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Opportunity Sampling Opportunity Sampling or Convenience Sampling is a type of Non-probability Sampling where participants are selected based on naturally occurring groups.…

Opponent Process Theory A theory suggested by Solomon where emotional reactions to a stimulus are followed by opposite emotional reactions. This theory…

Opiates Opiates are depressant type drugs that are derived from opium. Typically opiates are used to relieve pain and create a euphoric…

Operational Definition A statement of the procedures or ways in which a researcher is going to measure behaviors or qualities. For example,…

Operant Conditioning Operant Conditioning is a type of learning in which a behavior is strengthened (meaning, it will occur more frequently) when…

Operant Chamber The operant chamber was created by B.F. Skinner to assist with laboratory analysis of animal behavior. The chamber is a…

Operant Behavior In psychology, we often compare and contrast two different types of conditioning or learning: Operant Conditioning and Classical Conditioning. Within…

One-Word Stage During language development children go through stages during which their language gets better and better until they can finally speak…

One-Trial Learning As its name suggests, the theory of one trial learning states that learning takes place in a single pairing of…

Oedipus Complex Within the psychodynamic theory, the Oedipus Complex occurs during the phallic stage and is a conflict in which the boy…