What is "practice play"? How might it be beneficial in an evolutionary sense?
What will be an ideal response?
A good answer will include the following key points:
• Practice play occurs among the young of many species who engage in behaviors that later will be used for serious purposes.
• For example, young kittens will stalk, pounce on, and fight with each other, behaviors that will later be used to obtain food and fight off predators.
• Human children at play are practicing their social, motor, and linguistic skills.
• Practice play teaches young animals important skills that will be needed for survival.
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In an experiment, a researcher gives some patients psychotherapy, gives others medication, and puts others on a waiting list. The researcher then measures how depressed the patients are feeling after six months. What is the independent variable in this experiment?
a. number of patients b. time span of six months c. improvement in depression d. kind of treatment received
Dr. Lim conducts a study in which he places either an expensive or a cheap purse on a park bench. He then counts how many people try to return the purse to its owner. What kind of study is this?
a. experiment b. field experiment c. correlational d. observational