The area of judgment and decision making has given rise to the study o
f many interesting phenomena, including reasoning fallacies, which are
also of interest to behavior analysts. Indeed, techniques and princip
les of behavior analysis may be applied to study these fallacies. This
article reviews research from a behavioral perspective that suggests
that humans are not the information-seekers we sometimes suppose ourse
lves to be. Nor do we utilize information effectively when it is prese
nted. This is shown from the results of research utilizing matching to
sample and other behavioral tools (monetary reward, feedback, instruc
tional control) to study phenomena such as the conjunction fallacy, ba
se-rate neglect, and probability matching. Research from a behavioral
perspective can complement research from other perspectives in further
ing our understanding of judgment and decision making.