Observation

Observation is the active acquisition of information from a primary source.

In terms of communication, information is expressed either as the content of a message or through direct or indirect observation.

The purpose of an experiment is to determine whether observations agree with or conflict with the predictions derived from a hypothesis.

Observations can be qualitative, that is, only the absence or presence of a property is noted, or quantitative if a numerical value is attached to the observed phenomenon by counting or measuring.

The process of measurement is central to quantitative research because it provides the fundamental connection between empirical observation and mathematical expression of quantitative relationships.

Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories.

Field research involves a range of well-defined, although variable, methods: informal interviews, direct observation, participation in the life of the group, collective discussions, analyses of personal documents produced within the group, self-analysis, results from activities undertaken off- or on-line, and life-histories.

Observations can be qualitative, that is, only the absence or presence of a property is noted, or quantitative if a numerical value is attached to the observed phenomenon by counting or measuring.

In science, an empirical relationship is a relationship or correlation based solely on observation rather than theory.

Observations can be qualitative, that is, only the absence or presence of a property is noted, or quantitative if a numerical value is attached to the observed phenomenon by counting or measuring.

Introspection is closely related to human self-reflection and is contrasted with external observation.

It is the practice and study of observing celestial objects with the use of telescopes and other astronomical instruments.

Observations and Measurements (O&M) is an international standard which defines a conceptual schema encoding for observations, and for features involved in sampling when making observations.

Systematic error may also refer to an error with a non-zero mean, the effect of which is not reduced when observations are averaged.

In the philosophy of science, observations are said to be "theory-laden" when they are affected by the

In statistics, observable variable or observable quantity (also manifest variables), as opposed to latent variable, is a variable that can be observed and directly measured.

Observation is the active acquisition of information from a primary source.

In living beings, observation employs the senses. Human sense impressions are subjective and qualitative, making them difficult to record or compare.

In science, observation can also involve the perception and recording of data via the use of scientific instruments.

Observations can be qualitative, that is, only the absence or presence of a property is noted, or quantitative if a numerical value is attached to the observed phenomenon by counting or measuring.

However, the need for reproducibility requires that observations by different observers can be comparable.

Human sense impressions are subjective and qualitative, making them difficult to record or compare.

Observations can be qualitative, that is, only the absence or presence of a property is noted, or quantitative if a numerical value is attached to the observed phenomenon by counting or measuring. Human sense impressions are subjective and qualitative, making them difficult to record or compare.

Measurement consists of using observation to compare the phenomenon being observed to a standard unit.

Human senses are limited and subject to errors in perception, such as optical illusions.