​Which type of study typically needs the smallest sample of participants?

​Giselle is three weeks old and during a diaper change she looks up at her mother and smiles. Her mother gets very excited and immediately tells her husband, Chin, what happened. Since Chin has read your textbook, he thinks to himself:

​Russian psychologist ____ proposed the idea that development in childhood is an apprenticeship in which children advance when they collaborate with more-skilled others.

​Which statement regarding temperament is false?

​Out of the 200-500 million sperm cells that are released during an ejaculation, only ____ complete the short journey up the Fallopian tubes to where an egg is waiting to be fertilized.

​If you wanted to be very specific, you would say that a tiny cluster of cells at the center of a zygote, called the _______________, is what eventually develops into the baby.

​According to your authors, children who engage in make-believe play tend to be more advanced in several areas. Which of the following is NOT one of them?

​Randi is pregnant for the first time. Given the frequency with which twins and triplets have occurred in her family, she is understandably concerned that she will have a multiple-birth pregnancy. If you were her gynecologist, which of the following prenatal tests would you recommend to either confirm or rule out the number of babies she is carrying?

​According to Bandura, experience gives people a sense of self-____, which to a person’s beliefs about their own abilities and talents.

​According to your text, what is the first step in doing research in the field of human development?