Approach-avoidance and happiness indicators in natural environments: a preliminary analysis of the Stimulus Preference Coding System.

Symons et al. (2005) built a new tool called the Stimulus Preference Coding System.

Two small groups of adults with autism or intellectual disability joined.

Staff watched each person in real places like the living room or work area.

They wrote down every time the person moved toward, moved away, or smiled.

Two different observers agreed on the codes 70 to 100 percent of the time.

The same person would approach one staff member but avoid another.

The same person would smile during one task and frown during a different task.

The tool worked, but the team never tested if it made reinforcement better.

Ellingsen et al. (2014), Shapiro et al. (2016), and Izquierdo-Gomez et al. (2015) all asked the next question.

They showed that short web lessons, self-made booklets, or brief videos can train staff to run preference checks with near-perfect skill.

These three papers extend the 2005 work: once you can code cues, you still need to teach staff to act on them.

Storch et al. (2012) used a similar watch-and-code style and found that caregiver style stayed flat across sessions, hinting that simply watching may not change staff behavior without added coaching.

You now have a free, quick sheet that turns "I think he likes this" into visible data.

Use it during any everyday activity to spot true reinforcers and to see which staff or tasks brighten client affect.

Pair the sheet with one of the proven staff-training packages so your team knows what to do after they mark the cues.