An experiment will be conducted to determine whether children learn their multiplication facts better bypracticing with flash cards or by practicing on a computer. Children who volunteer for the experiment will berandomly assigned to one of the two treatments. Because the children’s gender may affect the outcome, therewill be blocking by gender. After practice, the children will be given a test on their multiplication facts. Whywill it be impossible to conduct a double-blind experiment?(A) The experimenter will know whether the child is a boy or a girl and whether he or she used flash cards orthe computer.(B) The child will know whether he or she is a boy or a girl.(C) The child will know whether he or she used flash cards or the computer.(D) The person who grades the tests will know whether the child was a boy or a girl.(E) The person who grades the tests will know whether the child used flash cards or the computer.

In a large lecture hall, students were handed a drawing of a woman. Students didn’t know that those on the left side of the center aisle received a drawing of a young woman while those on the right side of the aisle were given a drawing of an old woman. A slide was then projected with an drawing that was an ambiguous combination of the two handouts and students were asked a series of questions.This is an example of which of the following? A blind observational study An observational study that isn’t blind A blind experiment An experiment that isn’t blind

In a ________ experiment neither the researcher nor the participants know which condition participants are in.a. blindb. double-blindc. randomd. confounded

Sarah is a researcher at a children's psychiatric center. Her office has just been asked to conduct a pilot study on a new prescription medication used to treat anxiety called Drug X. Sarah wants to figure out if Drug X causes a reduction in anxiety-like the drug company claims. How can Sarah answer this question through a true experiment? Group of answer choicesSarah needs to randomly assign half of her participants to the treatment group and half to a control group for her studySarah needs to conduct a field experiment and should not worry about the random assignment of participants.Sarah needs to randomly assign her participants, and she must only conduct her study at different stages of participants’ lives.

In a recent study to establish the effectiveness of a new cancer drug, subjects were randomly divided into three groups. Group A got a known and effective cancer drug, group B got the new experimental compound, and group C got a combination of the two drugs. None of the individuals nor the nurses knew group assignments, and nurses administering the drugs did not know what drug was being administered to their patients.Which of the following is a correct statement about this study? It was a blind study because subjects did not know the treatment they were receiving. It was a double-blind study because neither the subject nor the experimenter knew what the treatment for a patient was. It was not a blind study because there was no placebo. It was not a blind study because patients knew they were participating in a study.

In a recent study to establish the effectiveness of a new cancer drug, subjects were randomly divided into three groups. Group A got a known and effective cancer drug, group B got the new experimental compound, and group C got a combination of the two drugs. None of the individuals nor the nurses knew group assignments, and nurses administering the drugs did not know what drug was being administered to their patients.Which of the following is a correct statement about this study? It was a blind study because subjects did not know the treatment they were receiving. It was a double-blind study because neither the subject nor the experimenter knew what the treatment for a patient was. It was not a blind study because patients knew they were participating in a study. It was not a blind study because there was no placebo.