The tendency of a researcher to subtly and inadvertently affect the behavior of the participants in a study, obscuring the true effect of the independent variable, is called___________.a.Placebo effectb.The Hawthorne effect c.Evaluation apprehension effectd.Experimenter Bias effectClear my choice

The Hawthorne Effect describes a type of bias where a participants behaviour becomes influenced and uniform with a large number of other participants in a trialGroup of answer choicesTrueFalse

第 8 个问题A researcher wanted to observe student participation during a typical class, but was concerned the students might behave differently if they noticed her presence. She decided to attend class for 10 days before collecting any data so as to habituate students to her presence and avoid 1 分contamination by communication.the observer-expectancy effect.the Hawthorne Effect.the placebo effect.

The tendency for people to act differently when they know they are being studied is:Multiple choice question.always a hygiene factornot important to researchersthe Herzberg effectthe Hawthorne effect

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

Fill in the blanks to complete the passage about problems that threaten the construct validity of observational research.When observers’ knowledge of the research hypothesis influences how they record their observations, – occurs. When participants change their behavior based on perceived expectations from the observer, it is called –. When people change their behavior based on the presence of someone else, this is known as –.observational researchmasked designobserver biasreactivityobserver effects