A researcher conducts a two-way within-subjects factorial experimental design in which one factor had two levels. If 60 total participants were observed in each group, then the second factor must have how many levels?

The presence of two personality types in a particular species of bird has found that ____ birds have greater success when _______

A) bold; resources are limited B) timid; resources are limited C) bold; resources are plentiful D) both types of; they are social

Tracy is 9 months old. She is growing and changing so quickly it is difficult for her parents to keep up with all the new things she is learning

Her parents have lately noticed that Tracy is spending more time and energy trying to do things for herself. This is a sign that she is beginning to develop ______. a. self-recognition c. a sense of attachment b. self-attention d. a sense of autonomy