In Tajfel's (1971) research on nominal groups, being labeled as "underestimators" and "overestimators" was enough to establish ___________

The fine details of neuron structure in a brain slice or section are revealed by

a. albumin fixation. b. stains. c. immersion in xylene. d. cyanoacrylate glue. e. visual examination of raw brain slices using MRI.

A negative correlation describes a relationship in which ____

a. ?one variable has no effect on another variable b. ?one variable decreases while another variable increases c. ?two variables increase together d. ?two variables decrease together