An Interdisciplinary Approach to Assessing/Managing CAPD Larry Medwetsky, Ph.D. VP, Clinical Services Rochester Hearing and Speech Center 585-271-680 x 245 [email protected] Laura Riddle, Ph.D. Assistant Professor Department of Communication Sciences and Disorders: Nazareth College 585-389-2442 [email protected] Overview of Presentation Overview of Processes Engaged in Spoken Language Processing Assessment of the Various Processing Domains (Audiology and S&L Procedures) Management of Processing Related Difficulties: Specific Techniques Environmental Modifications/Compensations General Compensatory Strategies Overview of Processes Engaged in Spoken Language Processing Transduction Acoustic stimuli undergo many conversions, ultimately resulting in neuroelectric impulse patterns that convey intensity, frequency, temporal, intonation/amplitude contours, phase information. Pattern Matching (Decoding) The neuronal impulses are relayed via the Central Auditory Nervous System to the higher order language processing centers in the Cortex and stimulate various neuronal combinations “prototypes” in long-term memory (LTM). Decoding- cont’d Language cortical neuronal regions include: - the language centers in the brain (for @ 95% of the population, this is in left hemisphere) - the rhythmic processing areas of the brain (for @ 95% of the population, this is in the right hemisphere) The above occurs because the rapid, short duration information is processed/analyzed by neurons in the left hemisphere, while the slower, longer duration information is analyzed by neurons in the right hemisphere. Short-Term/Conscious Memory Neurons in LTM are in a resting state. Stimulation of the various neuronal synapses/connections results in activation of these neurons, and, if sufficient attention is allocated, results in conscious awareness of the “item” (short-term/working memory). Integration Somehow, the derived segmental information from the left hemisphere language region is integrated with the derived suprasegmental information from the right hemisphere. Attentional Allocation This is the process whereby the brain determines which information to focus on and which to ignore. This is because humans are limited to how much they can process and attend to at any one point in time. Attentional allocation is important for: initial priming/excitation of neurons engaged in processing of selected information maintenance of neuronal firing to maintain information in short-term memory selectively attending to target stimuli in the face of competing stimuli switching of attention when multi-tasking, thus, maintaining neuronal firing for multiple regions Short-Term Memory (STM) Span STM span refers to the maximum number of units/ chunks that an individual can maintain and recall. It is based on the maximum # of neuronal regions that can be maintained in an active firing state. Neurons can remain in an active firing state for 1-2 seconds, unless some sort of stimulation “attention” is directed to that neuronal cluster, resulting in renewed activation prior to returning to its resting state. Recent research suggests that the maximum limit is 4-5 neuronal regions firing at a time. Chunking allows for bigger sized units (e.g., 7 digit phone number cab be grouped into three chunks /271/ /06/ /80/. Sequencing The part of the brain that directs attention “Pre-Frontal Cortex” also somehow maintains the sequence in which the information has been processed (be it in the receptive or output side). Selective Attention This refers to the ability to focus on a “target” stimulus and to ignore competing stimuli. When the competing stimulus consists of nonlinguistic noise, the brain analyzes the different acoustic characteristics and attempts to filter the speech from the noise Selective Attention- cont’d When the competing stimuli consists of speech (e.g., group listening settings), the brain uses spatial cues, fundamental pitch contours, etc., to perceptually separate the incoming information and then allocate attention to the source of interest and ignore or block the competing source. Divided/Shared Attention The ability to process and activate two or more neuronal regions simultaneously; some tasks may, in fact, involve fast switching rather than simultaneous processing (e.g., note-taking) but this still requires more information to be processed per unit time. Phonological Awareness Over time, if everything develops normally an individual’s brain derives and stores the phonological codes for that language, manipulate the phonemes (e.g., deletions, substitutions, additions, etc.), and, learns the written symbolic code that represents the phonemes in their language (i.e., phonics). Interdisciplinary Assessment of Processing