The 'Better Conversations with Primary Progressive Aphasia (BCPPA)' program for people with PPA (Primary Progressive Aphasia): protocol for a randomised controlled pilot study

Cope PPA-Adaptation of the Biographic-Narrative Approach for Persons with Primary Progressive Aphasia: Protocol for Clinical Trial Design

Persons with primary progressive aphasia (PPA) often experience limitations in their quality of life (QoL). Some studies have shown positive effects of speech and language therapy on QoL in persons with PPA. However, there is still a lack of evidence for disorder-specific approaches for this important therapeutic goal. The biographic-narrative approach (narraktiv) has been shown to significantly improve QoL in persons with post-stroke aphasia. In the planned study, the biographic-narrative approach will be adapted for persons with PPA (Cope PPA), and its efficacy will be investigated. First, a focus group interview with five persons with PPA will be conducted to identify the wishes and needs of participants. Based on the results, the narraktiv manual according to Corsten et al. (2015) will be revised. Second, an efficacy study will be conducted according to the new Cope PPA manual with 24 persons with PPA in a waiting group control design. The primary outcome, QoL, will be assessed using questionnaires (Stroke and Aphasia Quality of Life Scale-39) and semistructured interviews. Depressive symptoms, life satisfaction and cognitive/communicative functioning will also be assessed. If Cope PPA proves efficacy, this study may help to improve the treatment of persons with PPA.

Determining capacity of people with dementia to take part in research: an electronic survey study of researcher confidence, competence and training needs

BACKGROUND

Researchers are required to determine whether a person has capacity to consent to a research study before they are able to participate. The Mental Capacity Act and accompanying Code of Practice for England and Wales provide some guidance on this process, but researchers have identified that it can be difficult to determine capacity to consent when a person has complex cognitive or communication needs. This study aimed to understand the experiences and opinions of researchers who recruit people with dementia to research projects, to inform the future development of training resources.

METHODS

A mixed method, cross-sectional, electronic survey was circulated via social media and research networks in England and Wales. The survey remained open for ten weeks and included open and closed questions exploring respondents' confidence in determining capacity in the context of recruiting people with dementia to consent, their views on training and support they have experienced and their suggestions for future training and support needs.

RESULTS

60 respondents completed the survey from across England and Wales. Although 75% of respondents had experience of determining capacity to consent with people with dementia to research, only 13% rated themselves as feeling 'very confident' in this. Qualitative content analysis of open responses led to the generation of six themes, explaining researchers' confidence, competence and future training needs in this area: (1) Researcher uncertainties, (2) Lack of time, (3) Balancing information complexity with accessibility, (4) Gatekeepers, (5) Existing enablers and (6) Envisioning future training.

CONCLUSIONS

Researchers would benefit from specific training in undertaking conversations around consent with people with dementia. People with dementia may have fluctuating capacity, and despite support from caregivers, researchers have little practical guidance on methods of determining a person's ability to understand or appreciate the information they have provided during the consent process. Given the development of large complex trials within dementia research, there is an urgency to develop specific and practical guidance and training for researchers working with people with dementia and their families.

The Effectiveness and Characteristics of Communication Partner Training Programs for Families of People With Dementia: A Systematic Review

BACKGROUND AND OBJECTIVES

Communication partner training (CPT) is essential in dementia care. Despite families being the largest group of community carers, previous reviews primarily focused on formal carers. This study aimed to understand the characteristics and effectiveness of CPT for families of people with dementia.

RESEARCH DESIGN AND METHODS

The systematic review included intervention/protocol studies on dementia CPT for families, excluding formal carers and programs not focused on communication. CINAHL, PsycINFO, SpeechBITE, Medline, SCOPUS, and Embase were searched between November 30 and December 6, 2021. After deduplication, 3,172 records were screened. Quality assessment used JBI Critical Appraisal tools and the Mixed Methods Appraisal Tool. Data synthesis utilized three reporting tools, the International Classification of Functioning, Disability, and Health, and content analysis.

RESULTS

Of 30 studies (27 programs), there were 10 quasi-experimental, 5 RCTs, 4 mixed methods, 4 case studies, 4 qualitative, and 2 protocols. Studies were published between 1998 and 2021 and included 671 family members. Characteristics varied with 7/27 programs including consumers during creation and one program including telehealth. One study included all reporting tool criteria. Programs typically used 4 intervention functions, with 12/27 programs addressing 3 behavior change areas. 33/74 outcome measures targeted the "Environment" of the person with dementia. Studies showed positive improvements in communication skills and knowledge, with mixed results on behavior/psychosocial outcomes. Qualitative results identified improvements in conversation and attitudes.

