In random assignment, a researcher makes certain that each participant has an equal chance of being assigned to any of the groups or conditions in an experiment

Olga is almost 10 years old. Over the past months, she has noticed the appearance of pubic hair, followed by the appearance of breast buds, and recently she has begun to grow taller and heavier. This order of pubertal events is found to

a. occur only in industrialized countries. b. signal the onset of her age of identity negotiation. c. be typical for an adolescent female. d. be highly unlikely to occur in the typical adolescent female.

Japanese infants rarely show __________ attachment

A) disorganized/disoriented B) avoidant C) resistant D) secure