Auditory Processing Disorders: Navigating the Diagnostic Maze of Central Hearing Losses.

Background

Auditory Processing Disorder (APD) manifests as impaired auditory information processing despite normal peripheral hearing. Current clinical protocols lack standardization, hampering evidence-based intervention development.

Objective

This review analyzes APD research developments from 2011 to 2025, examining diagnostic criteria, assessment protocols, and treatment effectiveness.

Methods

Medline, Embase, Scopus, and Cochrane Library databases were analyzed (January 2011-January 2025), following PRISMA guidelines. Two reviewers independently screened 413 articles, with 156 meeting inclusion criteria. Analysis included chi-square tests for intervention distribution and t-tests for diagnostic comparisons (α = 0.05).

Results

Among 156 studies analyzed, medical interventions were markedly underrepresented (n = 4) compared to rehabilitative approaches (n = 52; χ2 = 50.28, p < 0.001). The Random Gap Detection Test and Dichotic Digits Difference Test were most frequently used (12.86% and 10.48% of studies, respectively). Cognitive skill enhancement dominated intervention strategies (52.8%), followed by computer-based rehabilitation (26.4%). Publication frequency showed consistent annual growth, peaking at 57 studies in 2024. Sample sizes were comparable between APD and CAPD studies (mean difference = 4.2 cases, t = 0.416, p = 0.679). Environmental modifications appeared in 15.1% of interventions, while speech therapy was reported in only 3.8% of studies.

Conclusions

The substantial imbalance between medical and rehabilitative interventions necessitates standardized diagnostic protocols and enhanced multidisciplinary collaboration. Implementation of a hierarchical processing framework is recommended for assessment and treatment. Future research should prioritize large-scale controlled trials and unified diagnostic criteria development.