# PWR-156 — Bimanual coordination: learner worksheet Release: Revision 7T · Full Tutorial Edition Estimated time: Estimated 28 min reading and worksheet pass Difficulty: Intermediate Equipment: Basic stationery or digital tools — a simple asymmetric two-hand pattern.; Two differently coloured soft objects or target pads and an optional visual or haptic pulse.; A role sheet for left/right or hand A/hand B, transition error, role swap, missed event and fatigue. Space: Desk / seated Automated structural checklist: 10 of 10 structural checks present Evidence quality/context: G1; Detailed research depth Automated method-quality band: Comprehensive Method-rating basis: Structure coverage, instruction/check specificity, alternative distinctness, source troubleshooting, comparison depth and whether purpose/check fields are authored rather than derived. Editorial review: Pending manual editorial sign off ## Before you begin - [ ] I read the tutorial authority and stop conditions. - [ ] I have the required equipment/space or a declared accessible alternative. ## Canonical source context This lesson teaches a harmless asymmetric two-hand pattern. Each hand learns its own role, the roles are combined at a slow pace, failures are localised and one transition is repaired. It does not prescribe rehabilitation or constraint therapy. Target outcome: The learner completes a 20-second two-hand pattern in which one hand holds a steady pulse and the other performs a three-event sequence, with no role swaps on three trials. ### Authority and setup conditions - Prepare a simple asymmetric two-hand pattern using large soft objects or table taps at a comfortable pace - Before the first bimanual coordination attempt, write the exact result you will score: Role-specific coordination and chosen task success with assistance recorded. - Choose roles that are comfortable for both hands and do not restrain, force or hide either hand. - Keep the session short; clinical goals or meaningful asymmetry need a qualified therapist. ### Required or supplied materials - a simple asymmetric two-hand pattern. - Two differently coloured soft objects or target pads and an optional visual or haptic pulse. - A role sheet for left/right or hand A/hand B, transition error, role swap, missed event and fatigue. ## 1. Assign distinct roles Name hand A as pulse keeper and hand B as sequence player. Place matching colour cards beside each hand. Why: Explicit roles prevent an unnoticed swap from being counted as success. Success check: The learner can state and demonstrate each role once. Accessible alternative: Complete “Name hand A as pulse keeper and hand B as sequence player. Place matching colour cards beside each hand.” in shorter passes, or use keyboard input, dictation or a support person, while preserving this success check: “The learner can state and demonstrate each role once.” Accessible opening check for Bimanual coordination: The learner can state and demonstrate each role once. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 2. Learn hand A alone Tap a steady pulse with hand A for sixteen beats at a comfortable tempo while hand B rests naturally. Why: The timing role must be stable before a second role competes for attention. Success check: Hand A completes sixteen beats without speeding, doubling or force. Accessible alternative: Complete “Tap a steady pulse with hand A for sixteen beats at a comfortable tempo while hand B rests naturally.” in shorter passes, or use keyboard input, dictation or a support person, while preserving this success check: “Hand A completes sixteen beats without speeding, doubling or force.” Use hand-over-hand support only when consented and professionally appropriate; otherwise enlarge objects, reduce reach, use switches or substitute equivalent limb movements while keeping roles explicit. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 3. Learn hand B alone With hand A resting, perform touch–lift–slide with hand B four times, pausing after each sequence. Why: Separate practice exposes order errors in the sequence role. Success check: Hand B completes four correct sequences with comfortable grip and reach. Accessible alternative: A supported, seated, reduced-range or slower version of “With hand A resting, perform touch–lift–slide with hand B four times, pausing after each sequence.” is equivalent only when it keeps the same trained or measured target, declared configuration and success check: “Hand B completes four correct sequences with comfortable grip and reach.” If any of those change, record it as a related alternative rather than an equivalent repetition. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 4. Combine one event Keep hand A’s pulse and add only hand B’s first touch on every fourth beat. Repeat four cycles. Why: A single shared event provides a low-complexity bridge between roles. Success check: The pulse stays even and the touch lands on the fourth beat. Accessible alternative: Complete “Keep hand A’s pulse and add only hand B’s first touch on every fourth beat. Repeat four cycles.” in shorter passes, or use keyboard input, dictation or a support person, while preserving this success check: “The pulse stays even and the touch lands on the fourth beat.” Accessible opening check for Bimanual coordination: The learner can state and demonstrate each role once. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 5. Add the full sequence Insert touch–lift–slide across beats four to six while hand A continues. Work for no more than twenty seconds. Why: Short duration allows exact role coordination before fatigue. Success check: Both roles remain distinct and no event is omitted or swapped. Accessible alternative: A supported, seated, reduced-range or slower version of “Insert touch–lift–slide across beats four to six while hand A continues. Work for no more than twenty seconds.” is equivalent only when it keeps the same trained or measured target, declared configuration and success check: “Both roles remain distinct and no event is omitted or swapped.” If any of those change, record it as a related alternative rather than an equivalent repetition. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 6. Mark the failed transition If coordination breaks, stop and identify the two events immediately before and after the break for each hand. Why: A named transition is repairable; “both hands went wrong” is not. Success check: The record identifies one beat and both hand actions at the break. Accessible alternative: Complete the same research action — “If coordination breaks, stop and identify the two events immediately before and after the break for each hand.” — using speech-to-text, text-to-speech, enlarged text, keyboard-only navigation, shorter work blocks or a support person. Preserve this declared check: “The record identifies one beat and both hand actions at the break.” Do not convert the research task into capability practice. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 7. Loop then rejoin Practise only the broken two-beat transition five times, reset, then return to the full pattern once. Why: Local looping reduces repeated whole-pattern failure. Success check: The transition is correct on four of five loops and survives one full trial. Accessible alternative: A supported, seated, reduced-range or slower version of “Practise only the broken two-beat transition five times, reset, then return to the full pattern once.” is equivalent only when it keeps the same trained or measured target, declared configuration and success check: “The transition is correct on four of five loops and survives one full trial.” If any of those change, record it as a related alternative rather than an equivalent repetition. Alternative relationship: Conditional equivalence requires target and configuration check Learner notes: ________________________________________________________________________________ Completed: [ ] ## 8. Mirror only after stability After three clean trials, swap the roles of hand A and B for one slow trial. Keep the original result separate. Why: Mirroring is a new configuration and tests—not assumes—transfer. Success check: The mirrored trial is labelled separately and stopped if comfort or role clarity falls. Accessible alternative: Complete “After three clean trials, swap the roles of hand A and B for one slow trial. Keep the original result separate.” in shorter passes, or use keyboard input, dictation or a support person, while preserving this success check: “The mirrored trial is labelled separately and stopped if comfort or role clarity falls.” Use hand-over-hand support only when consented and professionally appropriate; otherwise enlarge objects, reduce reach, use switches or substitute equivalent limb movements while keeping roles explicit. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## Reflection What changed? ________________________________________________________________________________ What remains difficult? ________________________________________________________________________________ What will I repeat, adapt, ask for help with, or stop? ________________________________________________________________________________ --- Completion of this worksheet demonstrates tutorial participation only. It does not establish capability, qualification, safety clearance, diagnosis, treatment or independent validation.