DISCUSSION AND IMPLICATIONS

CPT for families improves communication outcomes, however, quality of studies varied significantly. Future research should address gaps in telehealth, consumer involvement, and intervention descriptions.

Conversation coaching in dementia: a feasibility study

PURPOSE

Conversation abilities of people with dementia are impacted by cognitive-communication deficits. Communication interventions can improve quality of life by increasing positive interactions and well-being. This study evaluates the feasibility of a conversation coaching intervention for people with dementia and their communication partners.

METHOD

A mixed-method design was used. Thirty-four people were recruited over 12 months; 17 people with dementia and 17 communication partners. Participants with dementia were aged between 62 and 79 years (8 females, 9 males) and the communication partners were aged 33-77 years (5 males, 12 females). This conversation coaching intervention involved two assessment sessions (pre and post intervention) and 6 weekly sessions, alternating between individual and group-based sessions. These were facilitated by two experienced speech and language therapists with a three-month follow-up period. Participants were assessed initially and three months following intervention using Profiling Communication Ability in Dementia (P-CAD), Goal Attainment Scaling, and Capability Index for Older people (ICECAP-O).

RESULTS

Twenty-eight participants completed the conversation coaching intervention. P-CAD scores for people with dementia were maintained at three months for 71% (n = 10) showing no decline in function and 29% (n = 4) showed improvement. Using the Goal Attainment Scaling, all people with dementia and their communication partners reported that this conversation coaching intervention helped them achieve their individual communication goals. Ten (71%) people with dementia rated their well-being as higher on the ICE-CAP-O following intervention with 29% (n = 4) rating no change in well-being from initial assessment. Over three-quarters of communication partners, (79%: n = 11), reported an increased sense of well-being following intervention and 21% (n = 3) had no change in well-being.

CONCLUSIONS

Preliminary outcomes including participant feedback indicate that this conversation coaching intervention is feasible for people with dementia. The communication function and well-being of people with dementia were either maintained or improved. Conversation coaching intervention is collaborative and enhances the retained communication abilities of people living with dementia.

Primary progressive aphasia: six questions in search of an answer

Here, we review recent progress in the diagnosis and management of primary progressive aphasia-the language-led dementias. We pose six key unanswered questions that challenge current assumptions and highlight the unresolved difficulties that surround these diseases. How many syndromes of primary progressive aphasia are there-and is syndromic diagnosis even useful? Are these truly 'language-led' dementias? How can we diagnose (and track) primary progressive aphasia better? Can brain pathology be predicted in these diseases? What is their core pathophysiology? In addition, how can primary progressive aphasia best be treated? We propose that pathophysiological mechanisms linking proteinopathies to phenotypes may help resolve the clinical complexity of primary progressive aphasia, and may suggest novel diagnostic tools and markers and guide the deployment of effective therapies.

Phase I trial of the MuSic to CONnect (MuSiCON) protocol: feasibility and effect of choir participation for individuals with cognitive impairment

BACKGROUND

Individuals living in residential aged care facilities with cognitive decline are at risk of social isolation and decreased wellbeing. These risks may be exacerbated by decline in communication skills. There is growing awareness that group singing may improve sense of wellbeing for individuals with dementia. However, to date few studies have examined broader rehabilitative effects on skills such as communication of individuals with dementia.

AIMS

To determine the feasibility and acceptability of the MuSic to Connect (MuSiCON) choir and language/communication assessment protocol in people with cognitive impairment living in non-high-care wards of a residential facility.

METHODS

Six individuals with mild-moderate cognitive impairment participated (age range 55-91 years, five female, one male). A mixed method approach was used. Quantitative outcomes included attendance rates, quality of life and communication measures. The qualitative measure was a brief survey of experience completed by participants and carers post-intervention.

RESULTS

Overall, MuSiCON was perceived as positive and beneficial, with high attendance, perception of improved daily functioning and high therapeutic benefit without harmful effects. While there was no reliable change in communication skills over the course of the six-week intervention, most participants successfully engaged in the conversational task, suggesting it is a suitable and ecologically valid method for data collection.

CONCLUSIONS

The MuSiCON protocol demonstrated feasibility and was well received by participants and staff at the residential facility. A co-design approach is recommended to improve upon feasibility, acceptability and validity of the assessment protocol prior to Phase II testing.

