Helmer Strik

Helmer Strik
Radboud University | RU · Centre for Language Studies

Ph.D.

About

325
Publications
66,074
Reads
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5,187
Citations
Introduction
Helmer (Wilhelmus) Strik Associate Professor, Dept. of Linguistics, Centre for Language and Speech Technology (CLST), Radboud University Nijmegen hstrik.ruhosting.nl www.linkedin.com/pub/helmer-strik/9/438/851 twitter @HelmeStri
Additional affiliations
December 1989 - December 2005
Radboud University
Position
  • Researcher - teacher
January 1989 - present
Radboud University
Position
  • researcher & teacher
Education
November 1994
Radboud University
Field of study
  • Physics
December 1985
Radboud University
Field of study
  • Physics

Publications

Publications (325)
Conference Paper
Full-text available
The last few years have witnessed an increasing demand for Automatic Speech Recognition (ASR) technology that can be successfully implemented in educational applications supporting the development of language skills. The main reason for this is the need for digital applications that can support the development of speaking and reading skills in the...
Conference Paper
Full-text available
Alzheimer's Disease (AD) is the world's leading neurodegenerative disease, which often results in communication difficulties. Analysing speech can serve as a diagnostic tool for identifying the condition. The recent ADReSS challenge provided a dataset for AD classification and highlighted the utility of manual transcriptions. In this study, we used...
Conference Paper
Full-text available
Automatic assessment of reading fluency using automatic speech recognition (ASR) holds great potential for early detection of reading difficulties and subsequent timely intervention. Precise assessment tools are required, especially for languages other than English. In this study, we evaluate six state-of-the-art ASR-based systems for automatically...
Conference Paper
Full-text available
With recent advancements in automatic speech recognition (ASR), ASR-based educational applications have become increasingly viable. This paper presents a preliminary investigation into whether peer evaluations of the speech produced during the use of these applications, by primary school-aged children, is reliable and valid. Twenty-one Dutch primar...
Conference Paper
Full-text available
Voicebots have provided a new avenue for supporting the development of language skills, particularly within the context of second language learning. Voicebots, though, have largely been geared towards native adult speakers. We sought to assess the performance of two state-of-the-art ASR systems, Wav2Vec2.0 and Whisper AI, with a view to developing...
Conference Paper
Full-text available
Speech intelligibility (SI) is essential in communication and second language learning. In this study, non-native SI was measured through Visual Analogue Scale (VAS) scores and Orthographic Transcriptions (OTs) of read aloud sentences. Seven measures automatically derived from the OTs at word and subword levels were studied. The reliability of the...
Conference Paper
Full-text available
Current applications of Automatic Speech Recognition (ASR) based technology for second language learning often require comparisons of native and non-native speech for evaluation and feedback purposes, which are generally based on limited sets of features that might not be the most optimal ones to characterize native as opposed to non-native speech....
Conference Paper
Full-text available
Speech intelligibility (SI) plays an important role in second language learning. It can be influenced by many factors and various approaches have been explored to measure it. In this study, the intelligibility of Dutch non-native speech was measured by Visual Analogue Scale (VAS) and word accuracy (!"") that was automatically derived from orthograp...
Preprint
Full-text available
Voicebots have provided a new avenue for supporting the development of language skills, particularly within the context of second language learning. Voicebots, though, have largely been geared towards native adult speakers. We sought to assess the performance of two state-of-the-art ASR systems, Wav2Vec2.0 and Whisper AI, with a view to developing...
Preprint
Full-text available
The interest in employing automatic speech recognition (ASR) in applications for reading practice has been growing in recent years. In a previous study, we presented an ASR-based Dutch reading tutor application that was developed to provide instantaneous feedback to first-graders learning to read. We saw that ASR has potential at this stage of the...
Preprint
Full-text available
Automatic assessment of reading fluency using automatic speech recognition (ASR) holds great potential for early detection of reading difficulties and subsequent timely intervention. Precise assessment tools are required, especially for languages other than English. In this study, we evaluate six state-of-the-art ASR-based systems for automatically...
Preprint
Full-text available
Alzheimer's Disease (AD) is the world's leading neurodegenerative disease, which often results in communication difficulties. Analysing speech can serve as a diagnostic tool for identifying the condition. The recent ADReSS challenge provided a dataset for AD classification and highlighted the utility of manual transcriptions. In this study, we used...
Article
Full-text available
Introduction: Speech intelligibility is an important indicator of the degree of speech impairment in pathological speech. Articulation, as a key feature of dysarthria, has been found to be a stronger contributor to intelligibility of dysarthric speech compared to voice quality, nasality, and prosody. In fact, therapy addressing articulation is oft...
Article
The shortage of large-scale learners’ speech corpora and precise manual annotations are two major challenges for automatic L2 speech recognition and error detection in L2 speech, especially for non-dominant varieties of pluricentric languages. In these cases, collecting and annotating large non-native (L2 learner) corpora for all language varieties...
