Suppose we decide to conduct an experiment with your statistics class. Our dependent variable is student absences, and our intervention is that after the 5th week, the instructor starts taking attendance publicly by calling out the name of each student. We measure attendance every week and see the trend before and after the intervention. What kind of experiment design is this?Group of answer choicesrandomisedTime seriesboth

A group of scientists is conducting an experiment on the effects of media on children. They randomly select 100 children and randomly assign each child to one of four treatment groups. Each treatment group has a specific amount of screen time during a one-week time frame. The first group has no screen time, the second group has two hours of screen time, the third group has four hours of screen time, and the fourth group has six hours of screen time.After the first week, the scientists conduct the same experiment, with the same subject groups, for three more weeks so that each group experiences each of the four treatments.Which statements about this study are true? This study uses blocking. This study uses blinding. This study uses random sampling. This study uses a repeated measures design. This study uses a control group.

Seema decides to observe how fishermen teach their children to row boats. Instead of just observing the participants, she decided to become one of the participants herself. What kind of research design is this?Group of answer choicesParticipant ObservationNaturalistic ObservationQuasi ExperimentSmall N design

In experimental research, the independent variable is manipulated or changed by the experimenter to measure the effect of this change on the dependent variable.  Group of answer choicesTrueFalse

A study is designed to test the effectiveness of a program to teach adolescents about nutrition. All research participants are randomly assigned to two groups, one which goes through the program and the other which does not. Both before and after the program, all participants take a test measuring knowledge of nutrition. What type of experimental design is this? A. posttest-only control group design B. pretest-posttest control group design C. 2 × 2 factorial design D. 2 × 4 factorial design

When planning an experiment, which of the following should you seek to avoid?Group of answer choicesAnalysisLogicBiasReplication