Domains Role of the SLP Use the results of the Auditory Processing Evaluation, as well as the presenting difficulties, to guide assessment * Note: it is possible that an SLP may initially have conducted a basic language test battery but subsequent to an auditory processing evaluation may conduct further testing based on the new results obtained. Phonemic Awareness Audiology: Phonemic Synthesis Test Phoneme Blending Test Stimulus items are presented 2 seconds apart 3-4 phoneme words SLP (most of time): Lindamood Auditory Conceptualization Test-3 Discrimination of speech sounds Analyzing the number and order of speech sounds/syllables Tracking speech sound changes at both the phoneme and syllable levels Phonemic Awareness SLP: More in-depth assessment of phonemic awareness Standardized Tests Comprehensive Test of Phonological Processing (CTOPP) (Wagner et. Al., 1999) Elision, Sound Blending, Sound Segmentation Blending and Segmentation of real and nonsense words Rapid Naming (letters, digits, colors, objects) Phonological Working Memory (non-word repetition) Phonemic Awareness SLP: More in-depth assessment of phonemic awareness Phonological Awareness Test-2 (PAT-2) (Robertson & Salter, 2007) Rhyming, syllable blending and segmentation, sound isolation, sound blending and segmentation, substitution Letter-sound knowledge Non-word Decoding Phonemic Awareness SLP: More in-depth assessment of phonemic awareness Standardized Tests Pre-reading Inventory of Phonological Awareness (Dodd, et. al., 2003) Rhyming, syllable segmentation, alliteration, sound isolation, sound segmentation Letter-sound knowledge Phonemic Awareness SLP: Standardized Tests – assessing 1-2 skills Phonological Awareness Skills Program Test (Rosner, 1999) Deletion, substitution Test of Phonological Awareness (Torgesen & Bryant, 1994) Sound Matching – initial, final Phonemic Awareness Phonemic Synthesis vs Phoneme Blending (CTOPP) Often see inconsistent results but are they inconsistent? Difference between tests Length of Inter-stimulus interval (@ 2 secs vs 1 sec apart) Live (+ lipreading) vs taped voice Shorter vs longer words Phonemic Awareness Phonemic Awareness Error Patterns Position of sound in word Type of sounds, e.g., blends Number of sounds in the word Nonsense vs real words Response delays Audiological Determination of Lexical Decoding Speed Difficulty Background: Individual requires more time to process and match stimulus to what is stored in LTM. Staggered Spondaic Word Test Right Ear Left Ear Non-Competing Competing Up Stairs Down Non-Competing Town A pattern indicating decoding speed difficulty is more errors on second spondee (due to slow processing, attention too long on first spondee, and, thus neuronal representation of second spondee fades away). For sentences: if decoding speed is the primary difficulty, may see more word errors at the end of the sentence Lexical Decoding Speed SLP Testing (ruling out knowledge issues): Semantic Skills Vocabulary, Antonyms, Synonyms, Multiple Meaning words, Word Definitions PPVT-4, EVT, LPT3, Word Test2-E, CELF-4, CASL Morphology/Syntax CELF-4, TOLD-P3, Language Sample Lexical Decoding Speed SLP Testing: Morphological Awareness Spelling lists of words that are morphologically different (e.g., kicked, gladly) Cloze procedures: produce a derived word Word judgment tasks Suffix addition tasks Masterson & Apel, 2000 Lexical Decoding Speed SLP Testing: • Word Retrieval Ability • Single-word level • Test of Word Finding-2 (German, 2000) • Discourse level • Test of Word Finding in Discourse (German, 1991) • Language Sample with maze analysis: Story retell and conversation Lexical Decoding Speed Word Retrieval Difficulty Revisions Repetitions of words or parts of words Word choice errors (substitute one word for the target word) Word omissions Pauses/delays within utterances Miller, 1991 Fading-Memory Background: Individual is unable to allocate attention effectively, consequently earlier presented information fades rapidly from short-term memory Staggered Spondaic Word Test Non-Competing Competing Right Ear Up Stairs Left Ear Down Non-Competing Town Individual has more errors on the first spondee. Also, if individual can’t blend on fly, then on a phonemic blending task may see more errors on earlier phonemes If predominantly fading-memory difficulty, on sentence recall individual exhibits more errors on earlier sentence portions. Short-Term Memory Span Assessment Background: STM Span refers to # of units that can be recalled by an individual, usually assessed in serial fashion. Test of Auditory Processing Skills examines three different stimuli: • Digits • Sentences • Unrelated Words The first two tests are rote-memory tasks (minimal context present), while sentence recall