Intervention for children with phonological impairment: Knowledge, practices and intervention intensity in the UK

Understanding capacity for implementing new interventions: A qualitative study of speech and language therapy services for children with speech sound disorder

BACKGROUND

Many speech sound disorder (SSD) interventions with a long-term evidence base are 'new' to clinical practice, and the role of services in supporting or constraining capacity for practice change is underexplored. Innovations from implementation science may offer solutions to this research-practice gap but have not previously been applied to SSD.

AIM

To explain variation in speech and language therapy service capacity to implement new SSD interventions.

METHODS & PROCEDURES

We conducted an intensive, case-based qualitative study with 42 speech and language therapists (SLTs) in three NHS services (n = 39) and private practice (n = 3) in Scotland. We explored therapists' diverse experiences of SSD practice change through individual interviews (n = 28) or self-generated paired (n = 2) or focus groups (n = 3). A theoretical framework (Normalization Process Theory) helped us understand how the service context contributed to the way therapists engaged with different practice changes.

OUTCOMES & RESULTS

We identified six types ('cases') of practice change, two of which involved the new SSD interventions. We focus on these two cases ('Transforming' and 'Venturing') and use Normalization Process Theory's Cognitive participation construct to explain implementation (or not) of new SSD interventions in routine practice. Therapists were becoming aware of the new interventions through knowledge brokers, professional networks and an intervention database. In the Transforming case, new SSD interventions for selected children were becoming part of local routine practice. Transforming was the result of a favourable service structure, a sustained and supported 'push' that made implementation of the new interventions a service priority, and considerable collective time to think about doing it. 'Venturing' happened where the new SSD interventions were not a service priority. It involved individual or informal groups of therapists trying out or using one or more of the new interventions with selected children within the constraints of their service context.

CONCLUSIONS & IMPLICATIONS

New, evidence-based SSD interventions may be challenging to implement in routine practice because they have in common a need for therapists who understand applied linguistics and can be flexible with service delivery. Appreciating what it really takes to do routine intervention differently is vital for managers and services who have to make decisions about priorities for implementation, along with realistic plans for resourcing and supporting it.

WHAT THIS PAPER ADDS

What is already known on the subject Many SSD interventions have an evidence base but are not widely adopted into routine clinical practice. Addressing this is not just about individual therapists or education/training, as workplace pressures and service delivery models make it difficult to change practice. What this paper adds to the existing knowledge This paper applies innovations from implementation science to help explain how what is going on in services can support or constrain capacity for implementing evidence-based SSD interventions. What are the potential or actual clinical implications of this work? Service managers and therapists will have a clearer idea of the time and support they may realistically have to invest for new SSD interventions to be used routinely.

'Sometimes I feel sad': A qualitative study on children's perceptions with cleft palate speech and language therapy

BACKGROUND

Evidence-based speech therapy involves the integration of (1) the scientific evidence for therapy with (2) the perspectives of clinicians concerning therapy and (3) the perspectives of patients about therapy. The cleft literature has already paid attention to the first two cornerstones of evidence-based speech therapy. Much less is known about how children perceive cleft speech therapy.

AIMS

The purpose of the current qualitative study was to investigate the perceptions, emotions and expectations of Flemish-speaking Dutch children with a cleft (lip and) palate (CP ± L), aged 5-12 years, with regard to the speech therapy they receive. In this study, a focus was made on speech therapy to eliminate compensatory cleft speech errors.

METHODS & PROCEDURES

Six children with a CP ± L, aged between 5 and 12 years, were included in this study. Child-friendly semi-structured interviews were conducted using a participatory, art-based qualitative approach. This means that the 'play and puppets technique' and 'draw-write and photo-elicitation technique' were used to guide the children through the interviews. Data derived from these interviews were analysed using an inductive thematic approach. Trustworthiness of the data was achieved by applying researcher triangulation, negative case analysis and an audit trail.

