A type of clairvoyance facilitated by the handling of an object, which enables the psychic to describe key incidents in the lives of its previous owners. 

An experimental form of ESP that emerged in the late 1960s, in which a suitably trained person attempts in a meditative state to visualise the topography of a distant scene. A considerable degree of success has been demonstrated by three scientific groups, one funded by the US military. 

Ground-breaking 1884 paper by physiologist and psi researcher Charles Richet, devoted mainly to his use of statistics in telepathy experiments, an approach that became fully established only in the 1930s. 

Limited but significant psi research has been carried out in Russia since the 19th century.

The sense of knowing when one is being stared at is commonly reported, notably by police and other professionals involved in surveillance activities. Recent experimental investigations suggest that the phenomenon is real. 

Experimental research appears to establish the sense of being stared at as a real phenomenon, as described here. This article discusses possible theoretical implications with regard to theories of vision.

An approach to psi experimentation that differentiates subjects who believe that psi is possible, or that it's a genuine phenomenon ('sheep') from those who do not ('goats'). 

In Mental Radio (1930), American writer Upton Sinclair described telepathy experiments he carried out with his wife Craig, in which she successfully reproduced drawings made by him and unseen by her.

Controversial nineteenth century episode of telepathy experiments involving two young men, one of whom in later life claimed they had cheated, which the other vigorously denied.  

The super-psi hypothesis is the claim that psychic functioning is  more extensive than the evidence would suggest, and that it might  play a pervasive role in everyday affairs.