Communicative function taught (behavioral regulation, joint attention, social interaction, or multiple) does not statistically moderate AAC effects¶

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? For AAC-related outcomes, average Tau did not differ significantly by communicative function (model A F(3,12.8) = 1.3, p = 0.305). → Ganz 2022 q3 i? Average LRR also did not differ significantly by communicative function (model A F(3,10.0) = 2.6, p = 0.111). → 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 meta-regression on the AAC-related subsample across behavioral regulation (k = 49), joint attention (k = 13), social interaction (k = 7), and multiple functions (k = 6). Descriptively, multiple functions and social interaction were larger, but there were "no statistically distinct differences in average effects by communication function".

"When based on the Tau ES metric, there were no statistically distinct differences in average effects by communication function"

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 meta-regression on the same subsample: multiple functions had the largest estimates (e.g., LRR = 2.383 in model A), followed by behavioral regulation (2.207), with joint attention and social interaction smaller, but "no statistically distinct differences in average effects by communication function".

"Using the LRR metric, there were again no statistically distinct differences in average effects by communication function"

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
• AAC intervention research overwhelmingly targets behavior regulation and communication production, neglecting joint attention, social interaction, and comprehension — related
• The number of communication modes used during intervention does not statistically moderate AAC treatment effects — related
• Aided versus unaided AAC does not statistically moderate AAC effects, though exclusive aided AAC descriptively yields the largest estimates — related
• Under-reported participant characteristics and implementation factors, plus effect-size metric limitations, explain the scarcity of significant moderator differences — related