OUTCOMES & RESULTS

Analyses of the interviews revealed three major themes of importance to the children: (1) treatment values, (2) treatment practices and (3) treatment outcomes. Each theme was divided into different subthemes. The theme 'treatment values' consisted of the subthemes expectations and emotions around therapy and interference with daily living. Information flow, therapy content, confirmation and rewards, parents' attendance, therapy intensity, and homework were subthemes of the major theme 'treatment practices'. The theme 'treatment outcomes' was divided into two subthemes, namely speech improvement and peers' reactions.

CONCLUSIONS & IMPLICATIONS

Most children had positive attitudes towards speech therapy: it was 'something they liked' and 'something fun'. If children had negative attitudes they were related to having a fear of making mistakes during therapy. Children had clear expectations of the purpose of speech therapy. Speech therapy should 'help' improve their speech and make it more understandable to others. The children in this sample made some suggestions to decrease the experienced burden related to speech therapy. The results of this study will help to better tailor speech therapy programmes to the needs and experiences of children with a CP ± L.

WHAT THIS PAPER ADDS

What is already known on the subject Evidence-based speech therapy involves the integration of (1) the scientific evidence for therapy with (2) the perspectives of clinicians concerning therapy and (3) the perspectives of patients and their families about therapy. The cleft literature has already paid attention to the first two cornerstones of evidence-based speech therapy. Different studies investigated the perspectives of SLPs and parents with regard to cleft palate speech therapy. However, much less is known about the children's own experiences with and perceptions around this speech therapy. What this study adds to existing knowledge This study used a qualitative research design to investigate the perceptions, emotions and expectations of children with a cleft (lip and) palate, aged 5-12 years, with regard to the speech therapy they receive. Speech therapy needed to focus on the elimination of compensatory speech errors. This study provides knowledge on the speech therapy-related experiences of children with a cleft palate. What are the potential or actual clinical implications of this work? Children in this sample made some concrete suggestions to decrease the experienced burden related to cleft speech therapy, for example, integration of school work during therapy sessions and practising on the level of spontaneous speech. The results of this study help us to better tailor speech therapy programmes to the needs and experiences of children with a CP ± L.

Complexity and cross-linguistic transfer in intervention for Spanish–English bilingual children with speech sound disorder

With bilingual children, intervention for speech sound disorders must consider both of the child’s phonological systems, which are known to interact with each other in development. Further, cross-linguistic generalization following intervention for bilingual children with speech sound disorders (i.e. the impact of treatment in one language on the other) has been documented to varying degrees in some prior studies. However, none to date have documented the cross-linguistic impact of treatment with complex targets (e.g. consonant clusters) for bilingual children. Because complex phonological targets have been shown to induce system-wide generalization within a single language, the potential for bilingual children to generalize learning across languages could impact the efficiency of intervention in this population. This pilot intervention study examines the system-wide, cross-linguistic effects of treatment targeting consonant clusters in Spanish for two Spanish–English bilingual children with phonological disorder. Treatment was provided with 40-minute sessions in Spanish via teletherapy, three times per week for six weeks. Comprehensive phonological probes were administered in English and Spanish prior to intervention and across multiple baselines. Pre-intervention data were compared to data from probes administered during and after intervention to generate qualitative and quantitative measures of treatment outcomes and cross-linguistic generalization. Results indicate a medium effect size for system-wide generalization in Spanish (the language of treatment) and English (not targeted in treatment), for both participants (mean effect size in Spanish: 3.6; English 4.3). These findings have implications for across-language transfer and system-wide generalization in treatment for bilingual children. 

Applying evidence to practice by increasing intensity of intervention for children with severe speech sound disorder: a quality improvement project

Speech sound disorder (SSD) affects up to 25% of UK children and may impact on: effective communication; the development of relationships; school progression and overall well-being. The evidence base shows that intervention for children with SSD is more effective and efficient when provided intensively in relation to the number of target sounds elicited in sessions (dose) and number of sessions per week (frequency). Southern Health and Social Care (HSC) Trust's baseline intensity of speech and language therapy (SLT) intervention was similar to that often found in current practice across the UK,where ~30 target sounds were elicited (dose) in once weekly sessions (frequency) over a 6-week block, followed by a break from therapy. This quality improvement (QI) project aimed to increase intensity of intervention for children with severe SSD within Southern HSC Trust's community SLT service to improve outcomes for children and their parents. QI methods supported accurate identification of ten 4-5 year olds with severe SSD and increased the intensity of their intervention over a 12-week period by measuring a range of data and speech outcomes. Findings showed a sustainable increase of dose (number of targets elicited per session) to levels recommended in the research (≥70). However, it was difficult to sustain increased frequency of appointments (to twice weekly) because of contextual factors such as sickness, etc. Accommodating this, measuring days between appointments captured an overall increase in the number of appointments attended across time. Child speech outcomes improved for direct speech measures and parent ratings of intelligibility. The intensive model of intervention has been implemented for children identified with severe SSD across Southern HSC Trust's community service with ongoing audit and development, and findings have been disseminated.

