Big Nine reference9 areas

The Big Nine clinical areas

Choose an area to explore its scope, review topics, and clinical reasoning.

The Big Nine at a glance

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Speech Sound ProductionArea 1 of 9

Speech Sound Production

Articulation, phonology, motor speech disorders, and apraxia of speech.

Developmental norms for speech sound acquisition, phonological processes (and when they should disappear), differential diagnosis of articulation vs phonological disorders vs childhood apraxia of speech, motor speech disorders in adults (dysarthria types and their lesion sites), and evidence-based treatment approaches for each.

High-yield topics

  • Phonological process suppression ages
  • Childhood apraxia of speech vs phonological disorder differentiation
  • Six dysarthria types and their associated lesion locations
  • Stimulability and complexity-based treatment approaches
  • Cycles approach for severe phonological disorders

Speech sound production is one of the highest-volume clinical knowledge areas in SLP exam prep. Expect questions that cross assessment, differential diagnosis, and evidence-based treatment selection.

FluencyArea 2 of 9

Fluency

Stuttering and cluttering across the lifespan.

The difference between developmental disfluency and persistent stuttering, risk factors for chronicity, the demands and capacities model, the Lidcombe Program for preschoolers, evidence-based approaches for school-age and adult stuttering, cluttering identification, and the role of avoidance and self-disclosure.

High-yield topics

  • Risk factors for persistent stuttering vs recovery
  • Lidcombe Program parameters and ages
  • Stuttering modification (van Riper) vs fluency shaping
  • Cluttering core features
  • Counseling approaches and the affective/cognitive components

Fluency is a smaller area, but the questions tend to be conceptually tricky. Know your treatment frameworks cold, especially Lidcombe parameters and the difference between fluency shaping and stuttering modification.

Voice and ResonanceArea 3 of 9

Voice and Resonance

Voice disorders, resonance disorders, and laryngectomy rehabilitation.

Anatomy and physiology of voice production, common voice disorders (nodules, polyps, paralysis, presbylaryngis, MTD), instrumental assessment (videostroboscopy), perceptual rating scales (CAPE-V, GRBAS), resonance disorders (hypernasality, hyponasality, mixed), VPI causes and management, and laryngectomy rehab (electrolarynx, esophageal speech, tracheoesophageal puncture).

High-yield topics

  • CAPE-V and GRBAS perceptual rating
  • Voice disorder etiology: phonotrauma vs neurogenic vs functional
  • Resonance balance assessment and VPI
  • Cleft palate management timeline
  • TEP vs electrolarynx vs esophageal speech

Voice questions often require integrating anatomy with assessment findings. Resonance and cleft palate questions tend to be application-level. Expect a clinical scenario, not a recall question.

Receptive and Expressive LanguageArea 4 of 9

Receptive and Expressive Language

Language disorders across the lifespan: DLD, aphasia, language-learning disabilities.

Typical language development milestones, Developmental Language Disorder (DLD), language-based learning disabilities, autism-related language profiles, aphasia types and their lesion sites (Broca's, Wernicke's, conduction, global, anomic, transcortical), assessment tools (CELF, PLS, BDAE, WAB), and evidence-based treatment approaches.

High-yield topics

  • Aphasia classification by fluency, comprehension, and repetition
  • DLD vs language difference (multilingual learners)
  • Typical morpheme acquisition (Brown's 14)
  • Standardized assessment selection by age and population
  • Constraint-induced language therapy and SFA

Language is one of the largest SLP knowledge areas. Aphasia questions are often clinically detailed, so know your fluent/nonfluent distinction and lesion correlates.

Social Communication / PragmaticsArea 5 of 9

Social Communication / Pragmatics

Pragmatic language disorders, autism, and social communication intervention.

Pragmatic milestones, social communication profiles in autism, social pragmatic communication disorder (SPCD), assessment of pragmatic skills, evidence-based interventions (PECS for some learners, video modeling, social stories, peer-mediated interventions), and the SLP role on multidisciplinary teams.

