Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

125 questions · 133 findings · 17 reviews

No studies found 23 · 17.3%GRADE not reported 14 · 10.5%Very low 28 · 21.1%Low 57 · 42.9%Moderate 11 · 8.3%High 0 · 0%

Intervention not reported

Communication and language skills: expressive language Measured by: standardized measures of expressive language (higher scores indicate better expressive language skills) · patients with young children (less than six years old) with autism spectrum disorders (ASD)
1 finding from 1 review

Intervention not reported

Communication and language skills: receptive language Measured by: standardized measures of receptive language (higher scores indicate better receptive language skills) · patients with young children (less than six years old) with autism spectrum disorders (ASD)
1 finding from 1 review

Summary of findings: Picture Exchange Communication System (PECS) vs treatment

Spoken communication Measured by: frequency of speech, including non‐word vocalisations (expressed as rates per minute)a · minimally verbal children with autism spectrum disorder

It is very uncertain whether summary of findings: Picture Exchange Communication System (PECS) changes spoken communication Measured by: frequency of speech, including… compared with treatment (very low certainty).

1 finding from 1 review

Summary of findings: Picture Exchange Communication System (PECS) vs treatment

Non‐verbal communication/AAC Measured by: frequency of use of PECS symbols (expressed as rates per minute)a · minimally verbal children with autism spectrum disorder

It is very uncertain whether summary of findings: Picture Exchange Communication System (PECS) changes non‐verbal communication/AAC Measured by: frequency of use of PECS… compared with treatment (very low certainty).

1 finding from 1 review

Summary of findings: Picture Exchange Communication System (PECS) vs treatment

Combined spoken and non‐verbal communication/AAC · minimally verbal children with autism spectrum disorder

It is very uncertain whether summary of findings: Picture Exchange Communication System (PECS) changes combined spoken and non‐verbal communication/AAC Measured by: verbal… compared with treatment (very low certainty).

1 finding from 1 review

Summary of findings: Picture Exchange Communication System (PECS) vs treatment

Social communication and pragmatic language skills · minimally verbal children with autism spectrum disorder

It is very uncertain whether summary of findings: Picture Exchange Communication System (PECS) changes social communication or pragmatic language Measured by: reciprocal… compared with treatment (very low certainty).

1 finding from 1 review