Using the Experience Sampling Method to Examine the Details of Dosage in School-Based Speech Sound Therapy

PURPOSE

The purpose of this project was to collect practice-based evidence regarding dosage in speech sound therapy sessions in school-based settings. Dosage is the number of trials within a therapy session for any one particular child. School-based speech-language pathologists (SLPs) face a variety of obstacles to service delivery, often making the implementation of evidence-based practices difficult. To that end, we were interested in exploring how therapy parameters, such as group size and session frequency were associated with dosage.

METHOD

Using the experience sampling method, we queried school-based SLPs (n = 90) across the United States. SLPs participated via a phone application, which randomly alerted them to participate 3 times per day for 5 days. SLPs also completed a demographic questionnaire that included information regarding caseload size and job satisfaction.

RESULTS

We report results from 670 therapy sessions. Results revealed that the therapy parameter of group size was negatively related to dosage. The SLP parameter of caseload size was positively related to dosage, but this was a small association. The child parameter of comorbidity was negatively related to dosage.

CONCLUSIONS

Our results support that as group size increases, children receive smaller doses of speech sound practice. Similarly, children who have a reported comorbidity received smaller doses compared to children who have an isolated speech sound disorder. We discuss implications for school-based practitioners and researchers.

Minimal, Maximal, or Multiple: Which Contrastive Intervention Approach to Use With Children With Speech Sound Disorders?

PURPOSE

This tutorial contrasts a familiar and frequently used speech sound disorder (SSD) intervention approach, conventional minimal pair, with newer but less familiar and less frequently used variants that may be more effective: (a) maximal opposition and (b) multiple oppositions.

METHOD

This tutorial provides a general description of each contrastive approach, focusing on the evidence base and a small number of critical elements that define the approach and make it unique from all other approaches. Hypothetical cases are used to illustrate how the approaches can be tailored to child needs and speech-language pathologist (SLP) expertise. Supplemental materials enhance the reader's skill in using these approaches in their practice with a minimal initial investment.

RESULTS

The reader will be able to identify which children with SSD are appropriate for conventional minimal pair, maximal opposition, or multiple oppositions approaches and will be able to plan intervention (i.e., select target sounds and contrasting words or nonwords, develop intervention activities, write goals, and determine intervention intensity) for each of these approaches.

CONCLUSIONS

This tutorial highlights that using the conventional minimal pair approach should be restricted to children with a small number of errors (i.e., older children or children with mild SSD). There is an opportunity for SLPs to use newer, more efficacious approaches with younger children and children with more severe SSDs. The maximal opposition approach is well suited to children with multiple errors across multiple sound classes. The multiple oppositions approach specifically targets global phoneme collapses that impact intelligibility.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.19178783.

A survey of interventions used by speech-language pathologists for children with speech sound disorders in the Middle East

PURPOSE

While many examples of speech pathology intervention approaches for children with speech sound disorders (SSDs) exist in English and some other European languages, approaches with children in other languages are largely unknown. The aim was to determine current speech-language pathologists (SLPs) intervention practices with children with SSDs in the ME, and to then compare these with international practices.

METHODS

Data were collected by online questionnaire using Qualtrics. One hundred and eighty-nine SLPs completed the survey. Participants were required to be Arabic first language speaking SLPs practicing in the ME (e.g. Kuwait, Saudi Arabia, UAE, and Egypt), working with children with SSDs.

