Glossary N

Glossary N

Nonoxynol-9 refers to a spermicide that has been used to prevent pregnancy and protect against sexually transmitted infections.

Nonparametric test refers to hypothesis test that does not require numerical scores and does not involve a hypothesis about specific population parameters. Moreover, Nonparametric test is a test of statistical inference that does not require any assumptions about the underlying population distributions, such as that they are normally distributed. Chi-square test for independence is an example of a Nonparametric test.

Nonparental care refers to child care arrangements in which infants and toddlers are taken care of by persons who are not their parents. Center-based care includes day care centers, Head Start programs, preschool, prekindergarten, and other early childhood programs

Deutsch: Nichtteilnehmer / Español: No participante / Português: Não participante / Français: Non-participant / Italiano: Non partecipante

Nonparticipant in the psychology context often refers to a methodological role in observational research, where the researcher observes the behavior of subjects without interacting with them or altering the environment in any way. This approach is used to gather data on naturally occurring behaviors without the influence that the presence or intervention of the researcher might have on those behaviors. Nonparticipant observation is a key technique in various areas of psychology, including developmental, social, and clinical psychology.

Nonparticipant observation. Please see Naturalistic observation.

Nonprobability sampling refers to any technique in which samples are selected in some way not suggested by probability theory. Examples include reliance on available subjects as well as purposive (judgmental), quota, and snowball sampling. Nonprobability sampling, moreover is a method of sampling in which the population is not completely known, individual probabilities cannot be known, and the selection is based on factors such as common sense or ease with an effort to maintain representativeness and avoid bias.

Nonpurging type refers to a form of Bulimia Nervosa in which individuals compensate for what they eat by fasting or engaging in excessive exercise.

Nonreduplicated babbling is defined as babbling which contains sequences of different syllables as opposed to repetition of the same syllable over and over, as in reduplicated babbling.