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Reticular Activating System The reticular activating system is a structure in the brain stem that is responsible for arousal and sleep. The …

Resistance During psychoanalysis, there are many signs that the client and therapist are making progress and working toward identifying the root of …

Repression (repressed memory) When explaining repression, Freud compared the process to “condemnation” and stated the following: “Let us take a model, an …

Representative Sample When conducting a study, a researcher selects a relatively small group of participants (a sample) from an entire population of …

Representative Heuristic A Representative Heuristic is a cognitive bias in which an individual categorizes a situation based on a pattern of previous …

Replication Getting some results in one research study is nice, but as scientists we like to make sure of the findings. To …

REM Sleep There are two types of sleep, REM and NREM (non-REM). REM, which is also known as paradoxical sleep, stands for …

REM Rebound When you are sleep deprived you lose out on two types of sleep, REM and NREM (non- REM). Typically when …

Reliability Reliability refers to the extent to which a test or other instrument is consistent in its measures. For example, a weight …

Relative Size Relative size is a perceptual clue that allows you to determine how close objects are to an object of known …