Experiments and Relational Studies in Problem Solving: A Meta-Analysis

vs. concrete 9 (9, 0) 2536 4-12 -0.14* (-0.24, -0.04) Factual vs. hypothetical 9 (9, 0) 2616 4-12 0.02 (-0.08, 0.12) Familiar vs. unfamiliar 4 (4, 0) 1608 5-6, 12 0.40* (0.27, 0.53) Imaginative vs. ordinary 11 (11, 0) 4308 5-9 0.17* (0.09, 0.25) Personalized vs. impersonal 6 (6, 0) 579 4, 6 0.04 (-0.18, 0.26) Preferred vs. nonpreferred 5 (5, 0) 256 9, P -0.04 (-0.37, 0.29) aThe number outside the parentheses is the total number of studies. The first number inside the parentheses is the number of studies with standard problems; the second is the number of studies with nonstandard problems. *p <.01. This content downloaded from 207.46.13.172 on Fri, 07 Oct 2016 05:57:34 UTC All use subject to http://about.jstor.org/terms