Middle Ages

Ghosts reported in medieval Europe tended to fall into two categories: the souls of the dead, or demons. The souls of the dead returned for a specific purpose. Demonic ghosts were those which existed only to torment or tempt the living. The living could tell them apart by demanding their purpose in the name of Jesus Christ. The soul of a dead person would divulge their mission, while a demonic ghost would be banished at the sound of the Holy Name.

Most ghosts were souls assigned to Purgatory, condemned for a specific period to atone for their transgressions in life. Their penance was generally related to their sin. For example, the ghost of a man who had been abusive to his servants was condemned to tear off and swallow bits of his own tongue; the ghost of another man, who had neglected to leave his cloak to the poor, was condemned to wear the cloak, now "heavy as a church tower". These ghosts appeared to the living to ask for prayers to end their suffering. Other dead souls returned to urge the living to confess their sins before their own deaths.

Medieval European ghosts were more substantial than ghosts described in the Victorian age, and there are accounts of ghosts being wrestled with and physically restrained until a priest could arrive to hear its confession. Some were less solid, and could move through walls. Often they were described as paler and sadder versions of the person they had been while alive, and dressed in tattered gray rags. The vast majority of reported sightings were male.

There were some reported cases of ghostly armies, fighting battles at night in the forest, or in the remains of an Iron Agehillfort, as at Wandlebury, near Cambridge, England. Living knights were sometimes challenged to single combat by phantom knights, which vanished when defeated.

From the medieval period an apparition of a ghost is recorded from 1211, at the time of the Albigensian Crusade.Gervase of Tilbury, Marshal of Arles, wrote that the image of Guilhem, a boy recently murdered in the forest, appeared in his cousin's home in Beaucaire, near Avignon. This series of "visits" lasted all of the summer. Through his cousin, who spoke for him, the boy allegedly held conversations with anyone who wished, until the local priest requested to speak to the boy directly, leading to an extended disquisition on theology. The boy narrated the trauma of death and the unhappiness of his fellow souls in Purgatory, and reported that God was most pleased with the ongoing Crusade against the Cathar heretics, launched three years earlier. The time of the Albigensian Crusade in southern France was marked by intense and prolonged warfare, this constant bloodshed and dislocation of populations being the context for these reported visits by the murdered boy.

Haunted houses are featured in the 9th-century Arabian Nights (such as the tale of Ali the Cairene and the Haunted House in Baghdad).

 

Common attributes-

Another widespread belief concerning ghosts is that they are composed of a misty, airy, or subtle material. Anthropologists link this idea to early beliefs that ghosts were the person within the person (the person's spirit), most noticeable in ancient cultures as a person's breath, which upon exhaling in colder climates appears visibly as a white mist. This belief may have also fostered the metaphorical meaning of "breath" in certain languages, such as the Latin spiritus and the Greek pneuma, which by analogy became extended to mean the soul. In the Bible, God is depicted as synthesising Adam, as a living soul, from the dust of the Earth and the breath of God.

In many traditional accounts, ghosts were often thought to be deceased people looking for vengeance (vengeful ghosts), or imprisoned on earth for bad things they did during life. The appearance of a ghost has often been regarded as an omen or portent of death. Seeing one's own ghostly double or "fetch" is a related omen of death.

White ladies were reported to appear in many rural areas, and supposed to have died tragically or suffered trauma in life. White Lady legends are found around the world. Common to many of them is the theme of losing or being betrayed by a husband or fiancé. They are often associated with an individual family line or regarded as a harbinger of death similar to abanshee.

Legends of ghost ships have existed since the 18th century; most notable of these is the Flying Dutchman. This theme has been used in literature in The Rime of the Ancient Mariner by Coleridge.

 

Haunted House-

A place where ghosts are reported is described as haunted, and often seen as being inhabited by spirits of deceased who may have been former residents or were familiar with the property. Supernatural activity inside homes is said to be mainly associated with violent or tragic events in the building's past such as murder, accidental death, or suicide — sometimes in the recent or ancient past. But not all hauntings are at a place of a violent death, or even on violent grounds. Many cultures and religions believe the essence of a being, such as the 'soul', continues to exist. Some religious views argue that the 'spirits' of those who have died have not 'passed over' and are trapped inside the property where their memories and energy are strong. According to science writer Terence Hines, cold spots, creaking sounds, and odd noises are typically present in any home, especially older ones, and "such noises can easily be mistaken for the sound of footsteps by those inclined to imagine the presence of a deceased tenant in their home.

David Turner, a retired chemist, suggested that ball lightning could cause inanimate objects to move erratically.

