第 11 个问题A researcher is investigating the effectiveness of a new yoga program and assigns participants to either the experimental condition or control condition such that each person has an equal likelihood of being assigned to either condition. This strategy is called1 分random assignment.a matched-pairs design.using a homogeneous sample.balancing groups as a whole.

第 6 个问题Why is random assignment critical in an experimental research design? 1 分It makes the study reliable and valid.It provides evidence that there is a relationship between the measured variables.It ensures that the groups are equal prior to manipulating the independent variable.It allows the results to generalize to the population of interest.

第 5 个问题With a matched-pairs design, on which aspects is the researcher matching participants?1 分The participants’ posttest performance.The type of treatment the participants receive.The personal characteristics that might affect the dependent variable.The participants’ previous experience with research.

Random assignment is a procedure for assigning participants in an experiment to either the treatment or control groupMultiple choice question.based on the preference of the participant.based on what group the previous participant was assigned to.on the basis of chance, like the flip of a coin.based on a specific pattern picked by the experimenter in advance.

You flip a coin. If heads comes up the next person is in the treatment group. If it comes up tails, the next person is assigned to the control group. You areMultiple choice question.using random assignment in an experiment.using arbitrary assignment in an experiment.using random assignment in a correlational study.using arbitrary assignment in a correlational study.

Which of the following best describes a research study that randomly assigns people to different conditions and carefully controls all the other circumstances so that they will be equivalent across the two conditions?experimentcorrelationsurveyobservation