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 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

What is the Hawthorne Effect?Select one:The process of observing staff carrying out their duties for requirements gatheringPeople’s tendency not to speak up in a group because they are being observed by othersThe response of a team member when another team member is given a rewardPeople’s tendency to behave differently when they are being observed

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

A study was conducted to explore the possibility of a podcast treatment effect on someone's ability to estimate time. One version of the study involved 95 school students. Each student was led into a dark room, and asked to press a button exactly three minutes after a signal was given. The time that actually passed from the signal to the pushing of the button was recorded in seconds. The school students were allocated to a group randomly at the time that they signed up for the study. One group listened to a podcast during the study, while the other group did not. The researchers found a difference of 8.7 seconds between the mean of the times recorded for each group, with the group that listened to a podcast having the higher mean. The tail proportion from a randomisation test carried out with the data from the study was 109/1000. Is the observed difference unusual when compared to the 'just chance' distribution? (enter yes or no)

Experimenter expectancy effects occur when the behavior of the is influenced by the experimenter's knowledge of who is in which condition.