A laboratory [[experiment]] is a controlled [[scientific investigation]] conducted in a [[laboratory]] setting where [[researcher]]s manipulate one or more independent [[variable]]s to observe their effect on dependent [[variable]]s. This type of experiment allows for precise control over [[environment]]al [[condition]]s, ensuring that external [[factor]]s do not influence the [[result]]s. Laboratory experiments are commonly used in fields such as chemistry, biology, physics, and psychology to establish causal relationships and test hypotheses under replicable conditions.