Conference Paper
Full-text available
Learning to read is a vital skill to function in society. Unfortunately, an increasing part of Dutch adolescents have such poor reading skills that they risk becoming functionally illiterate as adults (Gubbels et al., 2019). As such, the issue of improving reading education should be addressed as early in children’s lives as possible. Personalised...
Article
Full-text available
Speaking skills generally receive little attention in traditional English as a Foreign Language (EFL) classrooms, and this is especially the case in secondary education in Indonesia. A vocabulary deficit and poor pronunciation skills hinder learners in their efforts to improve speaking proficiency. In the present study, we investigated the effects...
Article
Full-text available
Background: The increasing need for speech therapy due to our ageing population raises the demand on therapeutical resources. To meet this demand, innovative delivery of speech training is required. eHealth applications may provide a solution, as intensified and prolonged training is only possible and affordable in patients' home environment. Aim...
Article
Full-text available
Learning to spell in Dutch is a difficult task that children cannot learn autonomously. Essential for developing good spelling skills is direct instruction of the spelling principles, enough practice, and feedback. With respect to direct instruction, a qualitative overview of which spelling errors are made by which type of children at which point i...
Article
Full-text available
Speech intelligibility is an essential though complex construct in speech pathology. In this paper, we investigated the interrater reliability and validity of two types of intelligibility measures: a rating-based measure, through Visual Analogue Scales (VAS), and a transcription-based measure called Accuracy of Words (AcW), through two forms of ort...
Conference Paper
Reading is a learned skill that children acquire through instruction and practice. A desirable feature of that practice is that children can read aloud under the guidance of a teacher. Unfortunately, this is not always possible to a sufficient extent because of general time-constraints in teacher-fronted education. For this reason, experts have bee...
Chapter
Speech can reveal important characteristics of a person such as accent, gender, age, and health. Identifying specific pathologies in a person’s speech can be extremely useful for diagnosis, especially if this can be done automatically. In the present research, we investigate which automatically computed speech features are characteristic for distin...
Chapter
The interest in employing automatic speech recognition (ASR) in applications for reading practice has been growing in recent years. In a previous study, we presented an ASR-based Dutch reading tutor application that was developed to provide instantaneous feedback to first-graders learning to read. We saw that ASR has potential at this stage of the...
Article
Full-text available
Idiom processing studies have paid considerable attention to the relationship between idiomatic expressions as a whole and their constituent words. Although most research focused on the semantic properties of the constituent words, their orthographic form could also play a role in processing. To test this, we assessed both form and meaning activati...
Conference Paper
Full-text available
We investigated speech intelligibility in dysarthric and non-dysarthric speakers as measured by two commonly used metrics, ratings through the Visual Analogue Scale (VAS) and word accuracy (AcW) through orthographic transcriptions. To gain a better understanding of how acoustic-phonetic correlates could be employed to obtain more objective measures...
Article
Respiration is an essential and primary mechanism for speech production. We first inhale and then produce speech while exhaling. When we run out of breath, we stop speaking and inhale. Though this process is involuntary, speech production involves a systematic outflow of air during exhalation characterized by linguistic content and prosodic factors...
Article
A vocabulary deficit negatively affects students’ language performance. Emotions such as speaking anxiety and language enjoyment in the English as a Foreign Language (EFL) classroom can affect students’ achievements as well. We investigated the effects of two Automatic Speech Recognition (ASR)-based websites, I Love Indonesia (ILI) and NovoLearning...
Conference Paper
Full-text available
Speech production is a complex human activity that may be affected by both physical and cognitive disorders. Since deviations in speech production can potentially reveal diseases apparently unrelated to speech, speech-based early detection is currently a topical issue. In the present research, we study whether changes in speech can indicate an upco...
Conference Paper
Full-text available
Speech intelligibility is an essential though complex construct in speech pathology. It is affected by multiple contextual variables and it is often measured in different ways. In this paper, we evaluate various measures of speech intelligibility based on orthographic transcriptions, with respect to their reliability and validity. For this study, d...
Conference Paper
Full-text available
In the light of the current COVID-19 pandemic, the need for remote digital health assessment tools is greater than ever. This statement is especially pertinent for elderly and vulnerable populations. In this regard, the INTERSPEECH 2020 Alzheimer’s Dementia Recognition through Spontaneous Speech (ADReSS) Challenge offers competitors the opportunity...
Conference Paper
Full-text available
Learning to read is a prerequisite to participate in our knowledge society. Developing reading skills requires intensive practice with individual evaluation and guidance by teachers, which is not always feasible in traditional classroom instruction. Automatic Speech Recognition (ASR) technology could offer a solution, but so far it has been mostly...
Article
Full-text available
