Common Superstitions

partial reinforcement effect, and this has been used to explain superstitious behaviour in humans. To be more precise, this effect means that, whenever an individual performs an action expecting a reinforcement, and none seems forthcoming, it actually creates a sense of persistence within the individual.^[18] This strongly parallels superstitious behaviour in humans because the individual feels that, by continuing this action, reinforcement will happen; or that reinforcement has come at certain times in the past as a result of this action, although not all the time, but this may be one of those times.
From a simpler perspective, natural selection will tend to reinforce a tendency to generate weak associations. If there is a strong survival advantage to making correct associations, then this will outweigh the negatives of making many incorrect, "superstitious" associations.^[19] It has also been argued that there may be connections between OCD and superstition.^[20]This may be connected to hygiene.