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 14 个问题Why would a researcher use a quasi-experimental design rather than an experimental design?1 分When the independent variable is easily confoundedWhen manipulation of the variable is possible and ethicalTo collect data in the real world where controls are difficultTo randomly assign participants

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 10 个问题Quasi-experiments cannot make causal claims because1 分all confounding variables are eliminated or controlled for.the dependent variables are random. there is no random assignment. the variables are manipulated.

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.

In an experiment to compare two treatments, the advantage of random allocation is:Group of answer choicestreatments are assigned according to the characteristics of the subjects.the sample is representative of a known population.the likely size of errors can be estimated.the two groups will be similar, apart from the treatment.the researcher will not know what treatment the participant will receive before recruiting them into the study.