consultants.coach: newly verified entrieshttps://consultants.coach/The research consultant-coaches need, verified against its sources and graded for strength of evidence. Free and open.enCC BY 4.0 · Maturity.CoachWorkplace coaching meta-analysis: positive effects overall; the largest effects rest on very few studieshttps://consultants.coach/research/r-0002/https://consultants.coach/research/r-0002/Sun, 25 Oct 2026 00:00:00 -0400A meta-analysis of 17 workplace coaching studies (2,267 people) finds a positive overall effect (δ = 0.36), larger without multisource feedback and with internal coaches, but the biggest effects come from subgroups of only three studies.A stronger coach-client working alliance goes with better coaching outcomes (association, not cause)https://consultants.coach/research/r-0005/https://consultants.coach/research/r-0005/Sun, 25 Oct 2026 00:00:00 -0400A meta-analysis of 27 samples (3,563 coaching processes) finds a moderate, robust association between working alliance and client outcomes (r = .41), strongest for satisfaction and perceived effectiveness, and a negative association with unintended negative effects (r = −.29).Recent workplace coaching studies: moderate effect, but no study measured business resultshttps://consultants.coach/research/r-0003/https://consultants.coach/research/r-0003/Sat, 24 Oct 2026 00:00:00 -0400A meta-analysis of 11 workplace coaching studies published after 2014 finds g = 0.44 overall, larger for skills than for attitudes, and notes that no included study measured results-level outcomes.Randomized trials of coaching show a moderate average effect, with signs of publication biashttps://consultants.coach/research/r-0001/https://consultants.coach/research/r-0001/Sat, 24 Oct 2026 00:00:00 -0400A meta-analysis of 37 randomized controlled trials (39 samples, n = 2,528) finds coaching improves leadership and personal outcomes, with a best estimate of g = .59, and reports significant publication bias.Psychologically informed coaching: strongest effects on goal attainment and self-efficacyhttps://consultants.coach/research/r-0004/https://consultants.coach/research/r-0004/Sat, 24 Oct 2026 00:00:00 -0400A meta-analysis of 20 studies (957 participants) of psychologically informed workplace coaching finds g = 0.51 overall, largest for goal attainment (g = 1.29), with no significant difference between coaching approaches.Executive coaching outcome research leans on case studies and self-report; few studies measure organizational effectshttps://consultants.coach/research/r-0006/https://consultants.coach/research/r-0006/Sat, 24 Oct 2026 00:00:00 -0400A systematic review of 110 peer-reviewed executive coaching outcome studies finds more than 70 reported outcomes, mostly from case studies and self-reports, with few studies looking at organizational results or social context.