Assessment & Research

A comparison of <scp>rate‐based</scp> and <scp>latency‐based</scp> assessments for determining demand aversiveness

Liollio et al. (2020) · Behavioral Interventions 2020
★ The Verdict

Pick latency-based demand tests for kids with frequent problem behavior and rate-based tests for kids with rare behavior to finish faster.

✓ Read this if BCBAs who build demand hierarchies in school or clinic settings.
✗ Skip if Clinicians only running preference or SIB-reduction protocols.

01Research in Context

01

What this study did

Liollio and team compared two ways to rank how hard kids find school tasks.

They worked with three children who have intellectual disability.

One method counted how many times a child tried to leave the table.

The other timed how long the child stayed before the first try to leave.

02

What they found

The two methods did not always give the same task order.

When problem behavior happened a lot, the timing method finished faster.

When problem behavior was rare, the counting method was quicker.

03

How this fits with other research

Perrin et al. (2018) warned that timing alone can be too sensitive during treatment.

They saw timing give jumpy data when kids hit themselves hard.

Imler et al. (2024) later showed timing also speeds up stimulus choice tests.

Together the three papers say: use timing to save minutes, but keep an eye on data stability.

04

Why it matters

You can now pick the faster test before you even start.

If the child hits, bites, or bolts often, start with latency.

If behavior is rare, stick with rate.

Either way you still get a clear work list without wasting session time.

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→ Action — try this Monday

Watch your client for five minutes: if you see three or more escape tries, switch to a latency assessment next session.

02At a glance

Intervention
functional behavior assessment
Design
single case other
Sample size
3
Population
intellectual disability
Finding
mixed

03Original abstract

Demand assessments are used to determine the relative aversiveness of demands. This study compared two demand assessments (i.e., rate‐based and latency‐based) proposed in past research with three children with intellectual and developmental disabilities. We compared the hierarchical outcomes of demand aversiveness and efficiency of the two assessments. Differing degrees of correspondence between the assessments was found across participants. The latency‐based measure was most efficient for a participant with high‐rates of problem behavior. The rate‐based assessment was more efficient for a participant with low‐rates of problem behavior. More research is needed to determine when the different assessments should be conducted.

Behavioral Interventions, 2020 · doi:10.1002/bin.1720