# VPSM Implementation Verification Checklist

## ✅ Core Files Created

### Screens (6 total)
- [x] `src/components/screens/VPSM/IntroScreen.jsx`
- [x] `src/components/screens/VPSM/PracticeInstructionsScreen.jsx`
- [x] `src/components/screens/VPSM/PracticeScreen.jsx`
- [x] `src/components/screens/VPSM/PracticeCompleteScreen.jsx`
- [x] `src/components/screens/VPSM/MainTestScreen.jsx`
- [x] `src/components/screens/VPSM/ResultsScreen.jsx`
- [x] `src/components/screens/VPSM/SternbergTask.jsx` (orchestrator)

### Shared Components
- [x] `src/components/shared/VPSM/FixationCross.jsx`
- [x] `src/components/shared/VPSM/MemorySetDisplay.jsx`
- [x] `src/components/shared/VPSM/ProbeDisplay.jsx`
- [x] `src/components/shared/VPSM/ResponseButtons.jsx`
- [x] `src/components/shared/VPSM/FeedbackDisplay.jsx`
- [x] `src/components/shared/VPSM/TrialCounter.jsx`
- [x] `src/components/shared/VPSM/MetricsCard.jsx`

### Hooks
- [x] `src/hooks/vpsm/usePracticeScreen.js`
- [x] `src/hooks/vpsm/useMainTestScreen.js`

### Utilities
- [x] `src/utils/vpsmTimer.js`
- [x] `src/utils/vpsmCalculations.js`
- [x] `src/utils/vpsmDataExport.js`

### Constants
- [x] `src/constants/vpsmConfig.js`
- [x] `src/constants/vpsmInstructions.js`
- [x] `src/constants/vpsmTrialSequences.js`
- [x] `src/constants/vpsmMainTrials.js`

### Routing
- [x] Added `/vpsm/intro` route to `App.jsx`

---

## ✅ Research Protocol Compliance

### Trial Structure
- [x] Practice: 20 probes (adolescent) / 25 probes (adult)
- [x] Main task: 650 probes (adolescent) / 800 probes (adult)
- [x] 15 memory sets across 5 triads
- [x] Alternating spans: 1→3→5 (adolescent) / 2→4→6 (adult)
- [x] Exact probe sequences from PDF (not randomized)

### Timing (milliseconds)
- [x] Fixation cross: 300ms
- [x] Memory item display: 1100ms (adolescent) / 1300ms (adult)
- [x] Retention interval: 1000ms
- [x] Probe window: 6000ms (adolescent) / 4500ms (adult)
- [x] Feedback (practice): 1000ms (correct) / 1500ms (incorrect) / 1000ms (timeout)
- [x] Timeout message: 1000ms
- [x] Inter-trial interval: 300ms

### Presentation Rules
- [x] Memory items shown ONE AT A TIME (sequential, never simultaneous)
- [x] Items centered, large font (text-6xl), white on black
- [x] Fixation cross (+) between trials
- [x] 1-second blank retention interval after encoding
- [x] Probes displayed with Yes/No buttons

### Response Handling
- [x] Two buttons: "Yes" and "No"
- [x] Light blue border (ring-4 ring-blue-400) on selection
- [x] Keyboard shortcuts: Y = Yes, N = No
- [x] Accept only first response (prevent double-clicks)
- [x] Timeout shows "Time is up!" for 1 second
- [x] Timeouts recorded as: accuracy=0, RT=null, response="No Response"

### Feedback Rules
- [x] Practice: Feedback after EVERY probe
  - Correct: "Correct! You remembered it right." (1s)
  - Incorrect: "That's okay—try to remember the set carefully." (1.5s)
  - Timeout: "Please press your choice quickly!" (1s)
- [x] Main test: NO feedback (except timeout message)
- [x] Main test: Light blue border is ONLY visual confirmation

### Data Collection
- [x] Every probe trial recorded with all required fields
- [x] Trial number, memory set, span size, probe, type
- [x] Participant response, accuracy (0/1), reaction time (ms or null)
- [x] Timestamp for each trial

### Calculations (Per Research Protocol)
- [x] Overall accuracy: (correct / total trials) × 100
- [x] Span-specific accuracy for each span size
- [x] Mean RT calculated ONLY from correct responses
- [x] Timeouts excluded from RT calculations
- [x] Span-specific mean RTs
- [x] Working memory capacity: Highest span with ≥75% accuracy
- [x] RT slope: (RT_large - RT_small) / (span_large - span_small)
- [x] Response bias: % of "Yes" responses (should be ~50%)
- [x] Timeout rate: % of trials with no response

### Data Export
- [x] JSON export with full metadata and trial data
- [x] CSV export with columns matching PDF scoring manual:
  - Round Number, Memory Set Size, Probe Item, Probe Type
  - Participant Response, Response Accuracy, Reaction Time (ms)

---

## ✅ UI/UX Requirements

### Design
- [x] Black background throughout entire test
- [x] White text, high contrast
- [x] Responsive: 345px to large screens
- [x] Clean, professional, modern design (per user memory)
- [x] Minimal animations during encoding/probe phases
- [x] Age-appropriate language (casual for adolescents, formal for adults)

### Visual Elements
- [x] Centered stimuli with large readable fonts
- [x] Clear Yes/No buttons at bottom
- [x] Progress tracking (probe count, memory set, triad)
- [x] Span size indicator
- [x] Probe type display (Positive/Negative)
- [x] Current memory set shown in header

---

## ✅ Verification Test Results

### Trial Counts
- Adolescent practice: 20 ✓
- Adult practice: 25 ✓
- Adolescent main: 650 ✓
- Adult main: 800 ✓

### Probe Distribution
- Adolescent span 1: 150 trials (5 sets × 30) ✓
- Adolescent span 3: 250 trials (5 sets × 50) ✓
- Adolescent span 5: 250 trials (5 sets × 50) ✓
- Adult span 2: 150 trials (5 sets × 30) ✓
- Adult span 4: 325 trials (5 sets × 65) ✓
- Adult span 6: 325 trials (5 sets × 65) ✓

### Probe Type Balance
- Adolescent: 50.0% Positive / 50.0% Negative ✓
- Adult: 51.1% Positive / 48.9% Negative ✓

### Timing Verification
- All timing constants match protocol specifications ✓
- Sequential item display logic implemented correctly ✓
- Retention interval properly enforced ✓

### Calculation Logic
- Accuracy calculations verified ✓
- RT calculations (correct responses only) verified ✓
- Capacity estimation algorithm verified ✓
- RT slope calculation verified ✓
- Interpretation functions working ✓

---

## 🎯 Ready for Testing

The complete Sternberg Working Memory Paradigm implementation is:
- ✅ Fully compliant with research protocol
- ✅ All 6 screens implemented
- ✅ All shared components created
- ✅ State management hooks working
- ✅ Data collection and export ready
- ✅ Performance calculations accurate
- ✅ UI/UX aligned with user preferences
- ✅ No linter errors

**Next Step**: Test user flow through both age cohorts to verify transitions and data persistence.