Results from a randomised controlled pilot study of the Better Conversations with Primary Progressive Aphasia (BCPPA) communication partner training program for people with PPA and their communication partners

BACKGROUND

There has been a growing focus on functional communication interventions for primary progressive aphasia (PPA). These interventions aim to support individuals to participate in life situations. One such intervention, communication partner training (CPT) aims to change conversation behaviours in both the person with PPA and their communication partner (CP). CPT has a growing evidence base in stroke aphasia; however, these programmes are not designed to meet the needs of people with progressive communication difficulties. To address this, the authors developed a CPT program entitled Better Conversations with PPA (BCPPA) and undertook a pilot trial to establish for a future full trial; predicted recruitment rates, acceptability, an assessment of treatment fidelity and an appropriate primary outcome measure.

METHODOLOGY

This was a single-blind, randomised controlled pilot study comparing BCPPA to no treatment, delivered across 11 National Health Service Trusts in the UK. A random sample of eight recordings of local collaborators delivering the intervention were analysed to examine fidelity. Participants completed feedback forms reporting on acceptability. Pre- and post-intervention measures targeted conversation behaviours, communication goals and quality of life.

RESULTS

Eighteen people with PPA and their CPs (9 randomised to BCPPA, 9 randomised to no treatment) completed the study. Participants in the intervention group rated BCPPA positively. Treatment fidelity was 87.2%. Twenty-nine of 30 intervention goals were achieved or over-achieved and 16 of 30 coded conversation behaviours demonstrated change in the intended direction. The Aphasia Impact Questionnaire was identified as the preferred outcome measure.

CONCLUSION

The first randomised controlled UK pilot study of a CPT program for people with PPA and their families demonstrates BCPPA is a promising intervention. The intervention was acceptable, treatment fidelity high and an appropriate measure identified. Results of this study indicate a future RCT of BCPPA is feasible.

TRIAL REGISTRATION

Registered 28/02/2018 ISRCTN10148247 .

Maintenance and Generalization of Lexical Items in Primary Progressive Aphasia: Reflections From the Roundtable Discussion at the 2021 Clinical Aphasiology Conference

PURPOSE

Our capacity to engage in society and maintain meaningful relationships is dependent on intact communication skills. They are compromised in a neurodegenerative language disorder termed primary progressive aphasia (PPA). Behavioral interventions for PPA are sparse and often limited to impairment-based approaches or communication skills training, although various functional interventions have been also described. The slow but relentless language decline does not naturally support maintenance and/or generalization of treatment gains, which should be the ultimate goal of any therapy. However, in some cases and under certain conditions, maintenance and generalization may be accomplished. While each type of intervention has much to offer to the PPA population, the clinical and research realms can benefit from a collective professional discussion on aspects of intervention conducive to maintenance and/or generalization of treatment gains in PPA. Such a discussion took place at the 2021 Clinical Aphasiology Conference during two roundtable sessions. The aims of the sessions were to review the premises of successful treatment approaches in PPA and to discuss factors fostering or inhibiting maintenance and generalization in PPA.

CONCLUSIONS

Current literature delivers, albeit in small doses, encouraging evidence for clinicians providing language intervention to patients with PPA. Although PPA is a progressive disorder, both the immediate treatment effects and, in many cases, evidence of maintenance and generalization demonstrate that improvements may be long lasting and transferrable. Several factors may enhance maintenance and generalization effects, including repeated practice, working with multiple exemplars of treatment items, booster sessions, group programs with built-in individual sessions, spared semantics, and personal relevance, to name a few. With this evidence in hand, we need to become more diligent about measuring and reporting clinical outcomes and delivering interventions that support maintenance and generalization of therapeutic gains beyond the clinician's office.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.19836370.

Better conversations: a language and communication intervention for aphasia in posterior cortical atrophy

Posterior cortical atrophy (PCA) describes a neurodegenerative syndrome characterized by progressive difficulties in cortical visual and other posterior cortical functions consistent with parieto-occipital and occipito-temporal involvement. It is increasingly recognized that many patients develop difficulties with other aspects of daily living, in particular, with language and communication. We present a case emphasizing how language difficulties may emerge in PCA. Difficulties are interpreted as arising from interacting effects of linguistic deficits and impaired detection of nonverbal (particularly, visual) turns that normally facilitate, schedule, and disambiguate the exchange of verbal messages between speakers. We propose that relatively simple speech and language therapy interventions may hold promise in addressing language and communication difficulties as secondary features of PCA by targeting the behaviors of both the person with PCA and their communication partners.