RESULTS

The respondents reported a frequent use of phonological awareness, traditional articulation therapy, auditory discrimination, minimal pairs, and whole language therapy approaches in the treatment of children with SSDs, like their counterparts in Australia, the USA, UK, and Portugal. Gaps between research recommendations for evidence-based practice and actual clinical practice are identified, and discussed.

CONCLUSIONS

Future research should investigate the efficacy of speech-therapy approaches to improve service delivery for Arabic-speaking children with SSDs in the ME.

Parents' perceptions on speech therapy delivery models in children with a cleft palate: A mixed methods study

PURPOSE

This study investigated parents' perceptions on two different speech therapy delivery models in children with a CP ± L, namely an innovative high intensity speech intervention (i.e. HISI: 10 1-h sessions divided over 2 weeks) and a low intensity speech intervention (i.e. LISI: 10 1-h sessions divided over 10 weeks).

METHOD

Twelve parents of 12 children who received HISI (n = 6) or LISI (n = 6) were contacted with the request to participate to this study to review their opinion on the received therapy. Participation included the completion of a questionnaire containing items related to satisfaction, speech progress, intervention intensity and frequency, transfer, and need for further speech therapy. Additionally, semi-structured interviews were carried out. The interviews were analyzed using an inductive thematic approach.

RESULTS

There were no significant differences between the two groups in satisfaction with the "general speech therapy, "duration of one speech therapy session", "total intervention duration" and "degree of improvement of speech intelligibility". Following HISI, parents perceived more improvement in terms of spontaneous speech and better resolution of the speech disorders. The interviews revealed 3 themes of importance to the parents: (1) treatment-related expectations, (2) treatment-related burden, and (3) patient-therapist relationship. Parents in the HISI group reported two concerns: (1) the lack of variation when receiving daily intervention, and (2) the emotional burden when the child is confronted with his/her speech disorder on a daily basis.

CONCLUSIONS

Parents were equally satisfied with the provided intervention. Parents in the HISI group perceived more speech progress following the intervention compared to parents in the LISI group. The intensive contact with the speech pathologist enhanced the patient-therapist relationship. To support a cultural shift away from low intensity therapy delivery models, it will be important to counsel and inform parents of the benefits of HISI and to counterbalance concerns.

Is High-Intensity Speech Intervention Better? A Comparison of High-Intensity Intervention Versus Low-Intensity Intervention in Children With a Cleft Palate

Purpose The purpose of this study was to compare the effect of speech intervention provided with a low intensity with speech intervention provided with a high intensity on the speech and health-related quality of life (HRQoL) in Dutch-speaking children with a cleft palate with or without a cleft lip (CP ± L) between 4 and 12 years. Method A longitudinal, prospective, randomized controlled trial with a multiple baseline design was used. Twelve children with a CP ± L (M _age = 8.0 years, SD = 1.54) were divided into two groups using block randomization stratified by age and gender: One group received low-intensity speech intervention (LISI; n = 6) and one group received high-intensity speech intervention (HISI; n = 6). Children in the LISI group received intervention with a session duration of 1 hr, a dose frequency of 1 session per week, and a total intervention duration of 10 weeks. Children in the HISI group received intervention with a session duration of 1 hr, a dose frequency of 5 sessions per week, and a total intervention duration of 2 weeks. The cumulative intervention intensity was kept constant. Both groups received identical therapy programs provided by the same experienced speech therapist. Perceptual speech assessments were performed on baseline and posttreatment data points. Changes in HRQoL were assessed using the Velopharyngeal Insufficiency Effects on Life Outcomes (VELO) questionnaire. Both groups were compared over time using (generalized) linear mixed models. Results No significant Time × Group interactions were observed for the percentage of correctly produced consonants at the word and sentence levels, indicating no differences in evolution over time among the two groups. The variables speech understandability, speech acceptability, and the total VELO scores significantly improved following HISI, but not following LISI. Conclusions Children in the HISI group made equal and, for some variables, even superior progress in only 2 weeks of therapy compared to children in the LISI group who received 10 weeks of therapy. HISI is a promising strategy to improve speech outcomes and HRQoL in a shorter time period.

