The moment a new score lands on the piano stand, two instincts collide. One pushes toward the original tempo, urgent and forward. The other freezes the hand at every wrong note. The same collision plays out on a recital stage and at a student's first lesson, and it shapes the next six months of progress more than almost any other choice.
If practice time is finite, where should that time go first? Intuition says "both at once." The motor-learning literature and the music cognition research that builds on it disagree consistently and clearly. Accuracy and speed in sight-reading do not develop on the same timeline — and the order matters.
The Counterintuitive Result — Accuracy First
When fast-but-error-prone playing becomes a habit, slowing down later to repair accuracy is harder than learning accurately from the start. The classic statement of this principle comes from Schmidt and Bjork in their 1992 paper in Psychological Science.
Their finding cuts directly against the most popular instinct in self-directed practice. Faster performance during practice can look like progress in the moment, but it does not reliably translate to long-term retention, transfer, or generalization (Schmidt & Bjork, 1992). The paper draws a sharp distinction between performance (how fast the hands move right now) and learning (whether those movements survive a week later in a new piece).
Sight-reading sits firmly on the learning side. The capacity to translate a never-before-seen score into finger motion comes from accumulated, accurate encounters with patterns across many pieces — not from one piece pushed fast.
What the Learning Curve Tells Us About Time Allocation
Time invested in accuracy early arrives back as speed automatically. The pattern is not unique to music. It governs motor and cognitive learning across domains, from industrial production curves to surgical skill acquisition. Two seconds per note at 95% accuracy in the first ten sessions becomes one second per note at 95% accuracy after thirty sessions of the same piece, with almost no extra time spent chasing tempo. The reverse path — starting at one second per note with 70% accuracy — embeds the wrong fingerings into motor memory, and the cost of repair compounds. Each additional pass with an error reinforces the error, not the correction. By the time the learner recognizes the problem, the unlearning often takes longer than the original time saved.
Putting the Principle to Work — Three Stages
The most useful translation of this principle into daily practice splits a piece into three windows.
Stage 1 — 100% Accuracy First (First 5–10 Repetitions)
The first encounter with a new score. Set the metronome to the slowest tempo at which every note can be played correctly. The point is not to learn the piece yet; it is to keep wrong fingerings from entering motor memory in the first place.
Stage 2 — Gradual Speed Increase (Hold 95% Accuracy)
Move the same passage upward in tempo by 5–10 BPM increments while maintaining at least 95% accuracy. The moment accuracy drops below that threshold, drop back one step. What music cognition research consistently calls automaticity is not a fast hand — it is a hand that stays accurate without conscious supervision.
Stage 3 — Target Tempo Plus Expression (Hold 90% Accuracy)
Once the target tempo is reached, accuracy can yield slightly, down to about 90%. This is when dynamics, articulation, and phrasing enter. If expression starts to destabilize accuracy, briefly return to Stage 1 or 2 and rebuild the foundation.
Timing Accuracy Is a Separate Track
A useful distinction lives inside the word "accuracy." In music it splits into two: pitch accuracy (which key is pressed) and timing accuracy (when it is pressed). The fingering accuracy described above is the priority in Stage 1, but timing accuracy is a separate motor-learning domain with its own dynamics.
Bruno Repp's 2005 review in Psychonomic Bulletin & Review surveyed the tapping and timing literature in music performance. Musicians' timing accuracy is approximately twice as precise as that of non-musicians, but that precision degrades at higher tempos, and pitch accuracy and timing accuracy do not grow at the same rate (Repp, 2005). Treating them as one variable is a common reason for stalled progress at intermediate levels.
Back to That New Score
Return to the first moment with a new score. "Original tempo pressure" is, by itself, an obstacle to learning. The first five to ten passes belong to 100% accuracy at one notch below the metronome's comfortable speed. Speed enters gradually. Expression lands last.
Intuition insists that "fast and frequent makes fast." The motor-learning evidence reverses the rule: accurate and slow makes fast — fast and inaccurate makes inaccuracy permanent. The most common stall point for a sight-reading learner sits at exactly this corner. Reordering time allocation, without adding minutes, can change a six-month outcome.