Why should literature reviews avoid solely including studies that support the author’s own hypothesis?

Remembering the video, what is the Visual Cliff experiment?  In the context of development of depth perception, what was the experiment trying to test?  What were the independent and dependent variables?  What did the experimenter conclude?

Characterize the conflicts in New England among the white settlements in New England in the seventeenth century (1600s-1700s)

Chronic back pain has become common in children due to overfilled and overweight backpacks. Heavy school books, notebooks, calculators, and computer equipment, all crammed into a backpack, increase the chance of neck and shoulder muscle spasms and lower back pain. Research has shown that the total weight carried is directly related to the volume of a backpack. The volume of a randomly selected backpack sold commercially is normally distributed with mean 600 in3 and standard deviation 100 in3. Find the probability the average volume of 30 randomly selected backpacks is at least 625 in3.

A nurse is educating a patient about cognitive-behavioral therapy (CBT) as a treatment for depression. Which statement best describes its role?

A patient with social anxiety disorder is prescribed sertraline (Zoloft). The nurse explains that this medication is in which drug class?

A nurse is developing a care plan for a patient with obsessive-compulsive disorder (OCD). Which interventions should be included? (Select all that apply.)

A nurse is explaining the role of serotonin and norepinephrine in depression to a nursing student. Which statement is correct?

A nurse is assessing a patient who reports feeling depressed for more than two years, with low energy and low self-esteem but without suicidal thoughts. Which depressive disorder is most likely?

A nurse is reviewing different classes of antidepressants. Which statements about antidepressant medications are correct? (Select all that apply.)