Prevalence and remediation of spatial processing disorder (SPD) in Indigenous children in regional Australia

Cameron, Sharon; Dillon, Harvey; Glyde, Helen; Kanthan, Sujita; Kania, Anna

doi:10.3109/14992027.2013.871388

Cited by 45 publications

(38 citation statements)

References 17 publications

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“…The high sensitivity of a 3-minute antiphasic DIN to detect hearing loss of various types, symmetries and degrees holds significant potential for population-based screening. CHL, in the form of otitis media, is typically more prevalent among underserved, remote and poor populations than other forms of hearing loss (Hunter et al 2007;Cameron et al 2014) but is not easily detected with currently used DIN tests.…”

Section: Discussionmentioning

confidence: 99%

Improving Sensitivity of the Digits-in-Noise Test using Antiphasic Stimuli

Sousa

Swanepoel

Moore

et al. 2019

Preprint

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Objective: The digits-in-noise test (DIN) has become increasingly popular as a consumer-based method to screen for hearing loss. Current versions of all DINs either test ears monaurally or present identical stimuli binaurally (i.e., diotic noise and speech, NoSo). Unfortunately, presentation of identical stimuli to each ear inhibits detection of unilateral sensorineural hearing loss (SNHL), and neither diotic nor monaural presentation sensitively detects conductive hearing loss (CHL). Following an earlier finding of enhanced sensitivity in normally hearing listeners, this study tested the hypothesis that interaural antiphasic digit presentation (NoSπ) would improve sensitivity to hearing loss caused by unilateral or asymmetric SNHL, symmetric SNHL, or CHL. Design:This cross-sectional study, recruited adults (18-84 years) with various levels of hearing, based on a four-frequency pure tone average (PTA) at 0.5, 1, 2 and 4kHz.The study sample was comprised of listeners with normal hearing (n=41; PTA ≤ 25 dB HL in both ears), symmetric SNHL (n=57; PTA > 25 dB HL), unilateral or asymmetric SNHL (n=24; PTA > 25 dB HL in the poorer ear) and CHL (n=23; PTA > 25 dB HL and PTA air-bone gap ≥ 20 dB HL in the poorer ear). Antiphasic and diotic speech reception thresholds (SRTs) were compared using a repeated-measures design.Results: Antiphasic DIN was significantly more sensitive to all three forms of hearing loss than the diotic DIN. SRT test-retest reliability was high for all tests (ICC r > 0.89).Area under the receiver operating characteristics (ROC) curve for detection of hearing loss (> 25 dB HL) was higher for antiphasic DIN (0.94) than for diotic DIN (0.77) presentation. After correcting for age, PTA of listeners with normal hearing or symmetric SNHL was more strongly correlated with antiphasic (rpartial[96]=0.69) than diotic (rpartial=0.54) SRTs. Slope of fitted regression lines predicting SRT from PTA was significantly steeper for antiphasic than diotic DIN. For listeners with normal hearing or CHL, antiphasic SRTs were more strongly correlated with PTA (rpartial[62]=0.92) than diotic SRTs (rpartial[62]=0.64). Slope of regression line with PTA was also significantly steeper for antiphasic than diotic DIN. Severity of asymmetric hearing loss (poorer ear PTA) was unrelated to SRT. No effect of self-reported English competence on either antiphasic or diotic DIN among the mixed first-language participants was observed 3 Conclusions: Antiphasic digit presentation markedly improved the sensitivity of the DIN test to detect SNHL, either symmetric or asymmetric, while keeping test duration to a minimum by testing binaurally. In addition, the antiphasic DIN was able to detect CHL, a shortcoming of previous monaural or binaurally diotic DIN versions. The antiphasic DIN is thus a powerful tool for population-based screening. This enhanced functionality combined with smartphone delivery could make the antiphasic DIN suitable as a primary screen that is accessible to a large global audience.

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Section: Discussionmentioning

confidence: 99%

Improving Sensitivity of the Digits-in-Noise Test using Antiphasic Stimuli

Sousa

Swanepoel

Moore

et al. 2019

Preprint

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“…The relative importance of low frequency interaural timing differences (ITDs) for spatial processing benefit is in line with previous studies indicating that use of ITD cues dominates sound localization in the horizontal plane, even when all normal spatial cues are available (Macpherson and Middlebrooks, 2002). Further, because objective IPD measures are such strong predictors of spatial processing in normally hearing individuals, the AEP measure of IPD encoding may provide a useful future clinical measure in individuals suspected of having spatial or binaural temporal processing disorders (Glyde et al, 2011; Cameron et al, 2014). …”

Section: Discussionmentioning

confidence: 99%

“…However, it is important to remember that this study was exploratory in nature and thus future work is needed to confirm these results. With additional work, the AEP measure of IPD encoding may provide a useful future clinical measure in individuals suspected of having spatial processing disorders, as well as a helpful measure for studying changes in these processes across the lifespan (Glyde et al, 2011; Cameron et al, 2014). …”

Section: Discussionmentioning

confidence: 99%

Cortical Measures of Binaural Processing Predict Spatial Release from Masking Performance

Papesh

Folmer

Gallun

2017

Front. Hum. Neurosci.