engages syntax, semantic relations, world knowledge, prosody. Possible STM Span Patterns Results on all three tests within normal limits (WNL): either no or minimal processing issues (though still may exhibit phonological awareness difficulties) Results on all three tests significantly below age norms: significant processing difficulties, likely impacting on basic language skills Difficulty on digit/word STM span, WNL for sentences (likely processing related issues and is the most common finding at RHSC Audiology) WNL for digits/sentences, difficulty with words (lexical decoding speed likely the major issue) WNL for digits/words, poor sentence recall (likely language disorder) WNL for digits, significant for words/sentences (typically observed in individuals with Autism/Asperger’s) Short Term Memory SLP Testing: Phonological Working Memory Non-word Repetition Tasks CTOPP (Wagner et. Al., 1999) Integration: Audiological Signs Background: Individual is either unable to integrate right and left hemisphere information, or, reveals right ear dominance on competing stimuli tasks SSW Test Significant Left Competing finding (relative to peers, significantly more errors than in the other conditions ) Competing Sentences Test Significantly poorer left versus right ear selective attention recall score relative to peers Pitch Pattern Sequences Test Verbal labeling of thee tone sequence is significantly poorer than non-verbal (hummed response) Integration SLP Testing: Prosody Difficulty processing prosodic cues Informal observation of comprehension of sentences when stress and intonation are varied Structured tasks of processing: vary the stress on words and determine number of units being produced (Wells & Peppe, 2003) Integration SLP Testing: Prosody Difficulty processing prosodic cues Emotional Prosody – observe response to words conveyed with different emotions Difficulty producing prosodic cues Observe intonation and stress patterns during a variety of language sampling conditions Integration Figurative Language Idioms, similes, metaphors, proverbs, humor Interpreted using contextual cues, situational cues and mental imagery (Nippold & Duthie, 2003) Standardized tests can be used CASL, TLC Informal tasks – better option Interpret meaning of figurative expressions commonly heard within environment Integration Conversational Skills Individual must attend to facial expression, body language in addition to oral language to interpret messages Individual must divide attention to accomplish this Conversational samples in both paired and group settings Integration Conversational Skills Analyze topic initiation, topic maintenance and turn taking skills Analyze ability to look at partner, respond with appropriate facial expressions Analyze pre-suppositional skill; takes listener perspective; uses clear referents Analyze repair strategies Analyze response delays Sequencing Staggered Spondaic Word Test Right Ear Left Ear Non-Competing Up Competing Stairs Down Non-Competing Town Individual has to recall at least three of the four words. Examples of sequencing errors may be: /Up-town/ /Down-Town/ The Lindamood Auditory Conceptualization-3 test involves significant sequencing ability on three of their tasks, and, it is likely that for many children with phonological awareness difficulty, it may be due to higher order mental manipulations of phonemes/ syllables involving sequencing difficulties. Sequencing Oral Directions Token Test for Children-2 (McGhee et. al., 2007); CELF-4 (Semel, et. al., 2003) Assess informally within classroom To assess sequencing, child must have the concept knowledge Organization Narrative Language Story Generation and Story Re-tell Test of Narrative Language (Gillam & Pearson, 2004) Analyze for story grammar, cohesion, inference Organization Written Language Skills needed: Planning and organizing Drafting Revising and editing Knowledge of text structure (narrative, expository) Language knowledge: discourse, sentences, words Writing conventions Organization Written Language Standardized writing tests (TEWL-2; TOWL-3; OWLS: Written Language Scale) Authentic assessment approaches (informal assessments examining writing samples) Reading and Spelling Reading Assessment Word Recognition Skills Word Identification (sight reading) Word Decoding (decode nonsense words) Woodcock Reading Mastery Tests-Revised (Woodcock, 1987) Reading and Spelling Reading Assessment Text level reading Accuracy (words read correctly), rate, fluency Reading Comprehension Gray Oral Reading Test-4 (Weiderholt Bryant, 2001) Gray Silent Reading Test Weiderholt & Blalock, 2000) Reading and Spelling Reading Assessment Reading Miscues Insertions, Omissions, Substitutions Self corrections and Repetition Analyze