AFLS vs VB-MAPP: Picking the Right Skill Assessment for Your Learner

Pick the VB-MAPP when your learner looks like Mark Malady's kindergarten case, an early learner whose milestone is starting school, and pick the AFLS when your learner looks like his pet-care case, an older learner whose milestone is doing a real-life routine on their own. The two tools share a shelf but they answer different questions. The VB-MAPP asks "what verbal and learning skills are in place," and the AFLS asks "can this person run the routines of daily life." Once you treat the goal as the input, the choice gets a lot less foggy.

AFLS vs VB-MAPP at a glance#

The VB-MAPP, short for Verbal Behavior Milestones Assessment and Placement Program, was built for early learners. It maps language, social, and learning-readiness skills up to about a 48-month developmental level. The AFLS, short for Assessment of Functional Living Skills, was built for people working on independent living. It covers home, school, community, and vocational routines, and it does not cap at an early-childhood ceiling.

That gap matters when you are deciding which one to run. A BCBA, a Board Certified Behavior Analyst, who only carries the VB-MAPP into a session with a 16-year-old learner will end up with a report full of mastered checkboxes and not much to teach. A BCBA who only carries the AFLS into a session with a 3-year-old will skip past the verbal and learning skills that need to come first.

Malady puts the honesty problem on the table early. Most BCBAs reach for the VB-MAPP first because funders pay for it, not because the research supports it the strongest.

When we get into some of our other instruments, usually standardized instruments... we start to see stronger levels of support... we almost have an inverse relationship happening. We're emerging or weak instruments in the validity and reliability actually are getting utilized at a higher rate than the instruments that have strong or very strong support. From the talk — Mark Malady

Read that as a permission slip. You are allowed to pair tools, swap tools, or skip tools when the goal calls for it.

Who VB-MAPP is built for and where it stops#

The VB-MAPP fits early learners. Think ages roughly 0 to 4 developmental, with a strong focus on mand, tact, listener response, intraverbal, social, and group-instruction skills. It is also good at spotting the small barriers that block teaching, like escape behavior or weak imitation.

Where it stops is the ceiling. The top milestones land near a 48-month profile. Malady walks through the math on this, including how the ABLLS-R, another common assessment, runs into a similar problem.

We can look at only up to H5 for ABLA's and the VBMAP. Although the ABLA's claims go up to 12, there's a lot of disagreement on how that differentiation actually plays out across people. From the talk — Mark Malady

So if your learner is 7, 12, or 25, and they pass most of the VB-MAPP, you have not "graduated" them. You have outgrown the tool. The next step is a real-life goal assessment, and that is where the AFLS earns its keep.

Use the VB-MAPP when:

• The learner is under 6 and has emerging language.
• The IEP or treatment plan is still anchored in early learner targets.
• You need a fast read on barriers that block teaching.

Who AFLS is built for and where it shines#

The AFLS is six separate modules. Basic Living, Home, Community Participation, School, Independent Living, and Vocational. You only run the modules that match the learner's goal. That modular shape is what makes it work for a 9-year-old learning to ride a bus and a 32-year-old learning to manage a checkbook.

It shines when the family or learner can name a specific milestone in plain language. Cook a meal. Cross a street. Use a phone. Hold a job. Take care of a pet. Malady shows two cases that map almost too cleanly to the AFLS vs VB-MAPP split.

Here we have an example of a person who was trying to start kindergarten and it was really important to the family that they tried to start kindergarten... Another example of a person who wanted to take care of a pet and the family was very concerned. The person didn't have the skills to take care of the pet. From the talk — Mark Malady

The kindergarten case is a VB-MAPP case. Group instruction, listener response, sitting and attending, requesting help. The pet case is an AFLS case. Feed on a schedule, refill water, notice signs of distress, follow a routine. Same learner type does not mean same assessment.

Use the AFLS when:

• The goal is a daily-life routine, not a developmental milestone.
• The learner is over 6 or has already hit the VB-MAPP ceiling.
• The family can describe what "success" looks like in plain words.

How to use both together in one case#

Running both is not "covering your bases." It is following the actual research recommendation. The 2025 CASP and APBA guidelines that Malady walks through say one tool will not fit one learner across a real treatment plan.