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Binaural sensitivity is an important contributor to the ability to understand speech in adverse acoustical environments such as restaurants and other social gatherings. The ability to accurately report on binaural percepts is not commonly measured, however, as extensive training is required before reliable measures can be obtained. Here, we investigated the use of auditory evoked potentials (AEPs) as a rapid physiological indicator of detection of interaural phase differences (IPDs) by assessing cortical responses to 180° IPDs embedded in amplitude-modulated carrier tones. We predicted that decrements in encoding of IPDs would be evident in middle age, with further declines found with advancing age and hearing loss. Thus, participants in experiment #1 were young to middle-aged adults with relatively good hearing thresholds while participants in experiment #2 were older individuals with typical age-related hearing loss. Results revealed that while many of the participants in experiment #1 could encode IPDs in stimuli up to 1,000 Hz, few of the participants in experiment #2 had discernable responses to stimuli above 750 Hz. These results are consistent with previous studies that have found that aging and hearing loss impose frequency limits on the ability to encode interaural phase information present in the fine structure of auditory stimuli. We further hypothesized that AEP measures of binaural sensitivity would be predictive of participants' ability to benefit from spatial separation between sound sources, a phenomenon known as spatial release from masking (SRM) which depends upon binaural cues. Results indicate that not only were objective IPD measures well correlated with and predictive of behavioral SRM measures in both experiments, but that they provided much stronger predictive value than age or hearing loss. Overall, the present work shows that objective measures of the encoding of interaural phase information can be readily obtained using commonly available AEP equipment, allowing accurate determination of the degree to which binaural sensitivity has been reduced in individual listeners due to aging and/or hearing loss. In fact, objective AEP measures of interaural phase encoding are actually better predictors of SRM in speech-in-speech conditions than are age, hearing loss, or the combination of age and hearing loss.

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“…In addition, the earlier the onset and the greater the duration of otitis media, the greater the resulting deficit in spatial advantage, even though the otitis media has entirely resolved when the child is later assessed for SPD. 11,12 The condition can be reversed with deficitspecific auditory training with the LiSN & Learn software, 13 which is computer-administered in the home environment. 3,14,15 The LiSN-S and the LiSN & Learn were both developed by the National Acoustic Laboratories and have been the subject of extensive research over the past 10 years.…”

mentioning

confidence: 99%

Results from a National Central Auditory Processing Disorder Service: A Real-World Assessment of Diagnostic Practices and Remediation for Central Auditory Processing Disorder

et al. 2015

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This article describes the development and evaluation of a national service to diagnose and remediate central auditory processing disorder (CAPD). Data were gathered from 38 participating Australian Hearing centers over an 18-month period from 666 individuals age 6, 0 (years, months) to 24, 8 (median 9, 0). A total of 408 clients were diagnosed with either a spatial processing disorder (n = 130), a verbal memory deficit (n = 174), or a binaural integration deficit (n = 104). A hierarchical test protocol was used so not all children were assessed on all tests in the battery. One hundred fifty clients decided to proceed with deficit-specific training (LiSN & Learn or Memory Booster) and/or be fitted with a frequency modulation system. Families were provided with communication strategies targeted to a child's specific listening difficulties and goals. Outcomes were measured using repeat assessment of the relevant diagnostic test, as well as the Client Oriented Scale of Improvement measure and Listening Inventories for Education teacher questionnaire. Group analyses revealed significant improvements postremediation for all training/management options. Individual posttraining performance and results of outcome measures also are discussed.

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Prevalence and remediation of spatial processing disorder (SPD) in Indigenous children in regional Australia

Abstract: There is a high prevalence of SPD in the Indigenous Australian population. LiSN & Learn training is effective in remediating SPD in this population and is considered a beneficial intervention by teachers, however improvement in spatial processing is dependent on training program uptake.

Cited by 45 publications

References 17 publications

Improving Sensitivity of the Digits-in-Noise Test using Antiphasic Stimuli

Improving Sensitivity of the Digits-in-Noise Test using Antiphasic Stimuli

Cortical Measures of Binaural Processing Predict Spatial Release from Masking Performance

Results from a National Central Auditory Processing Disorder Service: A Real-World Assessment of Diagnostic Practices and Remediation for Central Auditory Processing Disorder

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