The sources

Does Incubation Enhance Problem Solving? A Meta-Analytic Review

Sio, Ut Na, and Thomas C. Ormerod · Psychological Bulletin 135, no. 1 · 2009

Read the original

Research behind the Workbook’s instruction to give a difficult decision a short human interval before bringing in AI. Retained under Other Sources because it supports a practical exercise rather than the current Chapter 22 prose.

Cited in

Sio, Ut Na, and Thomas C. Ormerod. 'Does Incubation Enhance Problem Solving? A Meta-Analytic Review.' Psychological Bulletin 135, no. 1 (2009): 94–120. https://doi.org/10.1037/a0014212.