High-yield topics

  • Autism communication profiles and red flags
  • SPCD diagnostic criteria
  • Evidence base for video modeling and peer-mediated intervention
  • Joint attention as a pivotal skill
  • Functional communication training

Pragmatics overlaps with autism, AAC, and language. Questions often blend two areas. Expect a child described with both pragmatic and language deficits, and you have to choose the priority intervention.

Cognitive CommunicationArea 6 of 9

Cognitive Communication

TBI, dementia, right-hemisphere damage, and executive function.

Cognitive-communication impairments after traumatic brain injury, dementia subtypes (Alzheimer's, vascular, frontotemporal, Lewy body, primary progressive aphasia), right-hemisphere damage profiles (anosognosia, neglect, prosody), Rancho Los Amigos levels, executive function assessment, and intervention approaches including spaced retrieval and external memory aids.

High-yield topics

  • Rancho Los Amigos cognitive recovery levels
  • Alzheimer's vs FTD vs vascular dementia presentation
  • Spaced retrieval for memory in dementia
  • Right-hemisphere syndrome features (neglect, anosognosia, prosody)
  • Errorless learning and external memory aids

Cognitive communication is a major area for medical SLPs and a high-yield exam-prep topic. Dementia subtype differentiation is a frequent clinical reasoning stem.

Augmentative and Alternative Communication (AAC)Area 7 of 9

Augmentative and Alternative Communication (AAC)

Unaided and aided AAC, feature matching, and access methods.

AAC system types (unaided, aided, low-tech, high-tech), feature matching to user abilities, symbol systems (PCS, Bliss, line drawings), access methods (direct selection, scanning, eye gaze), partner-assisted scanning, vocabulary selection (core vs fringe), candidacy myths, and evidence-based AAC implementation including aided language stimulation.

High-yield topics

  • Core vs fringe vocabulary
  • Feature matching for access methods
  • Aided language stimulation / modeling
  • Multi-modal communication (AAC does not replace speech)
  • Common AAC candidacy myths to debunk

AAC questions tend to be application-level. Expect clinical scenarios where you have to choose the right system or access method for a described user.

HearingArea 8 of 9

Hearing

Audiologic basics, hearing screening, aural rehabilitation, and the SLP scope.

Anatomy of the ear, conductive vs sensorineural vs mixed hearing loss, audiogram interpretation, hearing screening protocols, hearing aids and cochlear implants, aural rehab for adults and children, the SLP scope of practice in hearing (we screen, we rehab, audiologists diagnose), and the speech banana.

High-yield topics

  • Audiogram reading: type, degree, configuration
  • Conductive vs sensorineural identification
  • Speech banana and the impact of high-frequency loss
  • Cochlear implant candidacy and outcomes
  • SLP vs audiologist scope of practice

Hearing is smaller in volume but high leverage. Audiogram interpretation is the kind of skill that rewards concrete, repeated practice.

Feeding and Swallowing (Dysphagia)Area 9 of 9

Feeding and Swallowing (Dysphagia)

Dysphagia assessment and management across the lifespan.

Phases of swallowing, cranial nerves involved (V, VII, IX, X, XI, XII), bedside clinical swallow evaluation, instrumental assessment (MBSS/VFSS and FEES), penetration-aspiration scale, IDDSI levels, compensatory strategies vs rehabilitative exercises (Mendelsohn, Masako, Shaker, EMST), pediatric feeding disorders, and post-stroke/TBI dysphagia management.

High-yield topics

  • Cranial nerves of swallowing and what each contributes
  • Penetration-Aspiration Scale (PAS)
  • IDDSI levels for liquids and solids
  • Compensatory strategies vs rehabilitative exercises
  • MBSS vs FEES strengths and limitations
  • Pediatric feeding red flags and the SLP role

Feeding and swallowing is a high-value review area. Cranial nerves, PAS scoring, and the difference between compensatory and rehabilitative strategies are useful concepts to practice.

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Disclaimer: Praxis® is a registered trademark of Educational Testing Service (ETS). SLP Study Hub is not affiliated with or endorsed by ETS or ASHA. The Big Nine taxonomy is published by ASHA as part of the SLP scope of practice.