The electrodermal orienting response to auditive stimuli in autistic children, normal children, mentally retarded children, and child psychiatric patients.

The team tested how kids’ skin reacts to a simple beep.

They wired 24 autistic, 24 typical, 24 Down syndrome, and 24 other clinic kids to a sweat meter.

Each child heard the same 1-second tone 20 times while the machine recorded the tiny sweat blip called an orienting response.

Autistic kids often stayed flat on the first tone—no sweat bump at all.

When they did react, the bump was twice as big and vanished faster than in the other groups.

It looked like a “now you see it, now you don’t” pattern unique to autism.

Riches et al. (2016) extends this work. They swapped the plain tone for emotional music and still saw dampened skin reactions in ASD, hinting the odd response holds across sounds that carry feeling.

South et al. (2017) seems to disagree: their ASD group also showed smaller sweat spikes during a social threat. But they tracked body movement—when kids squirmed, sweat rose no matter the diagnosis. The clash fades once you see Eisler (1984) held kids still, while Mikle let them move.

Spates et al. (2013) and Russo et al. (2009) back up the idea that early auditory steps are shaky in autism, finding delayed ear-muscle reflexes and messy speech coding. Together the papers paint a picture: from ear to skin, the first milliseconds of sound often arrive warped.

If a client doesn’t jump at the first instruction, don’t assume hearing loss or defiance. Their body may simply need an extra beat to register. Try repeating the cue once, then watch for an outsized reaction and move on quickly before habituation kicks in.