Research Framework
 |
|
Glossary of Research Terms
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Nominal scale A scale whose numbers serve only as labels or tags for identifying and classifying objects with a strict one-to-one correspondence between the numbers and the objects. Back To Top Noncomparative scale A scale in which each stimulus object is scaled independently of the other objects in the stimulus set. Back To Top Nonhierarchical clustering A procedure that first assigns or determines a cluster center and then groups all objects within a prespecified threshold value from the center. Back To Top Nonmetric ANOVA An ANOVA technique for examining the difference in the central tendencies of more than two groups when the dependent variable is measured on an ordinal scale. Back To Top Nonmetric correlation A correlation measure for two nonmetric variables which relies on rankings to compute the correlations. Back To Top Nonmetric data Data derived from a nominal or ordinal scale. Back To Top Nonmetric MDS A type of multidimensional scaling which assumes that the input data are ordinal. Back To Top Nonparametric tests A hypothesis-testing procedure in which the variables are measured on a nominal or ordinal scale. Back To Top Nonprobability sampling A sampling technique that relies on the judgement of the researcher. Back To Top Nonresponse bias Bias attributable to the response difference in that portion of the sample which dos not respond to a questionnaire. Back To Top Nonresponse error Nonsampling error that occurs when some of the respondents included in the sample do not respond; the variation between the true mean value of the variable in the original sample and the true mean value in the net sample. Back To Top Nonsampling error Error attributable to sources other than sampling including nonresponse errors and response errors. Back To Top Normal distribution A bell-shaped symmetric distribution whose mean, median, and mode are all identical. Null hypothesisA statement of no difference or no effect. If the null hypothesis is not rejected, no changes will be made. Back To Top N-way analysis of variance An ANOVA technique that enables the researcher to examine interactions between the factors. Back To Top |
