In this paper, some problems related to the construction of highly D‑efficient spring balance weighing designs are presented. We give conditions determining relations between parameters such and examples.

Although prior studies have found that people generally underweight advice from others, such discounting of advice is not universal. Two studies examined the impact of task difficulty on the use of advice. In both studies, the strategy participants used to weigh advice varied with task difficulty even when it should have not. In particular, the results show that people overweight advice on diff...