Skeptical investigator Joe Nickell writes that in most cases he investigated, he found plausible explanations for haunting phenomena, such as physical illusions, waking dreams, and the effects of memory. According to Nickell, the power of suggestion along with confirmation bias plays a large role in perceived hauntings. "As a house, inn, or other place becomes thought of as "haunted," more and more ghostly encounters are reported" says Nickell, "When people are given to expect paranormal events, they tend to notice those conditions that would confirm their expectations."

Toxicologist Albert Donnay believes that chronic exposure to substances such as carbon monoxide, pesticide, andformaldehyde can lead to hallucinations of the type associated with haunted houses. Donnay speculates on the connection between the prevalence of gas lamps during the Victorian era and start of the 20th century stories of ghost sightings and hauntings, describing it as the "Haunted House Syndrome". Donnay says that carbon monoxide poisoning has been linked to haunted houses since at least the 1920s, citing a 1921 journal article published about a family who suffered headaches, auditory hallucinations, fatigue, melancholy, and other symptoms associated with haunted houses.

Michael Persinger, Jason Braithewaite, and others, suggested that perceived apparitions, cold spots, and ghostly touches are perceptual anomalies caused by variations in naturally occurring or man-made magnetic fields. However, a study by psychologist Chris French and others that attempted to replicate Persinger's findings found no link.

 

Spiritualism-

Spiritualism is a belief that spirits of the dead have both the ability and the inclination to communicate with the living. The afterlife, or "spirit world", is seen by spiritualists, not as a static place, but as one in which spirits continue to evolve. These two beliefs: that contact with spirits is possible, and that spirits are more advanced than humans, leads spiritualists to a third belief, that spirits are capable of providing useful knowledge about moral and ethical issues, as well as about the nature of God. Some spiritualists will speak of a concept they refer to as a "spirit guides"–specific spirits, often contacted, who are relied upon for spiritual guidance. Spiritism, a branch of spiritualism developed by Allan Kardec and today found mostly in Continental Europe and Latin America, especially Brazil, emphasizes reincarnation.

Spiritualism developed and reached its peak growth in membership from the 1840s to the 1920s, especially in English-speaking countries. By 1897, spiritualism was said to have more than eight million followers in the United States and Europe, mostly drawn from the middle and upper classes.

Spiritualism flourished for a half century without canonical texts or formal organization, attaining cohesion through periodicals, tours by trance lecturers, camp meetings, and the missionary activities of accomplished mediums. Many prominent spiritualists were women, and like most spiritualists, supported causes such as the abolition of slavery and women's suffrage. By the late 1880s the credibility of the informal movement had weakened due to accusations of fraud perpetrated by mediums, and formal spiritualist organizations began to appear. Spiritualism is currently practiced primarily through various denominational spiritualist churches in the United States, 

Spiritualism is a monotheistic belief system or religion, postulating a belief in God, but with a distinguishing feature of belief that spirits of the dead residing in the spirit world can be contacted by "mediums", who can then provide information about the afterlife.

Spiritualism developed in the United States and reached its peak growth in membership from the 1840s to the 1920s, especially in English-language countries. By 1897, it was said to have more than eight million followers in the United States and Europe, mostly drawn from the middle and upper classes, while the corresponding movement in continental Europe and Latin America is known as Spiritism.

The religion flourished for a half century without canonical texts or formal organization, attaining cohesion by periodicals, tours by trance lecturers, camp meetings, and the missionary activities of accomplished mediums. Many prominent Spiritualists were women. Most followers supported causes such as the abolition of slavery and women's suffrage.By the late 1880s, credibility of the informal movement weakened, due to accusations of fraud among mediums, and formal Spiritualist organizations began to appear. Spiritualism is currently practiced primarily through various denominational Spiritualist Churches in the United States and United Kingdom.

 

Scientific view-

The physician John Ferriar wrote An essay towards a theory of apparitions in 1813 in which he argued that sightings of ghosts were the result of optical illusions. Later the French physician Alexandre Jacques François Brière de Boismontpublished On Hallucinations: Or, the Rational History of Apparitions, Dreams, Ecstasy, Magnetism, and Somnambulism in 1845 in which he claimed sightings of ghosts were the result of hallucinations.

David Turner, a retired physical chemist, suggested that ball lightning could cause inanimate objects to move erratically.

