Boys' brains are about _____ percent larger than the brains of girls.

Bulimia nervosa is clinically present in _____ percent of young women in the united states.

By 24 months, most children are about ____ percent of their adult height.

Compared to older adults, adults in their 20s and 30s have __________________.

Following fertilization, a one-celled ________ multiplies and forms a ____________.

For erikson, delinquency is an attempt to establish _____, even if it is a negative one.

A developmental design in which multiple groups of participants of different ages are followed over time, combining cross-sectional and _______ is called sequential research design

A developmental study in which one group of participants is studied repeatedly to infer age changes is called

A developmental ________ that compares people of different ages at a single point in time to infer age differences

Random assignment is a method of assigning participants that ensures each participant has an equal chance of being assigned to the experimental group or control group.

The factor proposed to change the behavior under study in an experiment; it is systematically manipulated during an experiment is known as