Making the case for the collection of a minimal dataset for children with speech sound disorder

BACKGROUND

NHS case note data are a potential source of practice-based evidence which could be used to investigate the effectiveness of different interventions for individuals with a range of speech, language and communication needs. Consistency in pre- and post-intervention data as well as the collection of relevant variables would need to be demonstrated as a precursor to adopting this approach in future investigations of speech and language therapy intervention.

AIMS

To explore whether routine clinical data collection for children with speech sound disorder (SSD) could be a potential source for examining the effectiveness of intervention(s).

METHODS & PROCEDURES

We examined case notes from three UK NHS services, reviewing 174 sets of case notes and 234 blocks of therapy provided for school-age children with SSD.

MAIN CONTRIBUTION

We found there was significant variation in pre- and post-intervention data and variables collected by the services. The assessment data available in the case notes across all sites were insufficient to be used to compare the effectiveness of different interventions. Specific issues included lack of consistent reporting of pre- and post-intervention data, and use of a variety of both formal and informal assessment tools.

CONCLUSIONS & IMPLICATIONS

The case notes reviewed were from three sites and may not represent wider clinical practice, nevertheless the findings suggest the sample explored indicates the need for more consistent and contemporaneous collection of data for children with SSD to facilitate the investigation of different interventions in practice. Researchers should work with the clinical community to determine a minimal dataset that includes a core outcome set and potential variables. This should be feasible to collect in clinical practice and provide a dataset for future investigations of clinically relevant research questions. This would provide an invaluable resource to the clinical academic and research communities enabling research questions to be addressed that have the potential to lead to improved outcomes and more cost-effective services.

WHAT THIS PAPER ADDS

What is already known on the subject While there is some evidence for the efficacy of therapy for children with SSD, studies typically focus on very specific populations who meet strict selection criteria and take place in university clinics or laboratory-style settings which do not reflect typical clinical practice in the UK and elsewhere. An alternative approach to investigating the effectiveness of interventions would be to use NHS case note data. It is not clear from the existing literature whether case note data are sufficiently robust to facilitate such an analysis. What this paper adds to existing knowledge This study found that case note data, in particular assessment data, were highly variable across services and would be insufficient to compare different interventions for this population. Agreement on what should be included in a minimal dataset for children with SSD is required to maximize the potential for NHS clinical case notes to become a resource for future research. What are the actual or potential clinical implications of this work? This study indicates that current clinical practice in SLT for children with SSD is inconsistent with regards to the reporting of pre- and post-intervention assessment data and other important variables in case notes. We make the case for agreeing a minimal dataset with a need for clinicians to work with researchers to determine core outcomes and additional relevant data, which can be feasibly collected in clinical practice.

Achieving 'coherence' in routine practice: a qualitative case-based study to describe speech and language therapy interventions with implementation in mind

Background

Implementation depends on healthcare professionals being able to make sense of a new intervention in relation to their routine practice. Normalisation Process Theory refers to this as coherence work. However, specifying what it takes to achieve coherence is challenging because of variations in new interventions, routine practices and the relationship between them. Frameworks for intervention description may offer a way forward, as they provide broad descriptive categories for comparing complex interventions. To date such frameworks have not been informed by implementation theory, so do not account for the coherence work involved in holding aspects of routine practice constant while doing other aspects differently. Using speech and language therapy as an empirical exemplar, we explored therapists’ experiences of practice change and developed a framework to show how coherence of child speech interventions is achieved.

Methods

We conducted a retrospective case-based qualitative study of how interventions for child speech problems had changed across three NHS speech and language therapy services and private practice in Scotland. A coherence framework was derived through interplay between empirical work with 42 therapists (using in-depth interviews, or self-organised pairs or small focus groups) and Normalisation Process Theory’s construct of coherence.

Findings

Therapists reported a range of practice changes, which had demanded different types of coherence work. Non-traditional interventions had featured for many years in the profession’s research literature but not in clinical practice. Achieving coherence with these interventions was intellectually demanding because they challenged the traditional linguistic assumptions underpinning routine practice. Implementation was also logistically demanding, and therapists felt they had little agency to vary what was locally conventional for their service. In addition, achieving coherence took considerable relational work. Non-traditional interventions were often difficult to explain to children and parents, involved culturally uncomfortable repetitive drills and required therapists to do more tailoring of intervention for individual children.

