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Open research questions in Phonetics and Phonology Research

1,115 unresolved questions extracted from the limitations and future-work sections of 5,290 Phonetics and Phonology Research papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • exploring the use of more fine-grained meaning distinctions than word labels, - investigating the role of meaning in shaping the realization of tonal contours in Mandarin

    Word-specific tonal realizations in Mandarin · 2026 · DOI

  • The study identifies a gap in the understanding of how words' meanings influence their tonal realization. Prior work has focused on the role of lexical tones and articulatory constraints, but has neglected the role of meaning. The study aims to fill this gap by investigating the relation between words' pitch contours and their meanings.

    Word-specific tonal realizations in Mandarin · 2026 · DOI

  • The paper does not explicitly state a research gap, but it presents the Phonomaton as a tool to fill the need for a public web-facing facility for teaching and developing phonological analyses. It implies that existing tools or methods may not be sufficient for modeling and comparing complex derivations.

    Phonology as coding: An online tool for teaching and developing analyses · 2026 · DOI

  • The paper identifies a gap in the understanding of long-distance phenomena that do not appear to conform to expected locality patterns. The study notes that prior work has shown that harmony generally displays a highly local profile, but the phenomenon of discontinuous harmony appears to violate locality.

    Discontinuous vowel harmony in Guébie: Cyclic interleaving of syntax and phonology · 2026 · DOI

  • Investigate the effects of informational masking on speech perception in older adults or individuals with hearing impairment, - Examine the role of semantic constraints in speech perception in more naturalistic environments, - Explore the neural mechanisms underlying the interaction between semantic and syntactic processing

    Informational masking modulates semantic processing during recognition of syntactically complex speech: evidence from pupillometry · 2026 · DOI

  • There is a lack of understanding of how informational masking influences the use of semantic cues during spoken sentence processing. Previous studies have focused on the effects of semantic animacy constraints on recognition of syntactically complex sentences, but have not examined the effects of informational masking.

    Informational masking modulates semantic processing during recognition of syntactically complex speech: evidence from pupillometry · 2026 · DOI

  • While Guébie and Wolof are the only two languages we are currently aware of that show clear cases of discontinuous harmony, we expect that many other such cases exist and simply have not been described as such.

    Discontinuous vowel harmony in Guébie: Cyclic interleaving of syntax and phonology · 2026 · DOI

  • Findings from various experimental studies yielded mixed results, leading to debates over whether substantive biases exist.

    A substantive inductive bias for *NonFinalR in an artificial grammar learning replication experiment · 2026 · DOI

  • Additionally, while ND is facilitatory for English word learning, ND effects on Spanish word learning remain unclear.

    Phonological neighbourhood density effects on Spanish spoken word recognition and word learning · 2025 · DOI

  • Background: There is an increasing interest in cross-linguistic influences of the second language (L2) on the first (L1), but its communicative impact remains to be elucidated.

    More foreign-accented but more comprehensible: Attrition and amelioration of L1 speech in proficient L2 learners · 2024 · DOI

  • Coproduction on coarticula- an alternative and tion, based partly on earlier empirical and Chis- theoretical work of Kozhevnikov (1966, 1967), and (1965), Ohman, tovich to Fowler, conso- Perkell(l969). rather nants and vowels are copvoduced implies than assimilated. that are, temporally the most part, separate and context- for independent again our events. Consider earlier example of /su/. Fowler would reject to the usual assimilatory account according feature of the vowel which the lip-rounding instead, spreads she lip-rounding would argue to the /u/ seg- gesture belongs exclusively in ment and that the vowel simply overlaps Is/ segment: the entire gestures to the that the fricative time with approximation, segments are viewed as distinct, onal, and noninterfering gesture. To a first and vowel orthog- the consonant events. relatively produced consonants constrictions

    Vowels as islands of reliability · 1987 · DOI

  • Whether this conclusion is equally true of children learning natural lan- guages is an open question.

