________ are chemical signals that are used as communication devices within a given species to signal relevant stimuli

What is the following used to calculate: (number of rows - 1) (number of columns - 1)?

a. Expected cell value b. Correlation coefficient c. Effect size d. Degrees of freedom

Jean Piaget is best known for his pioneering work in the area of _____ development

A) social B) cognitive C) psychosocial D) identity