Joe Nickell of the Committee for Skeptical Inquiry wrote that there was no credible scientific evidence that any location was inhabited by spirits of the dead. Limitations of human perception and ordinary physical explanations can account for ghost sightings; for example, air pressure changes in a home causing doors to slam, or lights from a passing car reflected through a window at night. Pareidolia, an innate tendency to recognize patterns in random perceptions, is what some skeptics believe causes people to believe that they have 'seen ghosts'. Reports of ghosts "seen out of the corner of the eye" may be accounted for by the sensitivity of human peripheral vision. According to Nickell, peripheral vision can easily mislead, especially late at night when the brain is tired and more likely to misinterpret sights and sounds.

According to research in anomalistic psychology visions of ghosts may arise from hypnagogic hallucinations ("waking dreams" which are experienced in the transitional states to and from sleep). In a study of two experiments into allegedhauntings (Wiseman et al. 2003) came to the conclusion "that people consistently report unusual experiences in ‘haunted' areas because of environmental factors, which may differ across locations." Some of these factors included "the variance of local magnetic Žfields, size of location and lighting level stimuli of which witnesses may not be consciously aware".

Some researchers, such as Michael Persinger of Laurentian University, Canada, have speculated that changes ingeomagnetic fields (created, e.g., by tectonic stresses in the Earth's crust or solar activity) could stimulate the brain'stemporal lobes and produce many of the experiences associated with hauntings. Sound is thought to be another cause of supposed sightings. Richard Lord and Richard Wiseman have concluded that infrasound can cause humans to experience bizarre feelings in a room, such as anxiety, extreme sorrow, a feeling of being watched, or even the chills. Carbon monoxide poisoning, which can cause changes in perception of the visual and auditory systems, was speculated upon as a possible explanation for haunted houses as early as 1921.

 

Modern Era-

Professional parapsychologists and "ghosts hunters", such as Harry Price, active in the 1920s and 1930s, and Peter Underwood, active in the 1940s and 1950s, published accounts of their experiences with ostensibly true ghost stories such as Price's The Most Haunted House in England, and Underwood's Ghosts of Borley(both recounting experiences at Borley Rectory). The writer Frank Edwards delved into ghost stories in his books of his, like "Stranger than Science."

Children's benevolent ghost stories became popular, such as Casper the Friendly Ghost, created in the 1930s and appearing in comics, animated cartoons, and eventually a 1995 feature film.

With the advent of motion pictures and television, screen depictions of ghosts became common, and spanned a variety of genres; the works of Shakespeare, Dickens and Wilde have all been made into cinematic versions. Novel-length tales have been difficult to adapt to cinema, although that of The Haunting of Hill Houseto The Haunting in 1963 is an exception.

Sentimental depictions during this period were more popular in cinema than horror, and include the 1947 film The Ghost and Mrs. Muir, which was later adapted to television with a successful 1968–70 TV series. Genuine psychological horrorfilms from this period include 1944's The Uninvited, and 1945's Dead of Night.

 

Post-modern (1970–present)-

The 1970s saw screen depictions of ghosts diverge into distinct genres of the romantic and horror. A common theme in the romantic genre from this period is the ghost as a benign guide or messenger, often with unfinished business, such as 1989's Field of Dreams, the 1990 film Ghost, and the 1993 comedy Heart and Souls. In the horror genre, 1980's The Fog, and the A Nightmare on Elm Streetseries of films from the 1980s and 1990s are notable examples of the trend for the merging of ghost stories with scenes of physical violence.

Popularised in such films as the 1984 comedy Ghostbusters, ghost hunting became a hobby for many who formed ghost hunting societies to explore reportedly haunted places. The ghost hunting theme has been featured in reality television series, such as Ghost Adventures, Ghost Hunters, Ghost Hunters International, Ghost Lab, Most Haunted, and A Haunting. It is also represented in children's television by such programs as The Ghost Hunter and Ghost Trackers. Ghost hunting also gave rise to multiple guidebooks to haunted locations, and ghost hunting "how-to" manuals.

The 1990s saw a return to classic "gothic" ghosts, whose dangers were more psychological than physical. Examples of films from this period include 1999's The Sixth Sense and The Others.

Asian cinema has also produced horror films about ghosts, such as the 1998 Japanese film Ringu (remade in the US as The Ring in 2002), and the Pang brothers' 2002 film The Eye. Indian ghost movies are popular not just in India, but in the Middle East, Africa, South East Asia, and other parts of the world. Some Indian ghost movies such as the comedy / horror film Chandramukhi have been commercial successes, dubbed into several languages.

In fictional television programming, ghosts have been explored in series such as Supernatural, Ghost Whisperer, andMedium.

In animated fictional television programming, ghosts have served as the central element in series such as Casper the Friendly Ghost, Danny Phantom, and Scooby-Doo. Various other television shows have depicted ghosts as well.