    Structural packaging in the input to language learning: Contributions of prosodic and morphological marking of phrases to the acquisition of language · 1987 · DOI

  • to this task. The rules take testing and itself is that whenever should accommodation to devote thorough

    The case against accommodation: Evidence from German speech error data · 1987 · DOI

  • Pronunciation instruction remains a persistent challenge in higher education contexts. There is a need for effective tools and methods for pronunciation development in EFL classrooms.

    Harnessing AI for Pronunciation Development: Investigating the Impact of Elsa Speak on EFL Learners’ Oral Proficiency · 2026 · DOI

  • There is a lack of research on the effects of morphology on the perception and written production of Estonian spontaneous speech. Previous studies on Estonian morphological processing have focused on the comprehension and production of single written inflected forms.

    Morphological effects in Estonian spontaneous speech: evidence from an online typing study · 2026 · DOI

  • The study is a pilot examination and cannot attempt to solve all the challenges discussed. The study has a limited dataset, with only two languages and a small number of participants.

    Joint attention, interaction-management, and other factors · 2026 · DOI

  • Future research should investigate the phenomenon in more languages and datasets. Future research should explore the relationship between attention alignment and information processing abilities. Future research should examine the implications of the study's findings for language teaching and learning.

    Joint attention, interaction-management, and other factors · 2026 · DOI

  • The study only examined Spanish. The sample size was limited to 77 native Spanish-speaking participants.

    Phonotactic structure modulates the role of consonants and vowels in lexical processing: evidence from Spanish · 2026 · DOI

  • Learners of English as a foreign language experience difficulties when producing vocabulary items in sentences or continuous conversation, - The lack of understanding of the phonetic characteristics of vowel-to-vowel linking in spoken English

    Exploring Vowel to Vowel Linking Patterns in Spoken English: A Phonetic Perspective · 2026 · DOI

  • The gap in the current research is the lack of understanding of the phonetic characteristics of vowel-to-vowel linking in spoken English, - The study aims to fill this gap by analyzing the realization of vowel-to-vowel linking in natural conversation

    Exploring Vowel to Vowel Linking Patterns in Spoken English: A Phonetic Perspective · 2026 · DOI

  • Further studies could investigate the effectiveness of targeted professional development programmes for rural secondary school teachers. Research could explore the impact of integrating explicit pronunciation pedagogy into teacher education programmes on learners' spoken English proficiency.

    Exploring Rural-based Secondary School Teachers’ Professional Development Needs in Teaching English Pronunciation in Vhembe District, South Africa · 2026 · DOI

  • The lack of formal training in pronunciation pedagogy for rural secondary school teachers. The marginalisation of pronunciation instruction in both pre-service teacher education and classroom practice.

    Exploring Rural-based Secondary School Teachers’ Professional Development Needs in Teaching English Pronunciation in Vhembe District, South Africa · 2026 · DOI

  • The interaction between speech perception and production has been studied in unnatural listening paradigms. It remains unknown whether naturalistic listening involves similar processes.

    Neural encoding of articulatory features during naturalistic speech perception · 2026 · DOI

  • The effects of accent variability on L2 lexical tone learning remain unexplored. The study aims to fill this gap by investigating whether accent variability enhances the talker variability benefit in learning words that differ only in lexical tones. The researchers identify a need to explore the generalization of the trained words to new talkers with a familiar and an unfamiliar accent.

    Effects of high accent variability on monolingual English perceivers’ acquisition of Mandarin minimal-tone-contrast words · 2026 · DOI

  • The paper identifies a gap in the understanding of tone spreading in African languages. The study highlights the need for further research on the geographic distribution of leftward tone spreading.

    Tone anticipation in Gbanu (Gbaya) · 2026 · DOI

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1,115 open questions have been extracted from the limitations and future-work passages of 5,290 Phonetics and Phonology Research papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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