Glossary L

Light/Deep sleep refers to a stage of sleep which is described below:

Your brain waves move fast when you are awake. This is known as "beta" waves. When you lie down, close your e

In the context of psychology, the term "lighter" refers to a psychological state or condition characterized by a feeling of reduced emotional weight, a sense of relief, or an improved mood. This state is often associated with the alleviation of emotional burdens, stress, or negative emotions. People may experience a lighter emotional state after successfully addressing and resolving issues that were causing distress or after experiencing positive events that improve their overall well-being.

Lightheadedness is defined as a feeling you are "going to faint." Lightheadedness is medically distinct from dizziness, unsteadiness, and vertigo. Please see Dizziness, Unsteadiness, and Vertigo.

Lightness is perception of reflectance. Often objects with high reflectance are perceived as white and objects with low reflectance are perceived as gray or black.

Lightness constancy refers to the constancy of person's perception of an object’s lightness under different intensities of illumination.

Like-me-then-help-me technique refers to the strategy to increase compliance, based on the fact that people are more likely to assist others they find appealing than others they do not find appealing

Likelihood principle is the idea proposed by Helmholtz that humans perceive the object that is most likely to have caused the pattern of stimuli they have received.

Likert format is defined as a format for attitude scale items in which subjects indicate their degree of agreement to statements using these categories : strongly disagree, disagree, neither disagree nor agree, agree, strongly agree.