The task is a fun brain teaser that consists in finding, with three uses of a scale, the one ball that is either heavier or lighter than the rest of a set of 12 balls. The purpose of the study is to better understand how people learn to solve planning-intensive tasks.
Judge an initial anchor phrase according to how likely to be used you think it is. Use sliders or numbers to compare other phrases to the anchor phrase. Lasts approximately 15-20 minutes. Only suitable for fluent English speakers.
This experiment investigates how people understand If-then sentences and Or sentences. Formal logic includes transformation rules of if then to or and vice versa that result in a paradox if taken together. In this experiment we want to see to what extent people accept the single steps leading to the paradox.
How confident can we be when a witness says that they are sure that a person is the offender? This experiment explores the factors that determine the confidence-accuracy relationship.