MSWO

Multiple Stimulus Without Replacement

ABA Preference Assessment · Trial tracking · Session summaries and export

1. Assessment Setup

Learner / Child Name *

Learner ID

Date *

Teacher / Therapist *

Organization / Center

Number of Items

Sessions planned

Pre-session sampling

Access duration

Selection instruction

Randomize initial item positions Rotate remaining items (leftmost to right)

Assessment notes

MSWO rule: once selected, an item is removed from the active array for the rest of that session. All items return at the start of a new session.

2. Stimulus Items

Optional images are loaded from your device and remain local to this browser session.

3. Pre-Session Sampling

Sampling not startedItem 1

Optionally allow the learner to briefly sample each item before beginning the assessment.

00:10

4. Assessment Session

1 / 3Session

0Selections this session

5Items remaining

Pick one.

Complete setup and begin a session.

If the learner stops selecting, follow the assessment protocol and record the event. The tool does not treat refusal as an item selection.

5. Trial Data

Session / Trial	Items Available	Selected	Position	Engagement sec	Observed	Notes	Action

6. Results Summary

0Sessions with data

0Selections recorded

5Stimuli

Summed Trial Numbers

Lower sums indicate earlier selection and relatively higher observed preference. Unselected items are shown separately.

Item	Selection order by session	Summed trial #	Mean engagement sec	Category

Assessment Report

Complete one or more sessions to generate the report.

Privacy: data stays in this browser and is not uploaded. Secure exported files. Preference results describe observed choices and do not independently establish reinforcer effectiveness.