for syntactic acceptability, semantic acceptability, graphic similarity, sound similarity, selfcorrection Reading Miscue Inventory (Goodman, Watson & Burke, 1987) Reading and Spelling Spelling Assessment Test of Written Spelling (Larsen, et. al., 1999) Spell Performance Evaluation for Language and Literacy (SPELL) (Masterson, et. al., 2002) Identifies underlying linguistic deficits in phonemic awareness, orthographic knowledge, vocabulary, morphologic knowledge and mental orthographic images Selective Auditory Attention Tests Background: Individuals with processing issues are at great risk for difficulty hearing in background noise (surrounding non-linguistic noise, group settings) Speech-in-Noise test: speech embedded in shower noise Competing Sentences Test: listen to/recall sentences in one ear and ignore sentences in other ear (binaural separation) Divided Auditory Attention Tests Background: Individuals may break down when required to share attention among different stimuli/multi-task (e.g., note-taking) The following are organized by level of difficulty: Dichotic Digits Test: recall paired digits from both ears Competing Word/Spondee tests: recall both competing words Competing Sentences Test: recall both competing Sentences Temporal Resolution Background: Individuals with phonological awareness difficulty may have an underlying difficulty of temporal resolution (though at older ages, this may have become normal but still residual phonological awareness difficulties. Random Gap Detection Test: one or two tones (separated by varying degrees of minimal gap between two tones) and indicate if heard one or two tones. Gap-in-Noise Test: Determination of the smallest gap threshold within embedded noise that an individual can detect at least 66.7% of the time. Management Techniques Does knowing the results of CAP testing inform our practice? Is there a relationship between CAP and language testing and a child’s functioning at school or home? Does therapy with children with CAPD differ from children with language impairment? General Management: Language Processing Gillam, et. al., (2002, p. 43): “… good language intervention is also good information processing intervention.” General Management Techniques: Listening Comprehension Determine purpose of listening Focus attention on topic Orient to features of the text Assess background knowledge Use graphic organizers Use text with simpler language at first Use questions/key words www. nclrc.org Listening Comprehension Make predictions Make inferences Keep writing to a minimum while listening Use visuals Teach child to monitor comprehension Teach child to ask for help www. nclrc.org Specific Management Techniques Listening in Noise Type of noise White noise, instrumental music, music with words, cafeteria noise, competing speakers, monologue (Tillery & Cinotti, 2008) Processing Power (Ferre, 1997) Increase loudness in increments Vary the complexity of the listening task Phonemic Awareness Purpose is to facilitate reading and spelling May improve working memory/lexical decoding speed Teach segmenting and blending Teach in conjunction with letters Focus should be at the phoneme level Phonemic Awareness Treatment Options Computer programs Fast ForWord & Step ForWord Earobics LocuTour Multimedia: Literacy (Gillam, 2008; Medwetsky in Geffner & Swain, 2008) Phonemic Awareness Treatment Options Structured Programs Road to the Code The Phonological Awareness KitPrimary Lindamood® Phoneme Sequencing Program Informal activities Phonemic Awareness Transfer phonemic awareness to reading and spelling Work on word decoding skills Closed Syllables Single syllables (increasing from 3 to 6 sounds), Multisyllabic Vowel-Consonant-e Syllables Open Syllables Wilson Reading System (Wilson, 1988) Phonemic Awareness Transfer phonemic awareness to reading and spelling Word Sorts by different patterns (e.g., short vowels, blends, etc.) Word Families (onset rime) Read words in sentences and paragraphs Lexical Decoding Semantic knowledge Semantic mapping Depth of word knowledge Antonym/synonyms; multiple meaning words, word definitions Strategies for learning unknown words Context cues, identify word roots Lexical Decoding Teach child to use context cues: Use series of cloze sentences Provide series of cues that progressively provide more information Example: I went to Disney World and rode_______. I went to Disney World and rode_______. It went very fast. I went to Disney World and rode sp____. It went very fast I went to Disney World and rode spa____. It went very fast. (technique adapted from Gillam & Gorman (2004) Lexical Decoding Syntax knowledge Identifying parts of speech Paraphrasing concepts Formulating sentences with key words Sentence combination tasks