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.

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 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.

Research in which attempts are made to establish causality by drawing on naturally existing variations rather than active manipulation of the independent variable would most typically use a____________ design. A. true experimental B. developmental C. quasi-experimental D. non-experimental

第 21 个问题For convenience, a researcher tested her experimental group and control group in two different locations. Because location was not held constant, it could be responsible for any observed difference in the dependent variable. In this example, the differing locations would be considered a(n)1 分within-group variable.confounding variable.between-groups variable.independent variable.

When a confound exists in an experiment, it places restrictions onQuestion 5Answera.interpretations of the main effects.b.the statistical significance of the results.c.interpretations of the interactions.d.statements made about causation.