Atypical lexical/semantic processing in high-functioning autism spectrum disorders without early language delay.

Kamio et al. (2007) tested automatic word meaning in adults with high-functioning autism. All had normal early language. The team used a semantic priming task. A prime word flashed, then a target word. In typical brains, related primes speed up reading.

The study asked: do autistic adults show this speed-up? No speed-up means the brain links words less automatically.

The autism group showed zero priming. Their reaction times stayed flat whether words were related or not. Controls sped up for related pairs.

Result: even without early delay, automatic semantic links were missing.

Richman et al. (2001) seems to disagree. They also ran semantic priming with high-functioning autism but found normal priming. The gap is age: M tested teens; Yoko tested adults. Priming may fade as autistic speakers grow older.

Bassett-Gunter et al. (2017) extends the story. ERPs showed autistic adults still understand meaning, but only after extra processing time. Automatic stage fails; later conscious stage catches up.

Chen et al. (2016) add brain data. fMRI showed weaker left frontal activation and more visual-area activity during word tasks. The missing priming has a neural signature.

Audras-Torrent et al. (2021) meta-analysis pulls many studies together and confirms the pattern: autistic brains light up less in classic semantic hubs.

When you give verbal cues, do not assume fast, automatic meaning. Pair spoken words with pictures, text, or signs to give extra time and routes. Break long instructions into short chunks and check each one. These steps replace the missing automatic bridge and keep learning on track.