Scott, 1995 Lexical Decoding Word Retrieval (German, 2005) Retrieval strategies Phonetic cues, semantic cues Self Advocacy Accommodations Extended time, multiple choice exams, cue cards with key words and prompts Working Memory Phonemic awareness activities Improve language knowledge Active Listening; promote attention Strategies for older children Working Memory Memory strategies (rote) Rehearsal – chunking Mnemonics Visualizing Memory strategies (sentence/discourse level) Paraphrasing and organizing information Cues such as key questions or words, summaries or pictures Visualizing Montgomery, 2002; Gillam & Hoffman, 2004 Sequencing/Organization Narrative language Sequence events temporally and in causeeffect relationships Organize events into story grammar Story maps and flow charts Scaffolding using key questions Sequencing/Organization Narrative language Story maps, story frames, story grammar cues and story prompts (see Roth, 2000) Use oral and written narratives For older children: recognize text structure when reading to enhance reading comprehension Integration Prosody Modify prosodic aspects of input to children Higher pitch level with exaggerated variability in pitch Increased loudness Slower rate Gerken & McGregor (1998) Integration Prosody Determine meanings of words based on syllable stress Become aware of pauses corresponding to clausal boundaries * Probably one of the most important areas in processing needing research Integration Figurative Language Strategy based intervention Teach figurative expressions within a context Contrast literal to non-literal meaning Explicit teaching of contextual cues Role-playing scenarios in which the expressions can be used (Abrahamsen & Smith, 2000; Power et al., 2001; Norbury, 2005; Paul, 2007; Nippold, 1991) Integration Figurative Language Use forms in a variety of spoken and written stories Teach the communicative function of expressions Keep notebook or journal and record expressions heard; include contextual information (Abrahamsen & Smith, 2000; Power et al., 2001; Norbury, 2005; Paul, 2007; Nippold, 1991) Integration Conversation Topic initiation and maintenance Appropriate change of topic Clarification requests Clear referents Teach one aspect of conversation at a time Teach rules of conversation Use conversational/social scripts Pay attention to prosodic cues, facial expressions and body language Self-Advocacy Comprehension Monitoring Understanding learning styles: strengths and weaknesses Strategies for getting help Ask for what you need, tell someone you are having trouble Environmental Modifications/ Compensatory Strategies Modification of Listening Environment The goal is to reduce noise levels and reverberation (echoing). Examples include: carpeting, acoustically treated tiles, drapes, balls/sliders on chairs, etc. Overhead Projectors/Power Point Presentations These allow for speech-reading, increased talker loudness (projecting forward allows for increased talker intensity), while still providing for a visual reference to information at hand. Both of these techniques are better than the blackboard. For middle and high school, power point presentations allow for accompanying handouts (3 slides/page with adjacent lines to take notes), while overhead projector allows for ad-libbing. Provision of Instructions Instructions should be provided when there is little commotion (such as students preparing to leave for recess/lunch or when going home). If assignments are on the blackboard, the teacher should allow the students to write instructions down before elaborating on the assignments. For those with severe organizational skills, teacher check of agenda or provision of written homework assignments. Use of Earplugs The use of earplugs in test taking or quiet study times may allow the student to better focus on the material at hand without using mental resources to block out external stimuli. Test-Taking in a Separate Room This can minimize the amount of noise and less of a psychological need to rush in order to finish at same time as other students. Preferential Seating Sitting in the front rows (if traditional seating, 2nd row to allow for better viewing of students on side/behind when they talk) is often recommended to increase the perceived intensity of the teacher’s voice (thus, making it easier to process information). This is a good technique if the teacher never strays too far from her desk. In reality, preferential seating does not exist too often in real life. Thus, #7 is often recommended. Enhancement of the Desired Speech Signal Examples include use of assistive listening systems such as PA systems, FM sound-field & personal systems (that resemble hearing aids) and the most complex technique of all, that is, moving