Empirical studies comparing different national and cultural groups consistently demonstrate significant cross-cultural variations in cognitive planning and social problem-solving strategies.
The claim asserts that there are significant cross-cultural differences in problem-solving skills. Papers 1 and 4 directly investigate and find empirical evidence of cross-cultural differences in problem-solving and planning tasks (e.g., between Brazilians and Germans, and between Polish and British participants). No retrieved papers refute the existence of cross-cultural differences in problem-solving. Therefore, the claim is supported.