A big recommendation of the guidelines is that to this point, they have not seen single instruments that can fit the need across learners. And they're really they're recommending that we are not using single modal approaches. From the talk — Mark Malady

A clean way to pair them:

1. Start with a 30 to 45 minute caregiver and learner interview. Ask what the milestone is. Ask what the learner cares about. Ask what the family is worried about.
2. If the milestone is a developmental one (kindergarten, daycare, early peer play), the VB-MAPP carries most of the report. The AFLS, especially the Basic Living module, fills in the daily-routine gaps.
3. If the milestone is a life-routine one (pet care, job, apartment), the AFLS carries the report. The VB-MAPP only comes in if the engage interview turns up a real barrier in listener or verbal response.
4. Document why you picked each tool in your selection rationale. Funders read these now.

The interview-then-select pattern protects you from "I always run the VB-MAPP" autopilot. That autopilot is the single biggest reason pet-care goals end up with kindergarten programs and vice versa.

Red flags that mean you picked the wrong tool#

A few signs the assessment package does not fit the learner:

• Every item is mastered. If the VB-MAPP is mostly checks, the tool is too small for the learner. Move to AFLS or supplement with a real-life routine.
• Every item is at zero. The entry point is too high. Either drop to a more basic assessment, like the ABLLS-R for verbal-behavior basics, or step down inside the AFLS to Basic Living.
• The report does not match the goal. If the family said "we want a job" and the report is full of tact and mand data, the wrong tool was on the table.
• The team scores 100 percent and only the learner does not. Malady flags this as a breadth problem. If the average aide and parent would pass every item, your skill bar is set at compliance, not life.
• The learner shuts down during the session. Cold probing through items that are too hard is not a measurement choice, it is a setup error. The wrong tool, run cold, feels like a test.

What to write in the assessment report so funders approve it#

Funders approve assessments when the report tells a story they can follow. The CASP guidelines reward this. Three things to put on the page:

First, name the tools and say why. One short paragraph each. Something like "We ran the VB-MAPP because the learner is 4 and the family's goal is kindergarten readiness. We ran the AFLS Basic Living module because the family also wants morning and bedtime routines done without prompts."

Second, show selection logic with the interview. A line like "During the 35-minute caregiver and learner interview, the family identified two milestones. The interview informed the modules we selected." Funders want to see that the assessment was tailored, not stamped.

Third, show the gap and the bridge. Use the VB-MAPP and AFLS scores to point at the specific items that block the milestone, and propose the program that closes the gap. Funders are not buying tests, they are buying treatment that maps to a goal.

If the funder pushes back on running both, Malady's tip is to send them the research bar. Most insurers have an internal policy that says one validity study and one reliability study makes a tool acceptable. Send the citations with the request and ask for the written policy. Most pushback ends there.

Frequently asked questions#

Can I bill for AFLS and VB-MAPP in the same authorization?

In most commercial plans, yes, if you justify each one. The cleanest way is to list the milestones in the treatment plan, attach the matching assessment to each milestone, and submit one assessment authorization with both tools named. If the plan denies, ask for the written policy that defines acceptable assessment instruments. Most accept one validity study and one reliability study. Both tools clear that bar.

Which is better for a teenager I just inherited from another clinic?

Neither, alone. Start with a 30 to 45 minute engage interview with the teen and a caregiver. Ask what the teen wants their week to look like in 12 months. If the answers are about school, friends, and class participation, run the VB-MAPP only if there are real verbal-behavior gaps, and pair with AFLS School and Community modules. If the answers are about a job, a license, or moving out, the VB-MAPP is probably the wrong tool. Lead with AFLS Vocational, Independent Living, and Community.

Does AFLS replace VB-MAPP once a learner hits the ceiling?

For most learners with a life-routine goal, yes. The VB-MAPP has done its job once an early learner has cleared its top milestones. From that point on, the program should be measured against the real-life things the learner is trying to do. The AFLS is built to measure that. The one exception is if a verbal-behavior barrier shows up later, like loss of mand under stress. Then a targeted VB-MAPP rerun on the relevant section is fair game.

Watch the full talk#

Mark Malady walks through both tools alongside the 2025 CASP and APBA assessment guidelines, the recent validity and reliability data on the VB-MAPP and AFLS, and the engage interview format that drives tool selection. He also shows the kindergarten case and the pet-care case as full skill-gram reports, which the article only summarizes. The recording is one BACB CEU and runs about an hour. Watch the full talk →