Fig. 4.

Task completion milestones. (A) The four milestones in the problem-solving process: (i) the first intermediate solution is generated, (ii) the best intermediate solution is generated, (iii) the final solution is generated, and (iv) the final solution is submitted. (B, D, F, and H) The time spent (in minutes) by groups and individuals (whether random, highest-scoring, fastest, or most efficient) in each time segment. (C, E, G, and I) The standardized time spent (transformed to z scores; i.e., showing the relative difference within complexity level) in each time segment. Error bars indicate the 95% confidence intervals.