Elicit: Impact of Evidence-Based Language Interventions on Teenagers
Impact of Evidence-Based Language Interventions on Teenagers
What is the impact of evidence-based language interventions on academic performance and social communication skills in teenagers with language disorders?
Language interventions yield substantial improvements in both academic performance and social communication among teenagers with language disorders, with particularly strong effects in word-finding (d = 2.5) and social abilities (d = 1.36).
Abstract
Evidence-based language interventions improve both academic performance and social communication among teenagers with language disorders. Semantic approaches that target word-finding report large gains (d = 2.5), while direct one‐to‐one speech therapy and explicit vocabulary training yield medium effect sizes (d = 1.06 and d = 1.07, respectively). Classroom-based narrative and reading comprehension programs also show positive outcomes, with narrative skills improving (d = 0.296) and reading interventions noted for producing large qualitative effects.
Studies assessing social communication report a 10.5–point gain on standardized measures over 8 weeks and improvement in social abilities with an effect size of d = 1.36. Interventions delivered via individual sessions, group classroom settings, technology-enhanced formats, and teacher-mediated strategies demonstrate that tailoring the method to target specific language and communication skills can enhance both academic and social outcomes for teenagers with language disorders.
Methods
We analyzed 25 sources from an initial pool of 500, using 8 screening criteria. Each paper was reviewed for 6 key aspects that mattered most to the research question.
Papers identified with Elicit search: n = 500
Papers screened out: n = 475
Papers included for extraction: n = 25
Screening
We screened in sources based on their abstracts that met these criteria:
- Population Diagnosis: Does the study focus primarily on participants with diagnosed language disorders (specific language impairment, developmental language disorder, or language-based learning disabilities)?
- Age Range: Are the study participants within the age range of 13-19 years?
- Intervention Characteristics: Is the intervention an evidence-based language intervention delivered by qualified professionals?
- Study Design: Is the study design either a randomized controlled trial, quasi-experimental study, systematic review, or meta-analysis?
- Outcome Assessment: Does the study measure either academic performance and/or social communication skills as outcomes?
- Primary Condition: Is the study focused on language disorders WITHOUT primary focus on autism spectrum disorder, intellectual disability, or hearing impairment?
- Study Type: Is the study an intervention study (not a descriptive study, case report, or theoretical paper)?
- Sample Size: Does the study include at least 10 participants?
Data extraction
We asked a large language model to extract each data column from each paper, including:
- Study Design Type: Identify the specific type of study design from the full text.
- Randomization Details: If the study is an RCT, extract specific randomization information.
- Participant Demographics: Extract total number of participants, age range, gender distribution, specific language disorder characteristics, and inclusion/exclusion criteria.
- Intervention Characteristics: Describe the specific language intervention.
- Primary Outcome Measures: List all primary outcome measures related to academic performance and social communication skills.
- Key Intervention Outcomes: Extract statistically significant findings related to changes in academic performance and improvements in social communication.
Results
Characteristics of Included Studies
| Study Design | Intervention Type | Population Characteristics | Primary Outcomes | Full text retrieved |
|---|---|---|---|---|
| Quasi-experimental intervention study | YouTube vlogging program | 50 teenagers (13-18 years) with speech and language impairments | Communication skills improvement | Yes |
| Quasi-experimental study | Oral placement and expressive therapies | 60 adolescents with articulation disorders | Speech intelligibility | No |
| Quasi-experimental study | Early Intervention Programme (EIP) | 96 adolescents with specific developmental language disorder (SDLD) | School achievement, social and emotional adjustment, behavior, language skills | No |
| Quasi-experimental intervention study | InterAction (interactive virtual reality training) | 29 adolescents with Developmental Language Disorders (DLD) | Social abilities, cognitive Theory of Mind | No |
| Quasi-experimental single baseline design | Semantic intervention | 25 students (16;4–18;4 years) with Language Disorder | Word-finding abilities | Yes |
| Quasi-experimental study | Direct 1:1 Speech and Language Therapy (SLT) | 72 students (9-17 years) with severe DLD | Various language targets | Yes |
| Systematic review | Various pragmatic language interventions | School-age children with language impairment | Social communication behaviors | No |
| Randomized controlled trial | Narrative, vocabulary, and combined interventions | 358 students (mean age 12;8 years) with language disorder | Narrative and vocabulary skills | Yes |
| Systematic review and meta-analysis | Various phonological interventions | Children (3-18 years) with developmental speech and/or language disorders | Speech production accuracy, phonological representation skills | No |
| Review article | Various interventions (curriculum-based, parent-based, play therapy) | Bilingual children with developmental language disorder | Language skills, academic achievement | Yes |
Effects of Language Interventions
Academic Performance Outcomes
| Intervention Approach | Academic Domain | Effect Size | Implementation Context |
|---|---|---|---|
| Semantic intervention | Word-finding | d = 2.5 | Individual sessions |
| Direct 1:1 Speech and Language Therapy | Various language targets | d = 1.06 | Specialist school setting |
| Narrative intervention | Narrative skills | d = 0.296 | Classroom-based |
| Direct vocabulary intervention | Vocabulary knowledge | d = 1.07 | Individual sessions |
Social Communication Outcomes
| Communication Skills Targeted | Measurement Approach | Reported Outcomes | Duration |
|---|---|---|---|
| General communication skills | Pre-post intervention assessment | Significant improvement (mean difference 10.5 points) | 8 weeks |
| Social abilities | Nonoverlap of all pairs test | Significant improvement (d = 1.36) | 9 weeks |
Implementation Factors
Delivery Methods
- Individual sessions: Effective for personalized approaches.
- Classroom-based interventions: Integrated into students’ regular learning environments.
- Group interventions: Balanced individualized attention with peer interaction.
- Technology-based delivery: Engaged students through innovative approaches.
- Teacher-mediated interventions: Potential for widespread classroom impact.
Duration and Intensity
- Durations of interventions ranged from 6-9 weeks to several years, with individual session lengths varying between 30-60 minutes.
Context Considerations
- The varying age range and types of language disorders influenced the study designs, delivery methods, and outcomes assessed.
References
- Vocabulary intervention for adolescents with language disorder: a systematic review. International journal of language and communication disorders
- Language use in social interactions of school-age children with language impairments: an evidence-based systematic review of treatment. Language, Speech & Hearing Services in Schools