Constancy or equilibrium of the internal conditions of the body.

 A statistic, such as a range or standard deviation, that indicates how tightly the scores in a set of observations cluster together.

 A theory that suggests that people attribute a behavior to a causal factor if that factor was present whenever the behavior occurred but was absent whenever it did not occur.

 A procedure conducted at the end of an experiment in which the researcher provides the participant with as much information about the study as possible and makes sure that no participant leaves feeling confused, upset, or embarrassed.

 The cells that integrate information across the retina; rather than sending signals toward the brain, horizontal cells connect receptors to each other.

 A Navajo concept referring to harmony, peace of mind, goodness, ideal family relationships, beauty in arts and crafts, and health of body and spirit.

 The therapy movement that encompasses all those practices and methods that release the potential of the average human being for greater levels of performance and greater richness of experience.

 A statistic, such as a mean, median, or mode, that provides one score as representative of a set of observations.

 A learned attitude toward a target object, involving negative affect (dislike or fear), negative beliefs (stereotypes) that justify the attitude, and a behavioral intention to avoid, control, dominate, or eliminate the target object.

 A consistent relationship between a response and the changes in the environment that it produces.