Quality Research in Literacy and Science Education - International Perspectives and Gold Standards (Paperback, Softcover reprint of hardcover 1st ed. 2009)

Statistical models attempt to describe and quantify relationships between variables. In the models presented in this chapter, there is a response variable (sometimes called dependent variable) and at least one predictor variable (sometimes called independent or explanatory variable). When investigating a possible cause-and-effect type of relationship, the response variable is the putative effect and the predictors are the hypothesized causes. Typically, there is a main predictor variable of interest; other predictors in the model are called covariates. Unknown covariates or other independent variables not controlled in an experiment or analysis can affect the dependent or outcome variable and mislead the conclusions made from the inquiry (Bock, Velleman, & De Veaux, 2009). A p value (p) measures the statistical significance of the observed relationship; given the model, p is the probability that a relationship is seen by mere chance. The smaller the p value, the more confident we can be that the pattern seen in the data 2 is not random. In the type of models examined here, the R measures the prop- tion of the variation in the response variable that is explained by the predictors 2 specified in the model; if R is close to 1, then almost all the variation in the response variable has been explained. This measure is also known as the multiple correlation coefficient. Statistical studies can be grouped into two types: experimental and observational.

General

Imprint:	Springer
Country of origin:	Netherlands
Release date:	October 2010
First published:	2009
Editors:	MacK C Shelley • Larry D. Yore • Brian B. Hand
Dimensions:	235 x 155 x 35mm (L x W x T)
Format:	Paperback
Pages:	666
Edition:	Softcover reprint of hardcover 1st ed. 2009
ISBN-13:	978-90-481-7877-3
Categories:	Books > Language & Literature > Language teaching & learning (other than ELT) > General Books > Social sciences > Education > Teaching of a specific subject Books > Social sciences > Sociology, social studies > Social research & statistics > General Books > Social sciences > Education > Organization & management of education > General Promotions
LSN:	90-481-7877-0
Barcode:	9789048178773

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