When people or roaches undertake a difficult task, the presence of others ________ performance; when they undertake a simple task, the presence of others ________ performance

Which of the following statements about couples who cohabit before they are married is true?

They are less likely to experience domestic violence. They are more likely to divorce if they marry. They are more likely to engage in extramarital affairs. They are less likely to divorce.

It does not take infants long to start recognizing differences between speech sounds. This is a _____ skill

A) cognitive B) perceptual C) social D) reflective