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

______ studies are those in which participants do not know the experimental condition (group) to which they have been assigned.Multiple choice question.Single-blindDouble-blindExperimentalCorrelational

_____ occur when the behavior of the participants is influenced by the experimenter's knowledge of who is in which condition.Multiple choice question.Confounding variablesExperimenter expectancy effectsSingle-blind studiesPlacebos

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 -blind studies, participants do not know if they have been assigned to the experimental group or to the control group.

-blind studies are those in which neither the participants nor the researchers (at least the ones administering the treatment) know who has been assigned to the experimental or control group.