closer to the listener. The key aspect of assistive listening systems is that they mimic being close to the listener (i.e., decreases the distance between the talker/listener); in turn, this maintains the intensity of the talker’s voice, thus, keeping it sufficiently louder than the background noise. General Compensatory Strategies The following strategies are of benefit to individuals with processing difficulties, hearing loss, or, even second language learners, though the mechanisms by which they assist the individual differ. Modification of Talker Delivery Style Depending on the listener’s difficulty, this may include using clear speech “newscaster’s speech style, insertion of pauses, extra inflection/stress, sentences of less grammatical complexity, etc. This makes it easier for the listener to ”keep up”. Modification of Speaker Delivery Style- cont’d A conceptual formula that can guide speakers presenters is: “The more complex the material, the more important it is to slow down the overall rate in which material is presented- not by exaggerating speech patterns but by articulating words clearly, emphasizing prosodic stress patterns within speech, inserting pauses between clauses and concepts to provide additional processing time, and the use of visuals”. Familiarizing the Listener to Information Beforehand The more familiarity the listener has with the topic/content, the less they have to rely on the acoustic signal, and, the more they can use their linguistic/world knowledge to help process the incoming information. For students, this can be done by informing students/parents of the content, vocabulary, concepts prior to being covered in class (pre-viewing technique). Extended Time for Task If the individual needs additional processing time, they would likely benefit from extended time. Selfesteem issues may need to be considered/addressed. Presenting Directions/Instructions The talker can state one direction at a time and have the individual first repeat/internally visualize each direction and then summarize these directions at the end (unless too young or significant integration difficulty, may not be able to internally visualize- check if student can do it). This will ensure that the child has retained all key information; in addition, this serves as a training technique. For older students/adults, may just insert longer pauses between directions and then have them summarize at the end to ensure what processed/retained. An alternative is to highlight the sequence of steps on a blackboard/paper. Clarification of Information Presented For important directions, content, etc., the talker can check with the listener to determine if the information has been perceived correctly. For example: The talker can ask the listener to repeat instructions/ directions in their own words to ensure that the listener has indeed processed and recalled all of the information provided. If not, then the talker can fill-in the missed/forgotten information. Divided Attention Difficulties If divided attention difficulties are present, older individuals will benefit from outlines, handouts, guided notes (such as power point slides, three slides/page with adjacent lines for adding notes), and, if necessary, a designated note-taker. Phonics Difficulty If student has significant spelling difficulties present, on tests where content crucial element (rather than spelling) then spelling variance be applied. If spelling deemed crucial, then notebook computer with spell checker be provided (depends on keyboarding skills), or, availability of word bank. Assistive technology to minimize writing requirements (auto-capitalization, word predictions, punctualization) to reduce overall mental load as well as reduce spelling errors is another alternative. Writing Difficulties For older students, after having completed a written assignment, they should either read out loud to themselves what they have written or have someone else read to them (while they follow along). This may allow the student to pick up on and correct any organizational issues, spelling errors, and any punctualization errors. Individuals may also benefit from writing software that increases organization skills, such as Draft Builder and Kidspiration. Altering Class Schedule If possible, difficult subject matter is covered in the morning when the student is less likely to be fatigued. If the child is in middle/high school, avoid having two difficult subjects back-to-back. If the student’s attention seems to be drifting and appears to be becoming overloaded, listening breaks should be provided. For adults, the goal would be to arrange meetings in the morning or have handouts made available.
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