Conclusions

The intervention coherence framework has practical and theoretical applications. It is designed to help therapists, services and researchers anticipate and address barriers to achieving coherence when implementing non-routine interventions. It also represents a worked example of using theory to make intervention description both user-focused and implementation-friendly.

Supplementary Information

The online version contains supplementary material available at 10.1186/s43058-021-00159-0.

A qualitative exploration of speech-language pathologists' intervention and intensity provision for children with phonological impairment

PURPOSE

The aim of this study was to explore the reasons behind speech-language pathologists' (SLPs') current clinical practices (intervention and intensity provision) for children (0-18 years) with phonological impairment.

METHOD

Three focus groups each with five SLPs and six 1:1 interviews with SLP managers from one region of the UK (n = 21) were carried out. A thematic analysis was undertaken.

RESULT

SLPs often used an eclectic mix of familiar approaches with easily-accessible therapy materials. SLPs only reported deviating from their core approach if the child did not progress in therapy. Mixed responses were gathered on the perceived feasibility of transferring evidence-based intervention intensities into clinical practice. The importance of parents to increase intensity provision at home was noted. Barriers to SLPs' evidence-based decision-making included: time; confidence levels; service-related restrictions and; difficulty replicating research in practice. Having peer support and access to decision-making pathways and manualised intervention protocols were considered ways to overcome these barriers.

CONCLUSION

There is a research-practice gap in which SLPs' current practices are driven by organisational factors, their own preferences and child-specific factors. To narrow this gap, SLPs suggested the development of time-saving, evidence-based tools.

An Exploratory Study of Speech and Language Therapy Intervention for Children Born With Cleft Palate ± Lip

INTRODUCTION

Children born with a cleft palate ± lip are at risk of developing speech and language difficulties, which may require intervention from a speech and language therapist (SLT). To date, there is no strong evidence to support one approach to intervention over another, neither is it clear which approaches or methods of provision are commonly used.

OBJECTIVES

To describe the range of speech and language therapy interventions being used with children born with cleft palate in the United Kingdom up to 5 years of age. To explore the different ways, interventions are being delivered.

DESIGN

A prospective study to conduct 9 semi-structured focus groups. Iterative content analysis was completed.

SETTING

Regional Cleft Lip and Palate Centers in the United Kingdom.

PARTICIPANTS

Sixty-two speech and language therapy professionals from specialist cleft teams and community services.

RESULTS

Four main codes were identified: "intervention approaches," "service delivery models," "decision-making and rationale," and "patient-centered care." Participants frequently discussed how they adopt an eclectic style when delivering intervention, the importance of an individualized approach for each child and service delivery constraints, such as a lack of resources.

CONCLUSION

Insight into the multitude of intervention approaches used by SLTs, aspects which influence their decision-making and the variability of service delivery models were gained. Uncertainty regarding which intervention approaches and methods for delivery are most effective provides rationale for future research, to improve the effectiveness of speech and language intervention for children with cleft palate ± lip.

Waiting for speech-language pathology services: A randomised controlled trial comparing therapy, advice and device

Purpose: To compare children's speech, language and early literacy outcomes, and caregivers' empowerment and satisfaction following provision of 12 sessions of direct intervention (therapy), or face-to-face advice or a purpose-built website (device) while waiting for therapy.Method: A four-stage randomised controlled trial was undertaken involving three- to six-year-old children referred to speech-language pathology waiting lists at two Australian community health centres over eight months (n = 222). Stage 1 (screening): 149 were eligible to participate. Stage 2 (pre-assessment): 117 were assessed. Stage 3 (intervention): 110 were randomised to advice (33), device (39) or therapy (38). Stage 4 (post-assessment): 101 were re-assessed by a speech-language pathologist blinded to the intervention condition.Result: After controlling for baseline levels, children's speech (percentage of consonants correct) was significantly higher in the therapy group compared to the advice and device conditions. Caregivers' satisfaction was also significantly higher in the therapy condition compared to the device condition. There were no significant differences between the three conditions for children's intelligibility, language and early literacy or caregivers' empowerment.Conclusion: Therapy resulted in significantly higher speech outcomes than the advice and device conditions and was associated with significantly greater caregiver satisfaction. Provision of a website containing evidence-based material or a single session of advice may be a viable alternative while children wait for therapy targeting intelligibility, language and early literacy, and to empower caregivers.

