthesizing current evidence, several novel issues and future directions are highlighted. First, most studies combine different components of Chinese lexical tone awareness into a single index, limiting understanding of their distinct contributions. Future research should separately assess tone discrimination, tone categorization, and tone manipulation to elucidate their specific roles in identifying Chinese and English reading difficulties and predicting developmental trajectories. Second, while numerous cross-sectional studies suggest that tone awareness is a reliable marker for reading difficulties and is closely related to reading development in typically developing children, longitudinal studies reveal that predictive effects are more stable among typical readers than among children with reading difficulties. Future longitudinal research focusing on at-risk populations is needed. Third, although Chinese lexical tone awareness has been linked to reading abilities in both Chinese and English, few studies have directly compared its relative contributions across languages. Future studies should address the cross-linguistic implications of tone awareness for identifying reading difficulties. Furthermore, most existing studies focus on school-aged children, with relatively few examining preschoolers’ tone awareness in relation to English reading development. Given the potential existence of critical periods for tone-based reading interventions, long-term longitudinal research is needed to determine optimal intervention windows across developmental stages. Additionally, much of the current research emphasizes Cantonese rather than Mandarin tone awareness, despite dialectal differences potentially influencing tone perception and reading development. Future studies should broaden the evidence base for Mandarin Chinese or other Chinese dialects. Finally, although preliminary intervention studies suggest a causal relationship between tone awareness and reading development, current evidence is limited by small sample sizes, short follow-up periods, and insufficient control of confounding factors. Future large-scale, rigorously controlled, and long-term intervention studies are necessary to verify the causal role of enhancing Chinese lexical tone awareness in reading development and to refine intervention strategies based on developmental timing.

By systematically reviewing the distinct roles of tone discrimination, categorization, and manipulation and incorporating cross-linguistic and developmental perspectives, this paper advances understanding of Chinese lexical tone awareness as a multifaceted predictor of reading ability and outlines critical pathways for future research.

Key words: Chinese lexical tone awareness, reading ability, children, association, prediction