Correlational procedures that you are likely to see employed in research studies will often use the Pearson product-moment correlation coefficient (abbreviated as r) or the Spearman rank order correlation coefficient (rho).
... cassava, maize, bamboo shoots, millet, and sweet potatoes) are dietary Staples in areas of the world where iodine deficiency is prevalent, and thus contribute to goiter formation (Stanbury 1977; Hetzel and Dunn 1989).
Cook and Campbell (1979) list a number of threats to the internal validity of a design. Many are well known to researchers in this field and require no definition: selection effects, statistical regression, history, maturation, ...
Within the past decade there has been a veritable explosion of interest in the relationship between food and human behavior. It seems that there is an insatiable desire to find...
This book will provide interested readers in the fields of nutrition and psychology with information on how these two areas of current research interface.