Hallucinogens are also known as ______

Marcy is trying to define anxiety in a way that can be measured. She is attempting to find an appropriate _____

a) independent variable. b) operational definition. c) causal hypothesis. d) theory.

Researchers believe that Guatemalan Mayan children were better able to remember the placement of 40 familiar objects in a play scene than their U.S. agemates because Mayan children

A) were more adept at relying on techniques such as spatial location and arrangement of objects. B) have better memory skills in practical, everyday situations. C) have better long-term memory. D) applied elaboration more effectively.