A researcher is interested in whether moods vary by the day of the week. She codes the postings on thousands of Facebook pages to see whether people express more positive comments on some days than others. Which research method has she used?

Talia, 12, is convinced that Roberto is the most amazing person on earth

A) delusion. B) infatuation. C) committed relationship. D) positive working model.

According to the video, object permanence is universal across cultures. Why would this be such an important concept for children to acquire?

What will be an ideal response?