Autism & Developmental

Neural Correlates of Explicit Versus Implicit Facial Emotion Processing in ASD.

Luckhardt et al. (2017) · Journal of autism and developmental disorders 2017
★ The Verdict

Explicit emotion labeling fails to ignite early visual attention in autism, so boost input before asking for output.

✓ Read this if BCBAs teaching facial-emotion skills to autistic learners in clinic or classroom.
✗ Skip if Practitioners focused on prosody or voice-emotion work only.

01Research in Context

01

What this study did

The team wired kids with and without autism to EEG caps. They showed faces happy, sad, angry, scared.

Kids were told either to name the feeling or just watch. The researchers looked for early brain spikes that show attention kicking in.

02

What they found

Typical kids’ brains boosted early visual signals when they tried to name emotions. Autistic kids’ brains stayed flat.

The early attention spark never came online, even though they kept looking at the faces.

03

How this fits with other research

Smith et al. (2021) saw no such gap in school-aged boys. Their eye-tracker showed equal mimicry and accuracy. The clash is about automatic versus on-purpose tasks. Christina asked kids to label feelings; Stephanie just let them watch.

Georgopoulos et al. (2022) later tested adults and found only tiny accuracy drops. Their larger sample hints the brain hiccup seen here may fade with age or never hurt real-world performance.

Song et al. (2018) backs the deficit side. They showed autistic kids need stronger facial expressions to spot anger, fear, disgust. The EEG result gives a brain reason for that extra intensity need.

04

Why it matters

If early attention never switches on, don’t expect kids to pick up subtle faces in busy rooms. Give them extra cues: clearer expressions, longer looks, or labeled photos. Start teaching emotions with exaggerated faces, then fade to milder ones.

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→ Action — try this Monday

Show four feeling cards at 70 % intensity first; once the learner hits 80 % correct, drop to 40 % intensity.

02At a glance

Intervention
not applicable
Design
quasi experimental
Sample size
37
Population
autism spectrum disorder, neurotypical
Finding
negative

03Original abstract

The underlying neural mechanisms of implicit and explicit facial emotion recognition (FER) were studied in children and adolescents with autism spectrum disorder (ASD) compared to matched typically developing controls (TDC). EEG was obtained from N = 21 ASD and N = 16 TDC. Task performance, visual (P100, N170) and cognitive (late positive potential) event-related-potentials, as well as coherence were compared across groups. TDC showed a task-dependent increase and a stronger lateralization of P100 amplitude during the explicit task and task-dependent modulation of intra-hemispheric coherence in the beta band. In contrast, the ASD group showed no task dependent modulation. Results indicate disruptions in early visual processing and top-down attentional processes as contributing factors to FER deficits in ASD.

Journal of autism and developmental disorders, 2017 · doi:10.1007/s10803-017-3141-1