Aided versus unaided AAC does not statistically moderate AAC effects, though exclusive aided AAC descriptively yields the largest estimates¶

Claim · All claims
Evidence · 1 study (2 entries) · quant-synthesis r3 · q3
Currency · newest study 2022 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Tau differences among exclusively aided, exclusively unaided, and combined AAC were not statistically distinguishable in any model (model A F(2,16.0) = 1.4, p = 0.275). → Ganz 2022 q3 i? LRR differences among the same categories were also not statistically distinguishable in any model (model A F(2,12.0) = 0.7, p = 0.527). → Ganz 2022 (2)

Evidence¶

Ganz 2022¶

Ganz, J. B., Pustejovsky, J. E., Reichle, J., Vannest, K. J., Foster, M., Fuller, M. C., Pierson, L. M., Wattanawongwan, S., Bernal, A. J., Chen, M., Haas, A. N., Skov, R., Smith, S. D., & Yllades, V. (2022). Augmentative and Alternative Communication Intervention Targets for School-Aged Participants with ASD and ID: a Single-Case Systematic Review and Meta-analysis. Review Journal of Autism and Developmental Disorders. doi:10.1007/s40489-022-00326-6

q3 · i? · quant-synthesis · r3

Tau analysis of the AAC-related subsample: exclusively aided AAC had the largest estimates (0.801 in model A), exclusively unaided the smallest (0.619), but "these differences were not statistically distinguishable in any of the three models".

"Although there seem to be differences across these categories, these differences were not statistically distinguishable in any of the three models."

Ganz 2022 (2)¶

Ganz, J. B., Pustejovsky, J. E., Reichle, J., Vannest, K. J., Foster, M., Fuller, M. C., Pierson, L. M., Wattanawongwan, S., Bernal, A. J., Chen, M., Haas, A. N., Skov, R., Smith, S. D., & Yllades, V. (2022). Augmentative and Alternative Communication Intervention Targets for School-Aged Participants with ASD and ID: a Single-Case Systematic Review and Meta-analysis. Review Journal of Autism and Developmental Disorders. doi:10.1007/s40489-022-00326-6

q3 · i? · quant-synthesis · r3

LRR analysis of the same moderator: exclusively aided AAC had larger average estimates (2.151 in model A) than other combinations, but "differences in average LRR effects were not statistically distinguishable in any of the models".

"Similarly, differences in average LRR effects were not statistically distinguishable in any of the models"

Discussion¶

Related Claims¶

• AAC interventions yield moderately large average effects on communication outcomes for school-aged participants with ASD and/or ID, with substantial between-study heterogeneity — related
• Type of communication mode shows only a marginal, non-robust moderation of AAC effects, with aided AAC descriptively outperforming manual signs/gestures — related
• Under-reported participant characteristics and implementation factors, plus effect-size metric limitations, explain the scarcity of significant moderator differences — related
• Communicative function taught (behavioral regulation, joint attention, social interaction, or multiple) does not statistically moderate AAC effects — related
• The number of communication modes used during intervention does not statistically moderate AAC treatment effects — related