Task Analysis in ABA: Breaking a Skill Into Teachable Steps

A task analysis is a skill cut into steps small enough to teach and score one at a time. Handwashing becomes eight steps. Packing a school bag becomes six. The learner stops being someone who "can't do the morning routine" and becomes someone who does eleven of thirteen steps independently and needs help with two.

That reframe is most of the value. The other part is that it tells you exactly where to teach.

The build order is short:

1. Do the routine yourself and write down what you actually did, in that setting, in that order
2. Baseline it: ask the learner to do the whole chain once, prompting only to keep it moving, and score every step
3. Split the steps they stall on, merge the ones they already run together
4. Pick a chaining method: forward, backward, or total task
5. Score prompt level per step, not pass or fail
6. Stop changing the step list once teaching begins, or the data cannot be compared

You can build and print the sheet for any routine from the free Task Analysis Data Sheet, with your own steps on it rather than a stock list.

Write the steps for this learner, in this house

The most common failure is a downloaded step list. Generic task analyses read plausibly and then fall apart, because the sequence in the document is not the sequence in the room.

A real handwashing chain depends on whether the tap is a lever or two separate handles, whether the soap is a pump or a bar, and whether the towel is on a hook the learner can reach. Get any of those wrong and the learner fails a step that does not exist in their bathroom. The same goes for the pictures: the hand washing visual schedule is a starting sequence from the sink to drying off, and any picture in it can be swapped for a photo of the learner's own tap, soap and towel.

So write the list by doing the routine in the actual setting. It takes four minutes and it is the difference between a sheet that works and a sheet that gets abandoned.

Make every step observable

Each step should be an action a second person could score the same way without asking you what you meant.

Written poorly	Written well	Why
Get ready to wash hands	Walk to the sink	Observable, single action
Wash properly	Rub palms together for five seconds	Scorable, has a stated standard
Clean up	Put the towel on the hook	One action, clear endpoint
Turn on water and wet hands	Turn on the water / Put hands under the water	Two actions need two steps

The bundled-step problem in the last row is the sneaky one. When a step contains two actions, a learner can do one and not the other, and whoever is scoring has to guess. Two staff guessing differently is how a program produces data that says nothing.

A quick test: hand the list to someone who has never met the learner and ask if they could score a session from it without asking you a single question.

How many steps is right

There is no correct length, and two task analyses of the same skill can honestly differ. The number of steps is a property of the learner.

• Split any step where the learner reliably stalls. If "put on the shirt" fails every time, it is probably three steps: gather the hem, head through the neck hole, one arm then the other.
• Merge steps the learner already performs as one motion. Listing them separately adds scoring work and shows no useful detail.

This is also why the baseline matters. Watching the learner attempt the whole chain once, before any teaching, usually reveals that the routine is not the problem: two or three specific steps are, and the rest are already there.

Choosing a chaining method

Forward chaining teaches step one to mastery while prompting the rest, then step two, and onward. It suits routines where the early steps are the hard ones, and it gives a clear teaching focus each session.

Backward chaining teaches the last step first, prompting everything before it, then works backward. Its advantage is that the learner completes the routine on every attempt from day one and contacts whatever naturally reinforces it at the end, which matters for chains that end in something the learner wants.

Total task presentation runs every step every time with prompting as needed. It suits learners who can already do part of the chain and need practice across the whole sequence rather than isolated drilling.

None of the three is better in general. Backward chaining is often the right first choice for self-care routines whose payoff sits at the end, and total task is often right when a baseline shows the learner already has most of the steps.

Record prompt level, not pass or fail

Scoring each step as done or not done throws away most of the information. A learner who needed hand-over-hand help on step four last month and now needs only a gesture has made real progress, and a yes or no column shows none of it.

Record the level of help instead: independent, verbal, gestural, model, partial physical, full physical. That is what makes a plateau readable, because a chain stuck at 60 percent independent looks flat until you notice the prompts behind those steps have moved two levels.

The Prompt Level Data Sheet records the fading side directly if prompt level is the dimension the goal names. Which measurement fits which goal is covered in ABA data collection methods compared.

Stop editing the list once teaching starts

Task analyses get quietly revised. A step gets reworded, two get merged, someone adds one that was always assumed. Each edit is reasonable and the cumulative effect is that this month's 70 percent cannot be compared with last month's 55 percent, because the denominator changed.

Get the list right during baseline, then freeze it. If it genuinely has to change, mark the date and treat the following sessions as a new baseline rather than a continuation.

Where the printable sheets live

Task analysis sits alongside the other measurement systems on the ABA therapy resources hub, all free to build and print with no account. If the routine also needs a visual for the learner rather than a scoring sheet for the adult, the Visual Schedule Creator turns the same step list into pictures, and the Routine Builder adds timing and transition warnings. For a home routine that has already been broken into steps, the Home Organization Task Boxes print five four-step routines, sheets, plants, the bathroom counter, as cut-apart cards a learner sequences onto a numbered mat, which is total task presentation in a box. A seasonal outdoor chore breaks down the same way: Fall Yard and Porch Chores prints raking leaves and porch cleanup as six-step chains, each with a look-and-decide step for the judgment call and a self-check strip, and its free raking sample is one full routine as it prints. Holiday routines break down the same way for younger learners: Christmas Sequencing Cards print each routine, from decorating the tree to making a card, as picture cards with a short sentence that a child cuts apart and orders on a strip, with a shorter, gentler version of each. In November the same breakdown fits Thanksgiving sequencing activities, where setting the table runs tablecloth, plates, napkins and then dinner, and each step leaves something the next card needs. The same frozen-list principle runs through three daily routine packs. The Morning Routine, Alarm to Door is a nine-step chain with a data sheet that scores every step across five dated columns, and its free morning routine checklist is the chain as it prints. Bedroom and Personal Space Routines keeps its bed-making chain at six steps and puts the fold on an extension card outside the numbered list, so adding it later does not change the denominator; the free make your bed sample is the chain and its three-point check. Pet Care Routines runs feeding and walking as chains that end on handwashing, a last step many learners already have, which lets a backward chain finish independently from the first session, and the free dog feeding sample is one full routine. All three chains, with the hygiene, cleaning and laundry and weather dressing packs written the same way, one action to a step, are the six packs in the Daily Living Routines Bundle.

If a family is running the routine at home between sessions, the step list should go with them: ABA parent training handouts covers what makes a handout a caregiver can actually follow.