B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
19%
19% -- sales performance improvement for core performers (middle 60% of sales force) (2025)
Best-quality coaching can improve performance by up to 19% for core performers (the middle 60% of the sales force).
- Applies specifically to best-quality coaching
- Improvement is up to 19%
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
19%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Harvard Business Review
Primary
Tier C
https://www.numentum.com/articles/master-these-two-types-of-sales-coaching ↗
Source Article
Need higher performing sellers? Master these two types of sales coaching — Numentum
Need higher performing sellers? Master these two types of sales coaching
The most successful leaders—in both team satisfaction and performance—prioritize coaching.
Coaching is easy to appreciate but harder to prioritize, especially towards quarter end when the pressure to close deals reaches its pea…
Original Research
Harvard Business Review
· Original study ↗
Methodology
Quoted from Harvard Business Review research on sales coaching
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
core performers (middle 60% of sales force): 19% sales performance improvement. Source: Harvard Business Review (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/coaching-core-performers-19-percent
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<blockquote cite="https://lighthousedata.io/data/coaching-core-performers-19-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>19%</strong> -- sales performance improvement for core performers (middle 60% of sales force)<br><small>Source: Harvard Business Review (2025) · <a href="https://lighthousedata.io/data/coaching-core-performers-19-percent" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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