Evaluation of Parent- and Speech-Language Pathologist-Delivered Multiple Oppositions Intervention for Children With Phonological Impairment: A Multiple-Baseline Design Study

Purpose Evidence for the multiple oppositions intervention approach indicates it should be delivered 3 times weekly; however, this high dose frequency is not provided by many speech-language pathologists worldwide. This study investigated whether parents could be involved in delivering phonological intervention to fulfill this intensity shortfall. Method Five children with moderate-to-severe phonological impairment aged 3;3-5;11 (years;months) and 1 of their parents participated in this study using a multiple-baseline across participants design. Participants attended one 60-min clinic-based session per week for 8 weeks, and parents completed home practice 2 times per week over this period after receiving training. Parents also attended a 60-min training session prior to commencing intervention. Results All children showed a treatment effect to treated words. Three of the 5 children demonstrated a large effect size for generalization to nontreatment words, with 1 child demonstrating a moderate effect and 1 child demonstrating no effect. However, all children showed qualitative changes to their speech system. Three of the 5 children experienced significant changes to communicative participation. Measures of treatment fidelity indicated that parents were able to competently deliver the intervention both within the clinic and at home. Conclusions Combined parent- and speech-language pathologist-delivered multiple oppositions intervention is effective for some children with moderate-to-severe phonological impairment. The findings indicate that parents can be trained to competently and confidently deliver phonological intervention. Further evidence is needed to identify optimal child and parent characteristics most suited to this modified service delivery approach. Supplemental Material https://doi.org/10.23641/asha.10565885.

Systematic review of ultrasound visual biofeedback in intervention for speech sound disorders

BACKGROUND

As cost and access barriers to ultrasound technology have decreased, interest in using ultrasound visual biofeedback (U-VBF) as a tool for remediating speech sound disorders (SSD) has increased. A growing body of research has investigated U-VBF in intervention for developmental SSD; however, diversity in study design, participant characteristics, clinical methods and outcomes complicate the interpretation of this literature. Thus, there is a need for a synthesis and review of the evidence base for using U-VBF in intervention for SSD.

AIMS

To synthesise and evaluate the research evidence for U-VBF in intervention for developmental SSD.

METHODS

A systematic review was conducted. Eight electronic databases were searched for peer-reviewed articles published before 2018. Details about study design, participants, intervention procedures, service delivery, intervention intensity and outcomes were extracted from each study that met the inclusion criteria. The included studies were rated using both a critical appraisal tool and for their reporting of intervention detail.

MAIN CONTRIBUTIONS

Twenty-eight papers, comprising 29 studies, met the inclusion criteria. The most common research design was single-case experimental design (44.8% of studies). The studies included between one and 13 participants (mean = 4.1) who had a mean age of approximately 11 years (range = 4;0-27 years). Within the research evidence, U-VBF intervention was typically provided as part of, or as an adjunct to, other articulatory-based therapy approaches. A range of lingual sounds were targeted in intervention, with 80.6% of participants across all reviewed studies receiving intervention targeting rhotics. Outcomes following therapy were generally positive with the majority of studies reporting that U-VBF facilitated acquisition of targets, with effect sizes ranging from no effect to a large effect. Difficulties with generalisation were observed for some participants. Most studies (79.3%) were categorised as efficacy rather than effectiveness studies and represented lower levels of evidence. Overall, the reviewed studies scored more highly on measures of external validity than internal validity.

CONCLUSIONS

The evidence base for U-VBF is developing; however, most studies used small sample sizes and lower strength designs. Current evidence indicates that U-VBF may be an effective adjunct to intervention for some individuals whose speech errors persist despite previous intervention. The results of this systematic review underscore the need for more high-quality and large-scale research exploring the use of this intervention in both controlled and community contexts.