Why do studies that use probability (random) samples have excellent external validity?

In Erik Erikson’s theory, adults strive for generativity to achieve a sense of ________.

According to James Marcia, what determines an individual’s identity status?

Dr. Abbott is a personality psychologist who is interested in studying the characteristics of people who report being abducted by UFOs. She finds several people in an online support group for UFO abductees to participate and asks them if they can provide the names and contact information of other people who have also been abducted. Upon contacting these new participants, she asks them to refer her to even more people they may know who have been abducted. This is an example of what kind of sampling?

Is Spina Bifida or Anencephaly more catastrophic to the baby’s health/survival?

Random assignment is to internal validity as random sampling is to external validity.

When should mom start taking folic acid? (Written by Brylea J. in Corinth, Spring 2019)

The use of a transport protein to move solute molecules across the plasma membrane from areas of high to low concentration is known as:

A cow with black and white patches is produced from a white bull and a black cow. This is an example of

What protects children from negative self-evaluations? (select multiple answers if you see fit)