The present study investigated intuitions of L2 learners about important properties of L2 idiomatic expressions to gain insights for research on L2 idiom processing and acquisition. More specifically, we examined (a) how reliable L2 learners’ intuitions are, (b) how much they differ from native speakers’ intuitions, and (c) whether they are better...
Article
Foreign Language Speaking Anxiety (FLSA) is known to negatively affect the performance of foreign language learners. Among the four language skills, speaking is the most anxiety-provoking skill. We investigated the presence of FLSA in Indonesian vocational high school students and we tested whether web-based language learning might help to reduce s...
Conference Paper
Full-text available
LARA (Learning and Reading Assistant) is an open source platform whose purpose is to support easy conversion of plain texts into multimodal online versions suitable for use by language learners. This involves semi-automatically tagging the text, adding other annotations and recording audio. The platform is suitable for creating texts in multiple la...
Conference Paper
Full-text available
Multiword expressions such as idioms (beat about the bush), collocations (plastic surgery) and lexical bundles (in the middle of) are challenging for disciplines like Natural Language Processing (NLP), psycholinguistics and second language acquisition, due to their more or less fixed character. Idiomatic expressions are especially problematic, beca...
Article
Full-text available
Idiomatic expressions like hit the road or turn the tables are known to be problematic for L2 learners, but research indicates that learning L2 idiomatic language is important. Relatively few studies, most of them focusing on English idioms, have investigated how L2 idioms are actually acquired and how this process is affected by important idiom pr...
Article
Dysarthria is a motor speech impairment, often characterized by slow and slurred speech that is generally incomprehensible by human listeners. An understanding of the intelligibility level of the patient's dysarthric speech can provide an insight into the progression/status of the underlying cause and is essential for planning therapy. Automatic as...
Presentation
This is the slide for the presentation of the conference paper 'Acoustic correlates of speech intelligibility: the usability of the eGeMAPS feature set for atypical speech'
Article
Full-text available
The processing of idiomatic expressions is a topical issue in empirical research. Various factors have been found to influence idiom processing, such as idiom familiarity and idiom transparency. Information on these variables is usually obtained through norming studies. Studies investigating the effect of various properties on idiom processing have...
Article
This paper reports on the role of technology in state-of-the-art pronunciation research and instruction, and makes concrete suggestions for future developments. The point of departure for this contribution is that the goal of second language (L2) pronunciation research and teaching should be enhanced comprehensibility and intelligibility as opposed...
Article
Full-text available
Although most second language learning studies involve high-educated participants, addressing low-educated participants seems important as research suggests that education background impacts second language (L2) learning efficiency. A controversial point in the L2 learning literature is the role of corrective feedback (CF). Research on CF in relati...
Chapter
This chapter examines the use of Automatic Speech Recognition (ASR) technology in the context of Computer Assisted Language Learning (CALL) and language learning and teaching research. A brief introduction to ASR is first provided, to make it clear why and how this technology can be used to the benefit of learning and development in second language...
Article
Full-text available
This paper reports on the role of technology in state-of-the-art pronunciation research and instruction, and makes concrete suggestions for future developments. The point of departure for this contribution is that the goal of second language (L2) pronunciation research and teaching should be enhanced comprehensibility and intelligibility as opposed...
Article
Full-text available
The majority of patients with neurological impairment like Parkinson's Disease (PD) or stroke are affected by dysarthria. Dysarthria is a motor speech impairment which negatively affects speech dimensions such as articulation and loudness. This leads to reduced intelligibility, often hindering daily life communication. Intensive and prolonged speec...
Article
This article provides an overview and evaluation of the uses—actual and potential—of automatic speech recognition (ASR) and spoken dialogue systems (SDS), related technologies that can be applied to second language speaking assessment, given particular definitions of the construct. Both technologies have only gradually moved in the direction of sup...
Experiment Findings
In the context of the research programme ‘Idiomatic Second Language Acquisition’ (for more information see http://isla.ruhosting.nl), we collected normative data of 374 Dutch idiomatic expressions by 390 native speakers. In an online test, we asked participants to judge various dimensions of idiomatic expressions on a five-point scale: Frequency, U...
Chapter
This chapter examines the use of Automatic Speech Recognition (ASR) technology in the context of Computer Assisted Language Learning (CALL) and language learning and teaching research. A brief introduction to ASR is first provided, to make it clear why and how this technology can be used to the benefit of learning and development in second language...
Article
Although corrective feedback (CF) has received much interest in the second language acquisition literature, relatively little research has investigated the relationship between CF and learner affect in concrete practice situations. The present study investigates learners’ affective states and practice behaviour in a novel context: oral grammar prac...