Using the Medical Research Council framework and public involvement in the development of a communication partner training intervention for people with primary progressive aphasia (PPA): Better Conversations with PPA

Background

Primary progressive aphasia is a language-led dementia resulting in a gradual dissolution of language. Primary progressive aphasia has a significant psychosocial impact on both the person and their families. Speech and language therapy is one of the only available management options, and communication partner training interventions offer a practical approach to identify strategies to support conversation. The aim of this study was to define and refine a manual and an online training resource for speech and language therapists to deliver communication partner training to people with primary progressive aphasia and their communication partners called Better Conversations with primary progressive aphasia.

Methods

The Better Conversations with primary progressive aphasia manual and training program were developed using the Medical Research Council framework for developing complex interventions. The six-stage development process included 1. Exploratory review of existing literature including principles of applied Conversation Analysis, behaviour change theory and frameworks for chronic disease self-management, 2. Consultation and co-production over 12 meetings with the project steering group comprising representatives from key stakeholder groups, 3. Development of an initial draft, 4. Survey feedback followed by a consensus meeting using the Nominal Group Techniques with a group of speech and language therapists, 5. Two focus groups to gather opinions from people with PPA and their families were recorded, transcribed and Thematic Analysis used to examine the data, 6. Refinement.

Results

Co-production of the Better Conversations with primary progressive aphasia resulted in seven online training modules, and a manual describing four communication partner training intervention sessions with accompanying handouts. Eight important components of communication partner training were identified in the aggregation process of the Nominal Group Technique undertaken with 36 speech and language therapists, including use of video feedback to focus on strengths as well as areas of conversation breakdown. Analysis of the focus groups held with six people with primary progressive aphasia and seven family members identified three themes 1) Timing of intervention, 2) Speech and language therapists’ understanding of types of dementia, and 3) Knowing what helps. These data informed refinements to the manual including additional practice activities and useful strategies for the future.

Conclusions

Using the Medical Research Council framework to develop an intervention that is underpinned by a theoretical rationale of how communication partner training causes change allows for the key intervention components to be strengthened. Co-production of the manual and training materials ensures the intervention will meet the needs of people with primary progressive aphasia and their communication partners. Gathering further data from speech and language therapists and people living with primary progressive aphasia and their families to refine the manual and the training materials enhances the feasibility of delivering this in preparation for a phase II NHS-based randomised controlled pilot-feasibility study, currently underway.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12877-021-02561-8.

Treatment fidelity of technology-enhanced reading therapy (CommuniCATE) for people with aphasia

BACKGROUND

Treatment fidelity (TF), that is, the degree to which the treatment delivery has adhered to protocol, is an important aspect of establishing treatment validity and reliability. Research has shown that establishing TF is only done in a small percentage of aphasia treatment studies.

AIMS

This project supports the work of the CommuniCATE study, which explored the benefits of technology-enhanced aphasia therapy on participants' reading, writing, speech and conversation skills. It examines the TF of the Reading strand of the CommuniCATE project by assessing whether the therapy adhered to the protocol. The following research questions were asked: Does treatment delivery adhere to treatment protocol? Does the degree of TF vary according to the person delivering the therapy (i.e. student therapist or qualified therapist)? Does the degree of TF vary over time (early treatment sessions compared with later treatment sessions)? Was the checklist tool reliable?

METHODS & PROCEDURES

This study assessed the fidelity of 38 retrospective video recordings of therapy. It used a checklist measure of criteria to which the delivery of the sessions should adhere, and against which the sessions were rated. Participants were the people with aphasia receiving therapy, the students and qualified speech and language therapists delivering therapy, and the independent raters assessing the sessions. A sample of sessions was randomly chosen, including sessions delivered by qualified therapists and by students, and sessions from different time points in the treatment process. The fidelity was rated by the first author, and the fidelity rating calculated as a percentage. Comparisons in fidelity scores for the different variables were drawn using Mann-Whitney tests. The reliability of the checklist was assessed through inter and intra-rater reliability testing, and the results were analysed using Kappa statistics.

OUTCOMES & RESULTS

High fidelity was found across all therapy conditions with a mean score of 98.2%. Fidelity scores were not affected by the administrator of therapy; sessions delivered by qualified and student therapists were rated equally highly. There was a small but significant effect of time, with later treatment sessions scoring more highly than earlier sessions. However, scores across both periods > 90%. Inter-rater reliability found a high percentage agreement of 93.3% and a Poor Kappa agreement level. Intra-rater agreement found a high percentage agreement of 97.3% and a Fair Kappa agreement level.

CONCLUSIONS & IMPLICATIONS

The CommuniCATE reading therapy was implemented as per the protocol across time points, and withstood delegation to students. The high fidelity and good reliability scores have positive implications for the study's validity and reliability, and for the study's replication.

WHAT THIS PAPER ADDS

What is already known on the subject TF refers to the degree to which the delivery of core components of a treatment matches the implementation guidelines, that is, the adherence to protocol. Despite the acknowledged importance of TF reporting, this is often neglected in the literature. What this paper adds to existing knowledge This paper shows that the TF assessment of the CommuniCATE study (reading strand) found a 98.2% fidelity score, and that high fidelity was not compromised across treatment conditions. This paper outlines the principles of TF and highlights the need for measures to be in place to establish TF, for example, manuals, training and supervision; and to monitor TF, for example, via the use of checklists. This paper also underlines the scarcity of TF measures and checks in aphasia research. This paper therefore serves as a model of TF practice in aphasia therapy research. What are the potential or actual clinical implications of this work? This study contributes to the findings of the CommuniCATE project (reading strand), and the high fidelity findings enhance the validity of the project and indicate that the therapy manual and training enable accurate implementation of delivery. This paper also contributes to the literature on TF evaluation in aphasia studies, which is presently lacking, and highlights the need for increased focus on the optimum strategies of TF reporting.

A Systematic Review of Transcranial Direct Current Stimulation in Primary Progressive Aphasia: Methodological Considerations

A variety of tDCS approaches has been used to investigate the potential of tDCS to improve language outcomes, or slow down the decay of language competences caused by Primary Progressive Aphasia (PPA). The employed stimulation protocols and study designs in PPA are generally speaking similar to those deployed in post-stroke aphasic populations. These two etiologies of aphasia however differ substantially in their pathophysiology, and for both conditions the optimal stimulation paradigm still needs to be established. A systematic review was done and after applying inclusion and exclusion criteria, 15 articles were analyzed focusing on differences and similarities across studies especially focusing on PPA patient characteristics (age, PPA variant, language background), tDCS stimulation protocols (intensity, frequency, combined therapy, electrode configuration) and study design as recent reviews and group outcomes for individual studies suggest tDCS is an effective tool to improve language outcomes, while methodological approach and patient characteristics are mentioned as moderators that may influence treatment effects. We found that studies of tDCS in PPA have clinical and methodological and heterogeneity regarding patient populations, stimulation protocols and study design. While positive group results are usually found irrespective of these differences, the magnitude, duration and generalization of these outcomes differ when comparing stimulation locations, and when results are stratified according to the clinical variant of PPA. We interpret the results of included studies in light of patient characteristics and methodological decisions. Further, we highlight the role neuroimaging can play in study protocols and interpreting results and make recommendations for future work.

Counseling and Care Partner Training in Primary Progressive Aphasia

PURPOSE

Individuals with primary progressive aphasia (PPA) experience loss of communication abilities in the context of neurodegenerative disease. Consequently, many individuals with PPA endorse negative psychosocial effects, including social isolation, reduced communication confidence, and depression. Incorporating communication-centered counseling early and often within the speech-language pathology treatment framework is a vital component in holistically addressing the multifaceted ramifications of living with this devastating disorder. Additionally, care partners are key stakeholders in the treatment dynamic. Involving these individuals in the treatment paradigm through care partner training is crucial for facilitating optimal communication in daily life. The purpose of this narrative literature review is to discuss existing research regarding counseling and care partner training in PPA and to outline additional treatment considerations and future research needs in this understudied area.

CONCLUSIONS

Relative to studies that delineate restitutive speech-language interventions for PPA, the literature pertaining to counseling and care partner training is limited. Available evidence supports the utility of these approaches, which serve as complementary components to restitutive and compensatory speech-language intervention. Additional research is warranted to support generalizability and long-term benefit of these interventions, and to address facets of counseling and care partner training that have not been explored in PPA (e.g., counseling interventions drawing from specific psychotherapeutic traditions; multicultural counseling) or have only been explored to a limited degree (e.g., interventions that jointly provide counseling and partner training).

Developing, Implementing, and Improving Assessment and Treatment Fidelity in Clinical Aphasia Research

Purpose The purpose of this study was to describe the development and implementation of a fidelity program for an ongoing, multifacility, aphasia intervention study and to explain how initial fidelity measures are being used to improve study integrity. Method A Clinical Core team developed and incorporated a fidelity plan in this study. The aims of the Clinical Core team were to (a) supervise data collection and data management at each clinical site, (b) optimize and monitor assessment fidelity, and (c) optimize and monitor treatment fidelity. Preliminary data are being used to guide ongoing efforts to preserve and improve the fidelity of this intervention study. Results Preliminary results show that specific recruitment strategies help to improve appropriate referrals and that accommodations to participants and their families help to maintain excellent retention. A streamlined and centralized training program assures the reliability of assessors and raters for the study's assessment and treatment protocols. Ongoing monitoring of both assessment and treatment tasks helps to maintain study integrity. Less-than-optimal interrater reliability data for the raters of some of the discourse measures guided the Clinical Core team to address the training and coding inconsistencies in a timely manner. Conclusions The creation of a Clinical Core team is instrumental in developing and implementing a fidelity plan for improved assessment and treatment fidelity. Intentional planning and assignment of study staff to implement and monitor ongoing fidelity measures assures that clinical data are reliable and valid. Ongoing review of the plan shows areas of strengths and weaknesses for continuing adjustments and improvement of study fidelity.

How Evidence-Based Practice (E3BP) Informs Speech-Language Pathology for Primary Progressive Aphasia

Amelioration of communication impairment in primary progressive aphasia (PPA) is an area of clinical importance and current research. Speech-language pathologists (SLPs) have a range of skills and interventions to support communication in PPA; however, underrecognition of their role and low referral rates is an ongoing concern. The E3BP conceptualization of evidence-based practice comprises 3 components: research-based evidence, practice-based evidence, and informed patient preferences. Here, we will describe how evidence for managing the communication difficulties experienced by individuals with PPA exists at all 3 levels of the (E3BP) model, highlighting how this allows SLP interventions to be both evidence based and patient centered. We encourage health professionals to value and utilize the wide range of services that SLPs can offer when working with individuals with PPA, to educate, remediate everyday linguistic skills, increase daily participation, and maximize overall quality of life.

Speech and language therapy approaches to managing primary progressive aphasia

The term primary progressive aphasia (PPA) describes a group of neurodegenerative disorders with predominant speech and language dysfunction as their main feature. There are three main variants - the semantic variant, the nonfluent or agrammatic variant and the logopenic variant - each with specific linguistic deficits and different neuroanatomical involvement. There are currently no curative treatments or symptomatic pharmacological therapies. However, speech and language therapists have developed several impairment-based interventions and compensatory strategies for use in the clinic. Unfortunately, multiple barriers still need to be overcome to improve access to care for people with PPA, including increasing awareness among referring clinicians, improving training of speech and language therapists and developing evidence-based guidelines for therapeutic interventions. This review highlights this inequity and the reasons why neurologists should refer people with PPA to speech and language therapists.

Speech databases for mental disorders: A systematic review

BACKGROUND

The employment of clinical databases in the study of mental disorders is essential to the diagnosis and treatment of patients with mental illness. While text corpora obtain merely limited information of content, speech corpora capture tones, emotions, rhythms and many other signals beyond content. Hence, the design and development of speech corpora for patients with mental disorders is increasingly important.

AIM

This review aims to extract the existing speech corpora for mental disorders from online databases and peer-reviewed journals in order to demonstrate both achievements and challenges in this area.

METHODS

The review first covers publications or resources worldwide, and then leads to the reports from China, followed by a comparison between Chinese and non-Chinese regions.

RESULTS

Most of the speech databases were recorded in Europe or the United States by audio or video. Some were even supplemented by brain images and Event-Related Potential (ERP) statistics. The corpora were mostly developed for patients with neurocognitive disorders like stutter and aphasia, and mental illness like dementia, while other types of mental illness such as bipolar disorder, anxiety, depression and autism were scarce in number in database development.

STRENGTHS AND LIMITATIONS

The results demonstrated that database development of neurocognitive disorders in China is much scarcer than that in some European countries, but the existing databases pave an instructive road for psychiatric problems. Also, the methods and applications of databases from the leading countries are inspiring for Chinese scholars, who are searching methods for developing a comprehensive resource for clinical studies.